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HIV

A series of autopsies performed in an infectious disease hospital in the Brazilian Amazon reveals that infections by the Histoplasma fungus are a major cause of death in people with HIV. The study, led by Barcelona Institute for Global Health (ISGlobal), kidney imaging flow with iv lasix an institution supported by ‘la Caixa’ Foundation, in collaboration with a team in Manaus, highlights the need of implementing sensitive methods to detect these infections in Histoplasma-endemic regions.

Histoplasmosis is a lung infection caused by inhalation of spores from a fungus (Histoplasma), and is frequent in some areas of the US, Africa, and Latin America.

In the majority of individuals with a functional immune system, the infection causes mild symptoms. However, in people who are immuno-compromised, such as people with HIV, the infection can disseminate to other parts of the body and, if not treated, lead to death.

“The problem is that the precise burden of the disease in endemic regions is not known, since its symptoms are frequently mistaken for tuberculosis,” says Miguel Martinez, ISGlobal researcher and stud coordinator. In the framework of the CaDMIA project—which developed and validated a minimally invasive autopsy method—the ISGlobal team, in collaboration with Brazilian researchers, performed a series of complete autopsies in 61 patients who died in a Manaus hospital specialized in tropical diseases.

Using microscopic and molecular techniques, the research team found evidence of Histoplasma infection in one out of three deceased individuals. In a high percentage of cases, all of which were HIV-positive, the infection was disseminated and had severely damaged other organs. In addition, genomic sequencing of the isolates suggests a high diversity of Histoplasma strains circulating in the area.

“Despite the high mortality due to histoplasmosis, 75% of the cases were not clinically suspected,” says Natalia Rakislova, first author of the study.

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