From Yale News
November 20, 2017

The immune system’s response to the Zika virus, rather than the virus itself, may be responsible for nerve-related complications of infection, according to a Yale study. This insight could lead to new ways of treating patients with Zika-related complications, such as Guillain-Barré syndrome, the researchers said.

In mice models lacking a key antiviral response, infection with Zika virus causes paralysis and death. To understand the mechanism, a research team led by immunobiologist Akiko Iwasaki examined the spread of infection in these mice.

The research team found that when the Zika infection spreads from the circulating blood into the brain, immune cells known as CD8 T cells flood the brain. While these T cells sharply limit the infection of nerve cells, they also trigger Zika-related paralysis, the researchers said.

“The immune cells that are generated by infection start attacking our own neurons,” Iwasaki said. “The damage is not occurring through the virus infection, but rather the immune response to the virus.”

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From CBS Miami
November 20, 2017

MIAMI (CBSMiami) — A drug used to prevent and treat malaria could also help fight the Zika virus, according to research published Monday.

It’s called chloroquine and it’s been used since the 1950s, researchers said.

Dr. Angela Rocha (C), pediatric infectologist at Oswaldo Cruz Hospital, examines Ludmilla Hadassa Dias de Vasconcelos (2 months), who has microcephaly, on January 26, 2016 in Recife, Brazil. (Mario Tama/Getty Images)

The drug is easily available, low in cost and has a history of being safe to use during pregnancy.

Researchers say the drug, when tested on pregnant mice, significantly reduced the amount of the virus in maternal blood and certain cells in the fetus’s brain.

It’s a good sign since the virus is considered a major global health risk, especially for pregnant women.

They’re most at risk since the virus causes serious birth defects like microcephaly – a defect that has no way to reverse or treat.

“Although chloroquine didn’t completely clear Zika from infected mice it did reduce the viral load, suggesting it could limit the neurological damage found in newborns infected by the virus,” said Alexey Terskikh, Ph. D., who co-authored the study which was published in Scientific Reports.

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From The Johns Hopkins News-Letter
November 16, 2017

Recently, the number of people suffering from Zika virus throughout the world has significantly decreased. However, biologists predict that Zika will return with a vengeance, potentially leading to more infections.

Ernesto Marques, associate professor of infectious diseases and microbiology at the University of Pittsburgh Graduate School of Public Health, suggested that Zika will reemerge in due time, just like other arboviruses such as yellow fever and dengue.

“You have big booms, then they drop. Then a few years later, they come back again,” he said, according toThe Washington Post.

Scientists first identified the Zika virus in monkeys in 1947. The following year, scientists rediscovered the virus, and named it after the Zika forest in Uganda where it was first discovered in Aedes africanus mosquitoes.

Virologists have subsequently classified Zika as an arbovirus, a type of virus that is transmitted by arthropod vectors such as ticks and mosquitoes. In 2007, the first major Zika outbreak occurred in Yap, a small island in the Pacific Ocean.

The disease can spread in three ways: It can be transmitted through mosquito bites, sex and from a pregnant woman to her fetus.

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From TIME Magazine
November 16, 2017

From Futurism
November 15, 2017

SELF-DESTRUCTING MOSQUITOES

Gene editing is an incredibly powerful technique, made faster and more capable by CRISPR, which is the world’s most efficient and exact genetic manipulation tool. Now, in an effort to demonstrate how gene editing could be used to eradicate the mosquito species Aedes aegypti —a major carrier of diseases like dengue, chikungunya, yellow fever, and Zika virus— researchers from the University of California, Riverside (UC Riverside) developed mosquitoes whose germlines express the Cas9 enzyme in a more stable way.

The result is a yellow, three-eyed, wingless mosquito, made possible through disruptions in the insect’s cuticle, wing, and eye development. These transgenic mosquitoes are now more susceptible to the use of CRISPR-Cas9 to facilitate edits that could lead to the eventual eradication of the species.

This is just a first step, however, according to lead researcher Omar Akbari, an assistant professor of entomology at UC Riverside, who published the study in the journal of the Proceedings of the National Academy of Sciences (PNAS). Ultimately, the plan is to combine CRISPR-Cas9 with the use of gene drives systems, a technology that increases the chance for a particular gene to express from a parent organism to its offspring.

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From The Tribune
November 14, 2017

Five birds have tested positive for West Nile virus in 2017, an “unusually high” number and more than in recent years, the San Luis Obispo County Public Health Department said on Tuesday.

The most recent case was collected on Nov. 9 in San Luis Obispo, the department said in a news release. Additionally, two birds were found in Atascadero, one in Templeton and one in Paso Robles.

San Luis Obispo County saw no confirmed cases of West Nile in birds from 2014 to 2016 and only one case in both 2012 and 2013, according to the Public Health Department.

Dr. Penny Borenstein, the county’s public health officer, said in a news release that though the number is higher than it has been in recent years, it’s “not surprising following this year’s rainy winter.”

Borenstein added that West Nile is transmitted by mosquitoes that breed in standing water, so an increase in rain means an increase in breeding sites.

While most people infected with West Nile do not experience symptoms, about one in five have flu-like symptoms and a small number of those affected develop a serious neurologic illness, the Public Health Department said. The risk is higher for people over 50 and people with medical conditions like diabetes and hypertension.

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From Los Angeles Daily News
November 13, 2017

More people were infected and died of West Nile virus across California this year compared to last year, especially in Los Angeles County. That’s where the number of infections peaked in September, recent data show.

Statewide, there have been 25 deaths so far this year, or six more than all of last year, according to recent data from the California Department of Public Health. In addition, 454 people from across the Golden State were infected this year, a 17 percent increase from 2016.

Though the end of the season is approaching, more reports of infections and deaths are likely, public health officials said.

In Southern California, Los Angeles County seemed to bear the brunt of both infections and deaths. So far, 235 people have been infected by the disease and 17 people have died, including one person in Long Beach. The numbers surpass last year’s 153 cases and 6 deaths, according to the Los Angeles County Department of Public Health.

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From WAMU
November 9, 2017

Two years ago, when the Zika virus was first identified as the cause of microcephaly in babies, women were scared. Expectant mothers who got infected had no idea what the chances were of having a healthy baby. Researchers have since learned that while Zika infection is dangerous, about 94 percent of babies born to women infected with Zika appear to be normal at birth.

Yariel is one of them. He’s a curious little one year old — calm and smiley, with a head full of curls. Looking at him, it’s impossible to know that his mother had Zika when she was pregnant.

Yariel is a patient of Dr. Sarah Mulkey, a fetal neo-natal neurologist at Children’s National Health System in Washington D.C., who is studying babies born to women with Zika to try and find out how OK they really are.

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From CBS Los Angeles
November 7, 2017

From The Washington Post
November 7, 2017

Experts who work on the mosquito-borne West Nile virus have long known that it can cause serious neurological symptoms, such as memory problems and tremors, when it invades the brain and spinal cord.

Now researchers have found physical evidence of brain damage in patients years after their original infection, the first such documentation using magnetic resonance imaging, or MRI.

Brain scans revealed damage or shrinkage in different parts of the cerebral cortex, the outer part of the brain that handles higher-level abilities such as memory, attention and language.

“Those areas correlated exactly with what we were seeing on the neurological exams,” said Kristy Murray, an associate professor of pediatric tropical medicine at Texas Children’s Hospital and Baylor College of Medicine and lead author of the study. “The thought is that the virus enters the brain and certain parts are more susceptible, and where those susceptibilities are is where we see the shrinkage occurring.”

Results of the study, which has not yet been published, were presented Tuesday at the annual meeting of the American Society of Tropical Medicine and Hygiene. The 10-year study of 262 West Nile patients is one of the largest assessments studying the long-term health problems associated with West Nile infections.

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From KESQ
November 6, 2017

COACHELLA VALLEY, Calif. – Bugs have invaded the Coachella Valley. People have reported seeing thousands of the small insects on car windshields and in their pool. 

The owner of Coachella Valley Pest Control tells KESQ/CBS Local 2’s Lauren Coronado they’re Boatman bugs. 

Craig Conaway is the owner of Coachella Valley Pest Control. He thinks they’re coming from the Salton Sea, where people have reported clouds of bugs flying overhead. U.S Fish and Wildlife also believe the bugs are from the Salton Sea. Chris Schoneman, a spokesperson with U.S Fish and Wildlife thinks the mass quantities of the boatman bug have to do with less fish consuming the bug. But representatives with the Salton Sea can’t verify that.

“There’s like thousands and hundreds, like a lot. It makes me itchy just by looking at them. That’s not normal,” Narely Botello, of Indio said.

Christy Lane, of Palm Desert, has also been impacted by the infestation.

“It went from hundreds, I think, to thousands. I honestly think there’s thousands in that pool,” Lane said.

Botello and Lane are just two of many people dealing with a bug infestation, here in the Coachella Valley.

Botello has them all over her car, while Lane says they’ve taken over her pool.
 
Local pool companies say they can’t kill them with the usual pool cleaning chemicals.  

“I’m getting calls from people — ‘What can I do? What can I do?’ and we really don’t know. We have kind of picked up on the fact that they’re not in the hot tubs as much as the pools. So we’re thinking there’s a temperature thing there,” Conaway said.

Conaway says the bugs are harmless. A spokesperson with Coachella Valley Mosquito and Vector Control says the Boatman bug is not capable of carrying diseases. But according to Conaway, they’re nearly impossible to kill off. 

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From EquiManagement
November 1, 2017

Ontario, Canada, has reported additional cases of Eastern equine encephalitis (EEE) and equine West Nile virus (WNV). 

Second EEE Case in Ontario

A second case of Eastern equine encephalitis was confirmed by the Ontario Ministry of Agriculture Food and Rural Affairs the week of October 23, 2017. The 19-year-old mixed breed mare was 11 months pregnant and unvaccinated for EEE. She was from the District of Muskoka. Neurological signs began as muscle tremors and hind end weakness and progressed rapidly to recumbency. The mare was euthanized. 

This is the second confirmed case of EEE in Ontario in 2017.

Three New Equine WNV Cases in Ontario

Since October 19, 2017, three cases of equine West Nile virus have been reported in Frontenac County, Oxford County and the Regional Municipality of Halton according to the Ontario Ministry of Agriculture, Food and Rural Affairs. The horses were a gelding, a filly and a mare with ages ranging from 2 to 11 years. Clinical signs ranged from hind end weakness, muscle fasciculations and hyperesthesia to ataxia. All three are recovering under veterinary supervision. One horse was unvaccinated, one had not been vaccinated for three years, and one 4-year-old had been vaccinated yearly since it was two. 

There have been 21 total equine WNV cases reported in Ontario in 2017.

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From CNN
November 1, 2017

From CBS SF Bay Area
October 31, 2017

SANTA ROSA (CBS SF) — Sonoma County health officials said Tuesday they were concerned by the mosquito breeding threat posed by backyard pools in homes that were destroyed in this month’s devastating wildfire outbreak.

Marin/Sonoma Mosquito & Vector Control District officials said they had begun mosquito surveillance and control work in residential areas affected by the recent fires.

“Currently our main concern is spas and swimming pools that can produce tens of thousands of mosquitoes if left unmaintained,” said Jason Sequeira, Field Supervisor for the Marin/Sonoma Mosquito and Vector Control District, in a news release. “Areas found producing mosquitoes will be treated with environmentally compatible materials, documented, and monitored.”

The fires destroyed approximately 7,400 structures across the wine country with the majority of those buildings being homes.

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From The Los Feliz Ledger
October 31, 2017

West Nile Virus is on the rise across Los Angeles with 208 reported cases this year according to Los Angeles public health officials. Vector control authorities said chickens and mosquitos in Los Feliz have tested positive for the virus in recent weeks.

With chickens testing positive for the virus, it is likely there have been human cases in the area as well, according to a spokesperson with the Greater Los Angeles Vector Control.

The virus often goes unreported as people who are infected often show no symptoms or mistake it for a bad case of the flu, according to officials.

“The numbers that we see reported are probably just the tip of the iceberg. It’s likely that there are hundreds more cases every year,” said Levy Sun, a spokesperson with Vector Control.

Symptoms often include fever, headache, body aches, joint pain, vomiting, diarrhea, or rash, according to the Centers for Disease Control website.

Only one in five cases will show any symptoms at all, but people who are already sick with a chronic illness such as cancer and those older than 50 may be affected more severely by West Nile symptoms.

“We are currently in an epidemic for West Nile virus,” said Sun. “Contrary to pop culture and perhaps the current news definition of ‘epidemic,’ we’re just saying that this is above average for the year. It’s not something to really panic about, but it’s definitely a cause for concern.”

There have been more than 200 reported cases of humans infected with West Nile Virus in Los Angeles this year, up from 153 in 2016, according to the Los Angeles County Public Health Dept.

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From Fox News
October 31, 2017

Doctors hope a mosquito trap will prevent the spread of disease. The trap is smart enough to know what type of mosquito it’s trapping, and if by the small chance it catches the wrong one, it will learn from its mistake.

The smart trap senses the wing length and wing beats to detect what type of mosquito has entered the chamber.  If it’s the type of mosquito the scientists are looking for – the kind spreading fatal diseases – the chamber will close and trap the mosquito inside.

“If we want the Aedes Aegypti, which is the yellow fever mosquito, or the Asian Tiger Mosquito, that carries Zika virus, we will train this trap to only catch those mosquitos,” said Dr. Mustapha Debboun, director of Harris County Public Health’s mosquito control division.

Harris County includes Houston, Texas, which was devastated by Hurricane Harvey. After the storm, Debboun and his team worked to set traps around the county to determine whether the stagnant water left by the storm became a breeding ground for mosquitos and if the mosquitos were carrying diseases. Harris County is a test site for the high-tech device, becoming the first government agency in the country to try it out.   

The trap was developed by Microsoft as part of Project Premonition. It’s designed to help entomologists perform their job faster. In turn, the trap should help create an “early-warning system” for outbreaks that allows doctors to catch diseases while they’re still in the field, instead of catching them when sick patients start filling up hospitals.

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From Stanford News
October 31, 2017

It’s a sound that can keep even the weariest among us from falling asleep: the high-pitched whine of a mosquito. This irritating buzz already makes us run, slap and slather on repellent. But if Stanford University researchers have their way, it may also prompt us to take out our cellphones and do a little science.

The Prakash Lab at Stanford, led by Manu Prakash, assistant professor of bioengineering, is looking for citizen scientists to contribute to Abuzz, a mosquito monitoring platform the lab developed to produce the most detailed global map of mosquito distribution. All that’s required to participate is a cellphone to record and submit the buzz of a mosquito, which means almost anyone from around the world can take part in this work.

More than mere pests, mosquitoes can carry deadly diseases, including malaria, yellow fever, dengue, West Nile virus, chikungunya and Zika. Diseases spread by mosquitoes result in millions of deaths each year and the burden of their effects is carried most strongly by places with the fewest resources.

“We could enable the world’s largest network of mosquito surveillance – just purely using tools that almost everyone around the world now is carrying in their pocket,” said Prakash, who is senior author of a paper that demonstrates the feasibility of this approach, published in the Oct. 31 issue of eLife. “There are very limited resources available for vector surveillance and control and it’s extremely important to understand how you would deploy these limited resources where the mosquitoes are.”

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From Science News
October 30, 2017

Less than a year after the World Health Organization declared Zika is no longer a public health emergency, the virus seems to have fallen from public consciousness, at least outside of heavily affected areas. The mosquito-borne virus staged a massive assault on the Western Hemisphere in 2015 and 2016(SN: 12/24/16, p. 19), but this year, Zika appears to be in retreat.

In the hardest-hit countries, data from each country’s department of health shows a striking drop in locally acquired cases, that is, ones caused by bites from local, infected mosquitoes. For instance:

• Brazil had over 216,000 probable cases in 2016; as of early September, the new cases for 2017 were around 15,500.
• Colombia tallied more than 106,000 suspected and confirmed cases from 2015 to the end of 2016. This year, new cases have plummeted, with around 1,700 by mid-October.
• Mexico went from about 8,500 confirmed cases in 2015 and 2016 combined to around 1,800 by early October of this year.

The numbers have also dropped in the United States and its territories. In Puerto Rico, Zika cases hit nearly 35,000 in 2016, the U.S. Centers for Disease Control and Prevention reports. But this year, less than 500 cases have been tallied as of mid-October. In the 50 states, the CDC counted about 5,100 cases in 2016. Most were in travelers who had been to places where Zika was active, although 224 were locally acquired in Florida and Texas. So far in 2017, only about 300 cases have been reported as of mid-October, mostly from travelers. Local transmission seems to have come to a standstill, with one suspected case in Texas and one case confirmed in Florida.

That doesn’t mean Zika’s days are numbered. If Zika behaves like other arboviruses, such as chikungunya and dengue, it will probably stick around. Arbovirus diseases tend to be cyclical, says public health researcher Ernesto Marques of the University of Pittsburgh. “You have big booms, then they drop. Then a few years later, they come back again.”

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From VC Star
October 28, 2017

While Ventura County has seen only one human case of West Nile virus this year, neighboring Los Angeles County has seen more than 200 cases, with 17 deaths.

Dr. Robert Levin, Ventura County public health officer, said the one local human case of the mosquito-carried illness occurred in west Ventura County, declining to be more specific. News of the case emerged Tuesday.

Three birds in Ventura County have tested positive for the virus this year, with the Ventura County Environmental Health Division learning results from the latest one on Thursday. The bird was collected from the Simi Valley area during the second week of October.

Mosquitoes caught on three separate occasions this year in Ventura County also have tested positive, officials said.

The virus can affect humans, birds and horses. Most humans who contract the virus are asymptomatic, while some exhibit fever, headaches, nausea and vomiting. One out of every 150 become seriously ill, however, with such maladies as meningitis, vision, loss, coma and paralysis.

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From EurekAlert
October 27, 2017

Researchers at the University of California San Diego School of Medicine, with colleagues in Brazil, report that the Zika virus is transmitted from mother to fetus by infected cells that, ironically, will later develop into the brain’s first and primary form of defense against invasive pathogens.

The findings are published in the current online issue of Human Molecular Genetics.

“It’s a Trojan Horse strategy,” said Alysson Muotri, PhD, professor in the UC San Diego School of Medicine departments of Pediatrics and Cellular and Molecular Medicine. “During embryogenesis — the early stages of prenatal development — cells called microglia form in the yolk sac and then disperse throughout the central nervous system (CNS) of the developing child.

“In the brain, these microglia will become resident macrophages whose job is to constantly clear away plaques, damaged cells and infectious agents. Our findings show that the Zika virus can infect these early microglia, sneaking into the brain where they transmit the virus to other brain cells, resulting in the devastating neurological damage we see in some newborns.”

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From The Orange County Register
October 25, 2017

A fly landing on salad. A roof rat scurrying across the yard. A flea hopping from your pet to your skin.

For a moment, forget West Nile virus mosquitoes. The disease these other bad boys spread also can destroy lives.

Then there’s our newest scary critter — the yellow fever mosquito that recently invaded Los Angeles, Riverside, San Bernardino, Orange and other California counties.

Dig deep into the work of what’s called vector control and you feel lucky to come out alive.

Fortunately, experts strive to keep these sometimes deadly disease carriers under control so that most of us will live.

Yes, most of us.

According to a newly released report from the California Department of Public Health, Orange County has seen 28 West Nile virus deaths since the outbreak started in 2002, including one this year.

Also this year, San Bernardino County has reported two deaths; in Los Angeles County, 10 people have died; and in Riverside County, at least three people have been infected.

But did you know dozens of people in Southern California have been diagnosed with flea-borne typhus? Authorities also report it’s likely that many more people have been infected with typhus but are undiagnosed.

Pay attention now because what I discovered during a long and detailed conversation with Robert Cummings, Orange County Mosquito and Vector Control District director of scientific technical service, is that there is much we can do to make our communities safer.

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From Sonoma News
October 23, 2017

The Marin-Sonoma Mosquito and Vector Control District protects the health and welfare of the communities it serves from mosquitoes and vector-borne diseases by utilizing cost-effective, environmentally responsible integrated vector management practices.

El Verano Preschool Director Sonya Valiente invited Vector Control to come to her classroom and presentat on yellow jackets.

“He was here for 30 minutes, read a story and talked about wasps,” she said. “The children learned what to do when they see a yellow jacket and how to help them. He left visuals for the children to look at, including a nest, photos and game.”

Valiente said that last year Vector Control came to her classroom to talk about mosquitoes, and that her young students were excited by the real-world learning in both presentations.

From UCANR
October 23, 2017

Summer may be over, but continued warm weather means that mosquitoes are still active. So far this year, 361 cases of the mosquito-borne illness West Nile Virus (WNV) have been reported* in 23 California counties from Imperial to Shasta. Sadly, 18 of these cases resulted in death. The disease is most serious in children, people with weakened immune systems, and the elderly.

Mosquitoes that can transmit WNV breed in aquatic environments like ponds or other sources of stagnant water such as roof gutters, bird baths, and swimming pools.

You can minimize mosquito habitat in your landscape by:

• Cleaning rain gutters and downspouts to remove debris.
• Sealing rain barrels. Keeping all filters and prefilters clean and free of moisture-retaining debris and inspecting regularly for leaks.
• Maintaining quality in swimming pools with chemical treatments. Covering or draining water from plastic pools when not in use.
• Turning over any unused garden pots, children’s toys, and other objects so they don’t hold water.

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From YubaNet.com
October 20, 2017

PLACERVILLE, CAlif. October 20, 2017 – El Dorado County health officials received confirmation last week that a bird found in the Garden Valley area of El Dorado County has tested positive for West Nile virus, the second for 2017. The bird, an Acorn Woodpecker, was tested on September 29th. So far this year, West Nile virus activity in dead birds has been reported in 38 California counties with a total of 463 dead birds, including neighboring Sacramento (86 birds) and Placer (3 birds) counties.

Confirmation of the West Nile virus positive bird means the virus is circulating between birds and mosquitoes and there is heightened risk of infection in humans. It’s important to take precautions. Last year, four (4) West Nile virus positive birds were identified in El Dorado County on the western slope and one human case reported. For 2017, no human cases of West Nile virus have been reported for El Dorado County.

West Nile virus can be transmitted to people through the bite of an infected mosquito. Mosquitoes get the virus when they feed on infected birds. The illness is not spread from person-to-person. While most people infected with the virus show no symptoms, some may have high fever, severe headache, tiredness and/or a stiff neck that can last several days to several weeks. The most serious cases of West Nile virus infection can lead to encephalitis, an inflammation of the brain, which can be fatal.

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From Popular Science
October 19, 2017

Mosquitoes are weird fliers.

Your typical aeronaut—a sparrow or a fruit fly, for instance—takes flight by jumping into the air. Only once aloft do they begin to flap their wings.

Mosquitoes have the perplexing distinction of doing basically do the opposite. They begin their flight pattern by flapping their wings for 30 milliseconds before jumping into the air. And they beat their wings fast, as much as 800 times per second, when most other insects their size would ordinarily only flap their wings around 200 times.

“One of the key questions of aerodynamics and biomechanics is, why do they fly in a way that doesn’t look efficient?” says Florian Muijres a biomechanics researcher at Wageningen University in the Netherlands. Muijres is an author on a recently released study in the Journal of Experimental Biology that looks at why the mosquito might have developed such an unusual manner of flight. It may be a sophisticated way of evading detection.

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From NPR
October 18, 2017

There are 2,666 emojis available for tweets and texts.

Everything from a butterfly to a croissant to a unicorn.

But global health advocates think there’s one important emoji that’s missing: the mosquito. It is, after all, the world’s deadliest animal. The diseases it spreads, like malaria and dengue, cause one million deaths a year.

That’s why the Bill & Melinda Gates Foundation (which is a funder of this blog) and the Johns Hopkins Center for Communication Programs are lobbying intensely for a mosquito emoji.

Having a mosquito emoji would be a welcome change, say Cornell University doctoral students Talya Shragai and Kara Fikrig, who study mosquitoes. Because really, using a sword next to a butterfly or a bee paired with a caterpillar — some of the emoji workarounds they’ve seen and used in text messages and tweets — just isn’t good enough.

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From KESQ
October 16, 2017

PALM SPRINGS, Calif. – For the second time in Palm Springs this year, a sample of mosquitoes have tested positive for West Nile.

The Coachella Valley Mosquito and Vector Control District positive sample contained 16 mosquitoes from a trap located near Mesquite Avenue and Gene Autry Trail.

The District will post disease notification signs in communities located in the area where the mosquitoes were trapped and will increase mosquito surveillance.

Technicians will also carry out larval and adult control in the surrounding area in an effort to reduce the number of mosquitoes and interrupt further virus transmission. 

Residents can reduce mosquitoes by draining standing water, installing or repair screens, and applying insect repellent.

Read more

From KESQ
October 11, 2017

MECCA, Calif. – Mecca has become the latest city in the valley to be detected with the Aedes aegypti mosquito.

The Coachella Valley Mosquito and Vector Control District detected three adult mosquitoes and 37 mosquito larvae in a Mecca neighborhood that were identified as an invasive mosquito species capable of transmitting serious viruses such as chikungunya, dengue, yellow fever, and Zika.

While these viruses are not currently transmitted locally, the District is taking steps to reduce the spread of this mosquito throughout the Coachella Valley.

Beginning Oct. 16, the District will conduct increased trapping in the area to evaluate the extent of the infestation and technicians will start a door-to-door campaign searching for standing water sources in people’s backyard where this mosquito species commonly lays eggs.

Read more

From KHTS AM 1220
October 10, 2017

The disease-transmitting Aedes mosquito has been confirmed in the Santa Clarita area, prompting city officials to host a Public Information Session about the species.

The session will be held at the City Hall Council Chambers on October 23, from 6:30 p.m. to 7:30 p.m.

Officials will be discussing combative measures to control the Aedes mosquito species locally. Residents will be offered tips to protect themselves and their families.

Public Information Officers Levy Sun and Wesley Colling from the Greater Los Angeles County Vector Control will be there to discuss protection options for residents and business owners.

“Residents, businesses, property management companies and landscapers are encouraged to attend this meeting,” a city news release stated.

The Greater Los Angeles Vector Control District tells residents that the Aedes mosquito is a public health concern because they can transmit Zika virus, dengue fever, yellow fever and chikungunya.

The Aedes mosquito is known to bite during the day, live in cities and thrive indoors and outdoors, the city news release said.

For additional information regarding the session, please contact Levy Sun at (562) 325-3271. For more information about Aedes mosquitoes, visit the Greater Los Angeles County Vector Control District website here.

From Contra Costa MVCD
October 10, 2017

From The Orange County Register
October 6, 2017

The peak season of the mosquito-borne West Nile virus should be nearing its end, but state and local agencies are warning people to keep up the fight against mosquitoes.

There were 47 new cases of the disease reported across the state in the past week. Nearly all were in Southern California. Orange County recorded its first West Nile virus-related fatality Oct. 6.

You can see the state totals here.

The Mosquito and Vector Control Association of California is warning people that West Nile virus cases have spiked this fall in Southern California, and three deaths from the disease were reported last month. In addition to fatalities, 88 percent of the reported infections in Los Angeles County have required hospitalizations.

Peak season
Cases of West Nile virus in 2016 by week in the U.S.
Most cases of the virus are reported in the warm summer months, but local vector agencies are warning people of a spike in cases this fall.

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From The Record Searchlight
October 3, 2017

Four “sentinel chickens” east of Redding have tested positive for West Nile virus, according to the Shasta Mosquito and Vector Control District.

The district keeps flocks of chickens in various locations within the district as disease sentinels. The presence of the virus in chickens indicates “this is a sign of increased risk to people from West Nile virus,” the district said in a news release.

“Even though temperatures are dropping, we are still actively trapping mosquitoes that have the potential to transmit West Nile virus. If you plan to be outside during dusk or dawn, it is imperative you continue to protect yourself from mosquito bites,” cautioned Peter Bonkrude, district manager of the Shasta Mosquito and Vector Control District.

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From Sierra Wave Media
October 2, 2017

OVMAP news release

Recent mosquito trap data indicate that recent aerial larviciding treatments were very successful, with mosquito populations reduced by about half in the two weeks following aerial management activities.

To illustrate the scope of what was conducted during aerial management Rob Miller, OVMAP Interim Manager, stated that “OVMAP applied roughly 10 times the
amount of material used in a year in just two days” via helicopter.

This larvicide works by introducing naturally-occurring bacteria into breeding habitat, stopping normal mosquito larval development and preventing these larvae from becoming biting adult mosquitoes.

Since the bacteria only target certain species of mosquito larvae, it is safe for use around animals, plants, and other insect species. Control should last from 30 to 60 days.

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From West Valley MVCD
October 2, 2017

The West Valley Mosquito and Vector Control District has detected the presence of Aedes albopictus, commonly known as the Asian tiger mosquito, in Montclair. This detection occurred during routine surveillance near Kingsley and Ramona Ave.

Aedes albopictus are small, black and white mosquitoes that will aggressively pursue people during the day and the evening. They prefer to lay eggs in man-made receptacles such as tires, fountains, potted plants, and birdbaths. Asian tiger mosquitoes lay their eggs singly on the sides of containers, usually just above the water line, and when the eggs meet with water, they activate and hatch. They are not solely outdoors either, they will lay eggs in containers inside homes as well.

Aedes albopictus are an important species because they are known transmitters of West Nile virus, Dengue, and Zika virus. They have been spreading rapidly throughout Southern California, and have the potential to be a serious vector in our region.

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From Stat News
September 29, 2017

EL MONTE, Calif. — The chickens are used to the needles.

They don’t fuss when vector ecologist Tanya Posey pulls opens the door of a coop in a community garden here, firmly grasps a Leghorn, and pulls a blood sample out of its wing vein. She’s so good, she can bleed a chicken in about 30 seconds.

That’s helpful, because she has a lot of chickens to test.

More than six dozen sentinel chickens, living in coops dotted around Los Angeles, make up one of the first lines of defense in this sprawling county’s fight against West Nile virus. The disease has been a background threat for years here, but cases have spiked this fall to worrisome levels. Six deaths have been reported by Los Angeles County this year — including three just last week.

And the cases are alarmingly severe: Of 98 reported infections here this year, 79 have led to serious neurological side effects, and 87 have required hospitalization. Because it’s still peak mosquito season, more deaths are expected.

So local public health officials this week launched an all-out attack. They’re sending teams of green-shirted vector control agents door to door to tell residents to wear bug spray, install window screens, and dump the stagnant water where the insects breed. They’re plastering the county with posters that read “It’s Not Just a Bite” and “No Es Solo Un Piquete.” They’ve even created a rap video featuring a fetid swimming pool, a giant dancing mosquito, and teams of uniformed agents rapping, “You’ve got to dump the water out, drain the water flow, tip the water out, toss the water slow.”

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From The Los Angeles Daily News
September 27, 2017

Vector control agents conducted a pre-dawn raid on adult mosquitoes in the Sepulveda Basin on Wednesday to knock down the populations in an effort to reduce the spread of West Nile virus.

The truck-mounted, ultra-low volume fogging in the Sepulveda Basin recreation area should not affect any visitors to the area who use the trails, said Kelly Middleton, a spokeswoman for the Greater Los Angeles County Vector Control District.

She said the product used to eradicate the insects is a synthetic, man-made chemical based compound called pyrethrins found in chrysanthemums.

“One of the reasons we use these products is it’s very effective against these (mosquitoes),” she said. “There are no concerns for exposure for people. The pesticide is only effective a short period of time.”

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From ABC 7
September 26, 2017

Several people have died this year from the West Nile Virus in Southern California. With mosquito season in full swing, local public health experts issued a warning about the serious health concern.

A campaign to spread awareness about the continued risk of mosquito-borne diseases, like West Nile and Zika, launched today in Los Angeles County.

Fourth District Supervisor Janice Hahn said there have been 98 individual cases of the West Nile virus and six confirmed deaths in the area so far.

“Mosquitoes can carry serious and even deadly diseases and every precaution should be taken to protect yourself and your family from bites,” Hahn said.

Hahn will go door to door with the L.A. County Department of Public Health educating residents on how to better protect themselves. The first step is to get rid of any standing water and also the containers that held the water.

Officials said educating the public about the dangers of mosquitoes is especially important because peak season for mosquitoes can last well into November, if the weather stays warm.

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From The Porterville Recorder
September 25, 2017

The yellow fever mosquito has been found in the City of Tulare by the Tulare Mosquito Abatement District, the Tulare County Health and Human Services Agency reported.

Press Release From Merced County MAD
September 25, 2017

MERCED, CA– The Merced County Mosquito Abatement District identified Aedes aegypti, also known as the yellow fever mosquito, in the city of Merced (zip code 95340). This mosquito is capable of transmitting several human diseases, including dengue, chikungunya, yellow fever, and Zika. This mosquito is not native to California and is the first detection in Merced County. Since 2013, Aedes aegypti has been detected in 13 other California counties, primarily south of Merced.

The Merced County Mosquito Abatement District is working with the California Department of Public Health in addition to the Merced County Public Health Department to evaluate the extent of the infestation and will aggressively target problem areas to prevent its spread. These efforts will include door-to-door inspections of residential properties for standing water where mosquitoes can breed, increased surveillance through trapping, eliminating mosquito breeding sources, larval control, and ultra-low volume adulticiding (fogging) as necessary to target the invasive mosquitoes. Fogging will begin immediately in the infestation area.

“Our goal is to mitigate the spread of these invasive mosquitoes to other areas of Merced or the county at large. Having Aedes aegypti in our District is very concerning as it is an efficient vector in spreading Zika, dengue, chikungunya, and yellow fever viruses,” said Rhiannon Jones, General Manager of Merced County Mosquito Abatement District. While these viruses are not currently transmitted in California, they are periodically introduced by international travelers. If a large population of Aedes aegypti is established in the area, a single travel-associated case of one of these diseases could introduce the virus to local mosquitoes, and Merced County residents could be at risk of becoming infected.

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