Why are you vomiting black?

Black vomit has two definitions. Black vomit can be a vomit which is dark and consists of digested blood along with gastric contents. A black vomit is a symptom for severe 'yellow fever'. This symptomatic black vomit is also called yellow jack or vomit Negro or American Plague. Yellow Fever, an acute viral disease gives rise to hemorrhagic conditions. Some parents are affected by Jaundice and hence, the name yellow fever. It has been a cause of many devastating epidemics.

This fever is caused by the mosquito species of Aedes simpsoni, Aedes africanus and Aedes aegypti. Haemagogus and Sabethes are other genera of mosquitos that transmit this disease from forest monkeys to human beings and further transmission. After incubation, symptoms like fever, headache and improper functioning of liver, kidneys, heart are seen. One such symptom is black vomit which is caused due to haemorrhage in the gastrointestinal tract.