Nagana


Nagana

Nagana, also called nagana pest or Animal African Trypanosomiasis, is a disease of vertebrate animals. The disease is caused by trypanosomes of several species in the genus "Trypanosoma". The trypanosomes infect the blood of the vertebrate host, causing fever, weakness, and lethargy which lead to weight loss and anemia; in some animals the disease is fatal unless treated. The trypanosomes are transmitted by tsetse flies. [http://www.who.int/mediacentre/factsheets/fs259/en/]

An interesting feature is the remarkable resistance to nagana pathology shown by some breeds of cattle, notably the N'dama - a West African "Bos taurus" breed. This contrasts with the susceptibility shown by East African "Bos indicus" cattle such as the zebu. [cite journal |author=Courtin D, Berthier D, Thevenon S, Dayo GK, Garcia A, Bucheton B |title=Host genetics in African trypanosomiasis |journal=Infect. Genet. Evol. |volume=8 |issue=3 |pages=229–38 |year=2008 |month=May |pmid=18394971 |doi=10.1016/j.meegid.2008.02.007] Most wild African animals are also resistant.Fact|date=February 2007

This disease is the animal counterpart of sleeping sickness, also known as Human African Trypanosomiasis.

Nagana and history

The nagana pest disease has had a significant effect on African history, by keeping horses and camels (and thus cavalry and mounted knights and mounted messengers) out of much of Africa.Fact|date=February 2007 One main effect was in stopping the southward advance of Islam at the northern limit of tsetse fly country.Fact|date=February 2007 Another effect is that it is probable that the southward spread of the Bantu/Nguni peoples had to wait until their cattle evolved to become resistant to nagana.Fact|date=February 2007

References

Further reading


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  • Nagana — ist eine in Afrika auftretende Tierseuche, die die Viehhaltung im afrikanischen „Tsetsegürtel“ (14° N bis 29° S[1]) wesentlich einschränkt und durch Trypanosomen verursacht wird. Sie wird durch die Tsetsefliege übertragen. Trypanosoma brucei… …   Deutsch Wikipedia

  • nagana — NAGÁNA s. f. boală a erbivorelor din Africa tropicală, provocată de musca ţeţe. (< fr. nagana) Trimis de raduborza, 15.09.2007. Sursa: MDN …   Dicționar Român

  • nagana — {{/stl 13}}{{stl 8}}rz. ż Ia, CMc. nagananie {{/stl 8}}{{stl 7}} ustne lub pisemne upomnienie za wykroczenie, złe zachowanie, niewywiązywanie się z obowiązków itp. : {{/stl 7}}{{stl 10}}Nagana służbowa, publiczna, surowa, ostra. Otrzymać, dostać… …   Langenscheidt Polski wyjaśnień

  • Nagana — Na*ga na (n[.a]*g[aum] n[.a]), n. [Prob. native name.] (Med.) A disease of horses and other domestic animals, transmitted by the tsetse fly; any trypanosomiasis, especially the variety caused by {Trypanosoma brucei}. [South Africa] [Webster 1913… …   The Collaborative International Dictionary of English

  • Nagana — Nagana, s. Trypanosomen …   Meyers Großes Konversations-Lexikon

  • Nagana — Nagana, die Tsetsekrankheit (s. Tsetse) …   Kleines Konversations-Lexikon

  • nagana — s. f. Doença do sono na África Austral …   Dicionário da Língua Portuguesa

  • nagana — nàgana ž DEFINICIJA pat. zarazna bolest kopitara i drugih sisavaca u Africi koju prenosi ce ce muha ETIMOLOGIJA engl. ← zulu unukane …   Hrvatski jezični portal

  • nagana — [nə gä′nə] n. [< Zulu u(lu) nakane] an infectious disease affecting horses and cattle in tropical Africa, caused by a trypanosome (Trypanosoma brucei) transmitted by the bite of infected tsetse flies …   English World dictionary

  • Nagana — Na|ga|na 〈f. 10; unz.〉 eine afrikan. Viehseuche [Zuluspr., „Viehseuche“] * * * Nagana   [afrikanisch] die, , Ngana, Tsetsekrankheit, in Afrika, besonders südlich der Sahara, verbreitete, oft seuchenhafte, mit Fieber, Anämie und Entkräftung… …   Universal-Lexikon