[4] Brazilian mammarenavirus is one of the arenaviruses from South America to cause hemorrhagic fever.
[8] The first naturally occurring case was in 1990, when a female agricultural engineer who was staying in the neighborhood of Jardim Sabiá in the municipality of Cotia, a suburb of São Paulo, Brazil contracted the disease (The virus is also known as "Sabiá Virus").
[4][11] A fourth case, also naturally acquired in upstate São Paulo, was reported in January 2020.
[13] Ribavirin is thought to be effective in treating the illness, similar to other arenaviruses.
[4] Symptomatic control such as fluids to address dehydration and bleeding may also be required.