The howler monkeys of the island of Trinidad are falling prey to the yellow fever virus and could be vaccinated in order to protect tourists who approach them. In Sierra Leone the Lassa fever virus killed several people who had been contaminated by rats. The reservoir for the Ehrlichia bacteria would appear to be white-tailed deer. Humans can be fatally infected by bites from the black-legged tick or the lone star tick which live as parasites on these cervidae.
Bovine tuberculosis is still prevalent among the wild animals of all continents.
Baboons, which had fallen victim to the disease in previous years, have been affected by a fulminating form that has wiped out the infected groups. Tularemia remains a constant threat to hares in Europe, Northern Asia and the United States of America. In Estonia, an outbreak was reported in humans, in which the disease manifests itself as serious general disorders which can fortunately be cured by antibiotic treatment. Rinderpest , affecting buffalo, giraffe and antelope in the national parks of East Africa since 1994 has not spread as much as was feared, but the vaccination of domestic cattle living in the region appears to have reduced the spread of infection. Likewise, foot and mouth disease , previously reported among the impala antelope of South Africa's Kruger Park, appears to be dying out spontaneously.