Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

New Finds on West Nile, Monkeypox and Yellow Fever

08.09.2004


Researchers from the University of Texas Medical Branch at Galveston (UTMB) present significant new discoveries on West Nile virus, monkeypox, and yellow fever in four papers in the September issue of Emerging Infectious Diseases, published by the Centers for Disease Control and Prevention. The articles are summarized below, and can be found on the EID web site at http://www.cdc.gov/ncidod/EID/index.htm.



• In “Year-Round West Nile Virus Activity, Gulf Coast Region, Texas and Louisiana,” West Nile authority Dr. Robert Tesh and colleagues from UTMB and the Harris County and Galveston County mosquito control offices present the first hard evidence that West Nile virus continues to circulate during winter along the Texas and Louisiana Gulf Coasts. This finding is important to understanding how the virus spreads when mosquito populations increase in the spring, both on the Gulf Coast and farther north where migrating birds can carry West Nile great distances.

• Tesh and his colleagues describe a possible new model for studying infections by monkeypox, a relative of the deadly smallpox virus, in “Experimental Infection of Ground Squirrels (Spermophilus tridecemlineatus) with Monkeypox Virus.” Although smallpox has been eradicated from the wild and under treaty is preserved only at a high-security CDC lab in Atlanta and a similar center in Russia, biodefense experts fear other samples of the virus may exist that could pose a grave threat to world health if they fell into the wrong hands, especially since smallpox vaccination is no longer common. Monkeypox affects monkeys in much the same way that smallpox affects humans; it can be used as a substitute for smallpox virus in studies that could lead to treatments for its much more dangerous relative. The discovery that it produces a similar disease in ground squirrels and that these rodents can be employed in experiments instead of monkeys should make such work substantially easier.


• UTMB researchers Dr. Stephen Higgs and Dr. Alan Barrett examine the dangers yellow fever still poses for Bolivian cities in “Yellow Fever Virus Infectivity for Bolivian Aedes aegypti Mosquitoes,” testing the idea that the urban areas of Bolivia have been protected from yellow fever outbreaks because the mosquitoes that live there cannot transmit the virus. Laboratory experiments, they report, show that mosquitoes collected in Santa Cruz, Bolivia in 2001 are quite effective at transmitting yellow fever virus—leaving open the question of why yellow fever outbreaks have not occurred there and in other Bolivian urban areas in recent years.

• Yellow fever is still a significant public health problem throughout Latin America, despite the existence of an effective vaccine. In “Genetic Divergence and Dispersal of Yellow Fever Virus, Brazil,” scientists from UTMB and the Instituto Evandro Chagras in Belém, Brazil, present a genetic analysis of 79 yellow fever virus samples taken in Brazil between 1935 and 2001, using it to track the development and dispersion of different strains of the virus. The data, they say, suggest that migration of infected people could be an important factor in virus dispersal. Unexpectedly, they also found that virus taken from a patient who died of yellow fever in 1975 was actually a vaccine strain, adding weight to recently raised concerns about adverse effects from use of the 17DD yellow fever vaccine, particularly in patients with weakened immune systems.

| newswise
Further information:
http://www.utmb.edu
http://www.cdc.gov/ncidod/EID/index.htm

More articles from Health and Medicine:

nachricht One gene closer to regenerative therapy for muscular disorders
01.06.2017 | Cincinnati Children's Hospital Medical Center

nachricht The gut microbiota plays a key role in treatment with classic diabetes medication
01.06.2017 | University of Gothenburg

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Can we see monkeys from space? Emerging technologies to map biodiversity

An international team of scientists has proposed a new multi-disciplinary approach in which an array of new technologies will allow us to map biodiversity and the risks that wildlife is facing at the scale of whole landscapes. The findings are published in Nature Ecology and Evolution. This international research is led by the Kunming Institute of Zoology from China, University of East Anglia, University of Leicester and the Leibniz Institute for Zoo and Wildlife Research.

Using a combination of satellite and ground data, the team proposes that it is now possible to map biodiversity with an accuracy that has not been previously...

Im Focus: Climate satellite: Tracking methane with robust laser technology

Heatwaves in the Arctic, longer periods of vegetation in Europe, severe floods in West Africa – starting in 2021, scientists want to explore the emissions of the greenhouse gas methane with the German-French satellite MERLIN. This is made possible by a new robust laser system of the Fraunhofer Institute for Laser Technology ILT in Aachen, which achieves unprecedented measurement accuracy.

Methane is primarily the result of the decomposition of organic matter. The gas has a 25 times greater warming potential than carbon dioxide, but is not as...

Im Focus: How protons move through a fuel cell

Hydrogen is regarded as the energy source of the future: It is produced with solar power and can be used to generate heat and electricity in fuel cells. Empa researchers have now succeeded in decoding the movement of hydrogen ions in crystals – a key step towards more efficient energy conversion in the hydrogen industry of tomorrow.

As charge carriers, electrons and ions play the leading role in electrochemical energy storage devices and converters such as batteries and fuel cells. Proton...

Im Focus: A unique data centre for cosmological simulations

Scientists from the Excellence Cluster Universe at the Ludwig-Maximilians-Universität Munich have establised "Cosmowebportal", a unique data centre for cosmological simulations located at the Leibniz Supercomputing Centre (LRZ) of the Bavarian Academy of Sciences. The complete results of a series of large hydrodynamical cosmological simulations are available, with data volumes typically exceeding several hundred terabytes. Scientists worldwide can interactively explore these complex simulations via a web interface and directly access the results.

With current telescopes, scientists can observe our Universe’s galaxies and galaxy clusters and their distribution along an invisible cosmic web. From the...

Im Focus: Scientists develop molecular thermometer for contactless measurement using infrared light

Temperature measurements possible even on the smallest scale / Molecular ruby for use in material sciences, biology, and medicine

Chemists at Johannes Gutenberg University Mainz (JGU) in cooperation with researchers of the German Federal Institute for Materials Research and Testing (BAM)...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Plants are networkers

19.06.2017 | Event News

Digital Survival Training for Executives

13.06.2017 | Event News

Global Learning Council Summit 2017

13.06.2017 | Event News

 
Latest News

Quantum thermometer or optical refrigerator?

23.06.2017 | Physics and Astronomy

A 100-year-old physics problem has been solved at EPFL

23.06.2017 | Physics and Astronomy

Equipping form with function

23.06.2017 | Information Technology

VideoLinks
B2B-VideoLinks
More VideoLinks >>>