At a conference on tropical medicine, scientists from the CDC shared their findings on the human-to-human transmission of a puzzling virus, the Chapare virus. In a Bolivian hospital, he killed three people suffering from symptoms similar to Ebola.
In a hospital in La Paz, Bolivia, several people were treated for onehemorrhagic. It is not that torments these patients, but another what causes similar: Chapare virus. Five people who came into contact with these patients were in turn infected, including a physician assistant, a and a gastroenterologist in the hospital. Two of them died from this infection.
and constitutes the first description of the human-to-human transmission of the Chapare virus. This case was the subject of a presentation by scientists from (Centers for Disease Control and Prevention) during the last congress of the , that is now being held. Scientists are particularly concerned about the spread of this virus, of which little has been described.
Virus recurrence observed in 2004
The first confirmed case of infectiondates back to 2004 in a municipality in the province of Chapare, from which it takes its name, east of La Paz. It belongs to the genre Arena virus, which groups viruses , originally shrouded in hemorrhagic fever, such as Lhasa fever. The Ebola virus does not belong to this genus, it is one Ebola virus from the family of Filoviridae. Diseases caused by Arena virus are sometimes referred to as New World Fevers. The infected patients suffered from fever, abdominal pain, vomiting and bleeding gums. There is no specific treatment.
Chapare virus is transmitted by biological fluids (blood, urine,, ) contaminated. It appears that the doctor’s assistant was infected by sucking up the saliva of an infected patient. The presence of the virus RNA in the semen of an infected patient who survived for 168 days after infection raises the question of sexual transmission. All Chapare virus transmission routes still remain 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. To bewas isolated from small , pygmy paddy field rats (genus Oligoryzomys). They were found near the place of life of the first patient infected during the 2019 epidemic. Therefore, we cannot be sure that humans have become infected through contact with these animals, as the presence of the virus genome does not attest to its ability to be contagious, but it is a valuable clue.
Scientists are now working on tests ofsince the disease is poorly understood, it can easily be confused with others. Since this case in 2019, other Chapare virus infections have been reported, including one involving a child. Scientists follow the evolution of .