'' as found in a
Rhinoceros viper sold for human consumption Animal sources may have been the cause for infectious diseases such as
tuberculosis,
leprosy,
cholera,
smallpox,
measles,
influenza, and
syphilis acquired by early agrarians. The emergence of
HIV-1,
AIDS,
Ebola virus disease, and
Creutzfeldt-Jakob disease are attributed to animal sources today. Outbreaks of the Ebola virus in the
Congo Basin and in
Gabon in the 1990s have been associated with the butchering and consumption of
chimpanzees and
bonobos.
Anthrax can be transmitted when butchering and eating ungulates. The risk of
bloodborne diseases to be transmitted is higher when butchering a carcass than when transporting, cooking and eating it. Many hunters and traders are not aware of
zoonosis and the risks of disease transmissions. An interview survey in rural communities in Nigeria revealed that 55% of the respondents knew of
zoonoses, but their education and cultural traditions are important drivers for hunting and eating bushmeat despite the risks involved.
HIV Results of research on wild chimpanzees in Cameroon indicate that they are naturally infected with the
simian foamy virus and constitute a reservoir of HIV-1, a precursor of the
acquired immunodeficiency syndrome (AIDS) in
humans. There are several distinct strains of HIV, indicating that this cross-species transfer has occurred several times.
Simian immunodeficiency virus present in chimpanzees is reportedly derived from older strains of the virus present in the
collared mangabey (
Cercocebus torquatus) and the putty-nosed monkey. It is likely that HIV was initially transferred to humans after having come into contact with infected bushmeat.
Ebola The natural reservoirs of ebolaviruses are unknown. Possible reservoirs include non-human
primates, Between October 2001 and December 2003, five Ebola virus outbreaks occurred in the border area between Gabon and Republic of Congo. Autopsies of wildlife carcasses showed that chimpanzees, gorillas and bay duikers were infected with the virus. The Ebola virus has been linked to bushmeat, with some researchers hypothesizing that megabats are a primary host of at least some variants of Ebola virus. Between the first recorded outbreak in 1976 and the largest in 2014, the virus has
transferred from animals to humans only 30 times, despite large numbers of bats being killed and sold each year. Bats drop partially eaten fruits and pulp, then terrestrial mammals such as gorillas and duikers feed on these fruits. This chain of events forms a possible indirect means of transmission from the natural host to animal populations. The suspected
index case for the
Ebola virus epidemic in West Africa in 2014 was a two-year-old boy in
Meliandou in south-eastern Guinea, who played in a hollow tree harbouring a colony of
Angolan free-tailed bats (
Mops condylurus). Results of a study conducted during the Ebola crisis in Liberia showed that socio-economic conditions affected bushmeat consumption. During the crisis, there was a decrease in bushmeat consumption and daily meal frequency. In addition, preferences for bushmeat species stayed the same.
Parasites In Cameroon, 15 primate species were examined for
gastrointestinal parasites. Bushmeat primates were infected with
Trichuris,
Entamoeba,
Ascaris,
Capillaria,
pinworms,
Bertiella and
Endolimax nana. A large proportion of
Bitis vipers sold at rural bushmeat markets in the Democratic Republic of the Congo are infected by
Armillifer grandis, which represent a threat to public health. ==Management==