Yellow Fever News and Research

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Yellow fever virus, a flavivirus, is transmitted to humans through the bite of infected mosquitoes. Illness ranges in severity from a self-limited febrile illness to severe hepatitis and hemorrhagic fever. Yellow fever disease is diagnosed based on symptoms, physical findings, laboratory testing, and the possibility of exposure to infected mosquitoes. There is no specific treatment for yellow fever; care is based on symptoms. Steps to prevent yellow fever include use of insect repellent, protective clothing, and vaccination. Yellow fever occurs in tropical regions of Africa and in parts of South America. Yellow fever is a very rare cause of illness in U.S. travelers. The last epidemic of yellow fever in North America occurred in New Orleans in 1905.

Zika: costs of prevention and control

They undertook a modelling study based on six states in the US in areas that are at risk of Zika emergence. The main finding of this study was that the total cost of Zika in these sates had a range that went from approximately 183.4 million dollars to 1.2 billion dollars.

6 Jul 2017

ISU entomologist urges summertime precautions against mosquitoes and ticks

Ryan Smith, an assistant professor of entomology at Iowa State University is encouraging Iowans to take precautions this summer when spending time outdoors in areas commonly populated by mosquitoes and ticks, which can transmit West Nile virus and other diseases that can have serious or potentially fatal outcomes.

22 Jun 2017

Study shows insecticide-resistance monitoring as key to controlling mosquitoes that spread Zika

One of the most common insecticides used in the battle against the Aedes aegypti mosquito has no measurable impact when applied in communities where the mosquito has built up resistance to it, a study led by Emory University finds.

20 Jun 2017

IU study may explain how Wolbachia bacterium prevents mosquitoes from transmitting deadly diseases

A new study from Indiana University may explain how a bacterium called Wolbachia prevents mosquitoes from transmitting deadly diseases such as dengue fever, West Nile virus and Zika.

16 Jun 2017

Grifols provides Procleix Zika Virus Assay to screen blood donations in countries that accept products with CE marking

Grifols, one of the world’s leading producers of plasma-derived medicines, now provides European countries accepting products with the CE marking with a test to detect the presence of the Zika virus in donated blood. CE marking means a product conforms to relevant legislation for sale in the European economic area.

29 May 2017

WHO announces new flagship programs for African region over next two years

The World Health Organization’s Regional Director for Africa announced today four new flagship programs for the region over the next two years, including a major push on adolescent health and the creation of regional emergency hubs.

26 May 2017

Chikungunya, dengue, and Zika viruses: three viruses in one mosquito

The study published in Nature Communications on May 19 found that Aedes aegypti, the primary mosquito that carries the Zika virus, might also transmit chikungunya and dengue viruses with one bite.

22 May 2017

Study findings shed new light on coinfection with chikungunya, dengue or Zika viruses

A new study led by Colorado State University researchers found that Aedes aegypti, the primary mosquito that carries Zika virus, might also transmit chikungunya and dengue viruses with one bite.

19 May 2017

Researchers develop simple urine-based test for rapid and accurate detection of Zika virus

There is no vaccine. No medication. And, no quick, reliable test for Zika virus … until now. Babies born with the virus often have lifelong, devastating birth defects.

15 May 2017

Researchers show how dengue virus employs multiple tactics to evade immune detection

For the human body to mount an immune response to a viral infection, host cells must identify the viral invader and trigger a signaling pathway. This signal then prompts the immune system to attack and subdue the pathogen.

19 Apr 2017

KU Leuven-led consortium to develop new vaccine that protects against rabies and yellow fever

Rabies and yellow fever claim ten thousands of lives each year. Vaccines already exist but various drawbacks that hinder their efficient distribution.

4 Apr 2017

WHO deployed 3.5 million doses of vaccine in response to yellow fever outbreak in Brazil

In response to the yellow fever outbreak currently on-going in Brazil some 3.5 million doses of vaccine from the emergency stockpile were deployed to the country through the International Coordinating Group (ICG) on Vaccine Provision for yellow fever.

3 Apr 2017

Study offers new insights into transmission of dengue infections

Transmission of the mosquito-borne dengue virus appears to be largely driven by infections centered in and around the home, with the majority of cases related to one another occurring in people who live less than 200 meters apart, new research led by the Johns Hopkins Bloomberg School of Public Health and the University of Florida suggests.

25 Mar 2017

Review of research on wild primates underscores importance of super-spreaders in disease transmission

An extensive review of research on wild primate social networks and parasites underscores the importance of super-spreaders, or central individuals that play an outsized role in transmission of a pathogen.

21 Mar 2017

Natural immune molecule shows protective effect against Zika virus in mouse, monkey models

A molecule naturally produced by the immune system protects mice and monkeys against Zika virus infection, an international team of researchers has found.

14 Mar 2017

New method can precisely track replication of yellow fever virus in host immune cells

Researchers from Princeton University's Department of Molecular Biology have developed a new method that can precisely track the replication of yellow fever virus in individual host immune cells.

14 Mar 2017

New predictive model identifies many potential Zika virus vectors

Zika virus could be transmitted by more mosquito species than those currently known, according to a new predictive model created by ecologists at the University of Georgia and the Cary Institute of Ecosystem Studies.

28 Feb 2017

Researchers explore ways to tamper reproductive events in dengue- and Zika-spreading mosquito

The mosquito Aedes aegypti, which can spread dengue fever, chikungunya, Zika fever, and yellow fever virus, requires a blood meal to develop eggs.

22 Feb 2017

Researchers identify molecular signatures to predict efficacy of malaria vaccines

The acid test for a vaccine is: "Does it protect people from infection?" Emory Vaccine Center researchers have analyzed this issue for a leading malaria vaccine called RTS,S, and their results have identified candidate signatures, or biomarkers, in the blood of vaccinated subjects which predict the likelihood of success from vaccination.

13 Feb 2017

Researchers find high-resolution structure of immature Zika virus

Researchers at Purdue University have determined the high-resolution structure of immature Zika virus, a step toward better understanding how the virus infects host cells and spreads.

10 Jan 2017