<unk> , also known as<unk> 's black<unk>  and<unk>  hepatitis, is a lethal tropical viral infection discovered in the 1950s in the city of<unk> , in the Brazilian Amazon basi], where it occurs mostly in the area south of the Amazon River, in the states of Acre, Amazonas and Rondônia. The disease has also been diagnosed in Colombia and Peru. The similar form in Colombia has been named Santa Marta<unk> .
Its main manifestation is a fulminant hepatitis which may kill in less than a week, and which characteristically affects children and young adults, and more males than females. It is accompanied also by an encephalitis in many cases. The disease is highly lethal: in a study carried out in 1986 at Boca do Acre, also in the Amazon, 39 patients out of 44 died in the acute phase of the disease. Survivors may develop chronic disease.
Lábrea fever
Rat-bite fever
Hay fever
Cotton fever
Yellow fever
Trench fever
Blackwater fever
Chikungunya