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.

Chapare virus, a newly discovered arenavirus

A team of Bolivian health authorities, U.S. Navy health experts based in Lima, Peru, and the U.S. Centers for Disease Control and Prevention has characterized "Chapare arenavirus," a previously unrecognized arenavirus, discovered in serum samples from a patient in rural Bolivia who eventually died of the infection.

17 Apr 2008

Mosquito mating mechanism could lead to new attack on dengue and yellow fever

Cornell researchers have identified a mating mechanism that possibly could be adapted to prevent female mosquitoes from spreading the viruses that cause dengue fever, second only to malaria as the most virulent mosquito-borne disease in the tropical world.

11 Apr 2008

Solanum villosum - berries from Indian weed - may keep mosquitoes at bay

Mosquitoes responsible for spreading disease are increasingly becoming resistant to synthetic insecticides.

3 Apr 2008

Chikungunya virus appears seldom to harm infants of mothers infected early in pregnancy

Chikungunya virus, an infectious agent transmitted by mosquitoes, appears seldom to harm infants of mothers infected early in pregnancy, but can frequently cause serious problems, including lasting brain injury, in babies born to mothers who acquire the virus near the time of delivery, according to a study in PLoS Medicine.

18 Mar 2008

Sanofi Pasteur helps tackle yellow fever in Latin America

Sanofi Pasteur, the vaccines division of the Sanofi-aventis Group, has announced that six million doses of Stamaril yellow fever vaccine have been shipped upon UNICEF's request to respond to the yellow fever epidemic in Latin America.

27 Feb 2008

Paraguay confirms 5 cases of yellow fever

Health authorities in Paraguay have confirmed 5 cases of yellow fever in the Department of San Pedro.

20 Feb 2008

Jungle Yellow Fever in south America

Yellow fever is a zoonosis of the tropical regions of South America and Africa, which occurs in two distinct epidemiologic cycles: jungle and urban.

13 Feb 2008

New international health regulations now in force

New International Health Regulations (IHR)-designed to halt the international spread of dangerous diseases and other threats-are now in force, with the chief aim of reducing the time it takes to identify an illness or other public health threat-including chemical and radiological hazards-that could have an international impact, in order to mobilize a more timely and effective response.

7 Jan 2008

New understanding of malaria mosquito's olfactory system

By mapping a specialized sensory organ that the malaria mosquito uses to zero in on its human prey, an international team of researchers has taken an important step toward developing new and improved repellants and attractants that can be used to reduce the threat of malaria, generally considered the most prevalent life-threatening disease in the world.

30 Aug 2007

WHO says more killer diseases like AIDS on their way

The World Health Organisation (WHO) has warned the world to expect a new killer disease to emerge in the next few years which will threaten the lives of millions.

23 Aug 2007

Lab-grown disease-free mosquito

A decade ago, scientists announced the ability to introduce foreign genes into the mosquito genome.

18 Jul 2007

Biologist hopes mosquito can break viral chain

Most people do their best to avoid mosquitoes. But this summer Rollie Clem will play the wary host to his own homegrown swarm of Aedes aegypti, the yellow fever mosquito. He's made a room ready for them, and even a menu.

22 May 2007

First draft of the genome sequence of Aedes aegypti mosquito

Developing new strategies to prevent and control yellow fever and dengue fever has become more possible with the completion of the first draft of the genome sequence of Aedes aegypti mosquito by scientists led by Vishvanath Nene at The Institute for Genomic Research (TIGR) and David Severson at the University of Notre Dame.

18 May 2007

Vaccination week in the Americas

The countries of the Americas are preparing a huge promotional effort for the fifth year of Vaccination Week in the Americas, which this year aims to immunize some 55 million persons.

18 Apr 2007

GAVI Alliance brings immunisation rates to record highs in poor countries

New data from the World Health Organization (WHO) show that the GAVI Alliance, a groundbreaking global initiative to increase access to children's vaccines, has brought immunisation rates to record highs in poor countries.

28 Jan 2007

Global resurgence in zoonotic viral diseases

Doctors and veterinarians need to work together to tackle the increasing global threat of zoonotic viral diseases spread by non-human vertebrate hosts - including dogs, cattle, chickens and mosquitoes - according to a review in the November issue of Journal of Internal Medicine.

8 Nov 2006