Tuesday , August 16 2022

Scientists in Bolivia are bothered by a strange virus



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At a tropical medicine conference, scientists at the CDC shared their findings on the transmission of enigmatic virus, Chapare virus, between humans and humans. In a Bolivian hospital, he killed three people suffering from Ebola-like symptoms.

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[EN VIDÉO] What are the differences between bacteria and viruses?
They are microbes. They are very small and we confuse them quite easily. However, bacteria and viruses are two very different things. And to fight effectively against the causes of disease, it is best to identify them clearly.

At a hospital in La Paz in Bolivia, several people were treated for a fever hemorrhagic. I am not Ebola disease that torments these patients, yet another virus which causes symptoms similar: Chapare virus. Five people in contact with these patients were in turn infected, including a medical intern, and paramedic and a hospital gastroenterologist. Two of them died from this infection.

It happened in 2019 and forms the first description of human-to-human transmission of the Chapare virus. This case was the subject of a presentation by scientists from Communicable Disease Control (Centers for Disease Control and Prevention) during the last congress of theAmerican Tropical Medicine and Hygiene Association, that is currently under way. Scientists are particularly concerned about the spread of this virus, very little is still described.

A virus seen in 2004 was returned

The first confirmed case of infection in Chapare virus dating from 2004 in a community in the province of Chapare, which gave it its name, east of La Paz. It belongs to the genre Arenavirus, which groups viruses together ARN, originally covered in hemorrhagic fever, such as Lhasa fever. The Ebola virus does not belong to this genus, it is a Ebola virus of a family Filoviridae. Diseases caused by Arenavirus sometimes called New World fever. The infected patients suffered from fever, pains abdominal pain, vomiting and gums. No specific treatment exists.

Chapare virus is transmitted by biological fluids (blood, urine, saliva, sperm) contaminated. The medical intern appears to be contaminated by sucking the saliva of an infected patient. The presence of the virus’s RNA in the semen of an infected patient who survived another 168 days after infection raises the question of sexual transmission. All Chapare virus transmission pathways are still foggy.

An emerging infectious disease under surveillance

Caitlin Cossaboom, an epidemiologist at the CDC, has conducted research to identify the natural reservoir of the Chapare virus. His genome isolated from small rodents, rice paddy rice rats (genus Oligoryzomys). They were discovered near the scene of the first infected patient during the epidemic outbreak in 2019. This does not allow us to be certain that humans have been infected by contact with these animals, due to the presence of a genome the virus does not testify to its ability to be contagious, but it is a valuable clue.

Scientists are now working on tests of diagnosticas the disease is not adequately understood, it is easy to mix with others. Since this 2019 outbreak, other Chapare virus infections have been reported, including one involving a child. Scientists are following evolution this emerging infectious disease.

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