Behablom  Meharenet, Mintesnot  Tsegaye, Tafese  Hailemariam, Kumela  Lelisa, 
    Epidemiology of Trypanosomosis in Domestic Ruminants and Donkeys in Asosa Zone,
Northwestern Ethiopia: Prevalence and Vectors Involved,
    Veterinary Research,
    Volume 13,Issue 4,
    2020,
    Pages 62-68,
    ISSN 1993-5412,
    vr.2020.62.68,
    (https://makhillpublications.co/view-article.php?doi=vr.2020.62.68)
    Abstract: African animal trypanosomosis is among the
most serious livestock diseases alleviating food
sufficiency in Sub-Saharan Africa. Accurate information
related to the prevalence, vectors distributions and
densities have of great importance in designing the
appropriate control and interventions strategies to combat
trypanosomosis and its vectors. This study aimed to
generate a base line data to implement the trypanosomosis
and tsetse control operations. A cross-sectional involved
dark phase ground buffy coat technique and deployments
of baited traps was conducted from November 2014 to
March 2015 in Asosa and Bambasi districts of Asosa
Zone, Northwestern Ethiopia. Positive samples were
stained by Giemsa’s in thin blood smears, fixed with
methanol for 5 min and examined under oil immersion
using 100× objectives to identify the species of
trypanosomes. Glossina morsitans submorsitans was the
only caught tsetse fly species with an apparent density of
5.77 fly/trap/day. Among 42 <i>G. m. submorsitans</i>
dissected, five (11.90%) were found to harbor
<i>T. congolense</i> (9.52%) and <i>T. vivax</i> (2.38%). The
prevalence of trypanosomosis was significantly higher
in cattle (8.55%) than in donkeys (2.35%), goats (1.68%)
and sheep (0.00%). In all infected study animals,
<i>T. congolense</i> was the dominant trypanosome species
(97.32%); <i>T. vivax</i> accounts 2.68% of the total infections.
The mean PCV in trypanosome-infected animals was
lower than in uninfected ones. African animal
trypanosomosis is an important threat to animal health in
the studied area and is not only a disease of concern in
cattle but also in goats and donkeys. To this end,
sustained interventions of trypanosomosis and its vectors,
considering the epidemiological importance of cattle,
small ruminants and equines is a prerequisite for the
enhancement of livestock production in the areas where
tsetse fly and trypanosomosis is prevalent.
    Keywords: Asosa;Bambasi;domestic ruminants;donkeys;trypanosomosis;vectors