Tag Archives | Transmission

Don’t Panic Yet, But Ebola Could Go Airborne

Picture: Dr. Lyle Conrad/CDC (PD)

Via ScienceNews:

The Ebola virus can spread through the air from pigs to macaques, a new study suggests.

Transmission of the virus — which causes an often fatal hemorrhagic fever in people and primates — was thought to require direct contact with body fluids from an infected animal or person. But in the new study, published online November 15 in Scientific Reports, piglets infected with Ebola passed the virus to macaques housed in the same room even though the animals never touched.

“The evidence that the virus got from a pig to a monkey through a respiratory route is good,” says Glenn Marsh, a molecular virologist at the Commonwealth Scientific and Industrial Research Organization’s Animal Health Laboratory in Geelong, Australia. Marsh was not involved in the new study but has investigated Ebola and other viruses in pigs.

Although pigs transmitted Ebola in the laboratory, there is still no evidence that anyone has been sickened from contact with infected pigs in Africa, where the virus occurs naturally, or that the virus passes through the air under normal conditions, says study coauthor Gary Kobinger, an infectious disease researcher at the University of Manitoba in Winnipeg, Canada.

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Drugs Help ‘Reduce’ HIV Transmission

HIV-1 particles assembling at the surface of an infected macrophage.

HIV-1 particles assembling at the surface of an infected macrophage.

BBC News reports:

An HIV-positive person who takes anti-retroviral drugs after diagnosis, rather than when their health declines, can cut the risk of spreading the virus to uninfected partners by 96%, according to a study.

The United States National Institutes of Health sampled 1,763 couples in which one partner was infected by HIV.

It was abandoned four years early as the trial was so successful. The World Health Organization said it was a “crucial development”.

The study began in 2005 at 13 sites across across Africa, Asia and the Americas.

HIV-positive patients were split into two groups. In one, individuals were immediately given a course of anti-retroviral drugs. The other group only received the treatment when their white blood cell count fell.

Both were given counselling on safe sex practices, free condoms and treatment for sexually transmitted infections. Among those immediately starting anti-retroviral therapy there was only one case of transmission between partners.

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