1793 Philadelphia yellow fever epidemic the origin of the fever nor that it was transmitted by mosquitoes (which was not verified until the late nineteenth century). The mayor and a committee of two dozen organized a fever hospital at Bush Hill and other crisis measures. The assistance of the Free African Society was requested by the city and readily agreed to by the members, based on the mistaken assumption that native Africans would have the same partial immunity to the new disease as many had to malaria, the most common source of fever epidemics during the summer months. Black nurses aided the sick and the
Rat-bite fever underarm. Symptoms generally appear within 2 to 10 days of exposure to the infected animal. It begins with the fever and progresses to the rash on the hands and feet within 2 to 4 days. Rash appears all over the body with this form, but rarely causes joint pain. Two types of Gram-negative, facultatively anaerobic bacteria can cause the infection. Rat-bite fever transmitted by the Gram-negative coiled rod "Spirillum minus" (also known as "Spirillum minor") is more rare, and is found most often in Asia. In Japan, the disease is called "sodoku". Symptoms do not manifest for two to four