Abstract
A cross sectional and retrospective studies were conducted from November 2010 to April 2011 to determine the prevalence and characteristics of hydatid cysts in cattle slaughtered at Gondar Elfora Abattoir in northern Ethiopia. Out of the 308 cattle examined for the presence of hydatid cysts, 63 (20.5%) of them were found harboring hydatid cysts in one or more of their internal organs. Results of the study showed higher (P<0.05) prevalence of cystic echinococcosis in adult (22.4%; 49/219) than in young (15.7%; 14/89) cattle. Lowest prevalence of hydatid cysts was observed in cattle from Debark (7.7%; 2/26) whereas highest prevalence of cystic echinococcosis was recorded in cattle from Fogera (28.2%; 11/39). The lungs (69.3%; 61/88) were the most affected organs followed by the livers (28.4%; 25/88). A total of 230 hydatid cysts from different internal organs of 63 infected cattle were differentiated into 60.4% calcified, 30% fertile and 9.6% sterile cysts. Likewise, a total of 13% (30/230) small, 15.6% (36/230) medium, and 10.9% (25/230) large hydatid cysts were recorded. Lung harbored the highest overall count (76.9%; 177/230) and greatest proportion of large size cysts (13.5%; 103/177) than all the other organs. Liver harbored the highest proportion of calcified cysts (68%; 34/50). An overall proportion of 30% (69/230) fertile cysts were recorded. The greatest proportion of fertile cysts (33.3%; 59/177) was recorded in lungs followed by the livers (20%; 10/50). A retrospective data of 5years (2004/5-2009/10) revealed an overall prevalence of 30.4% (9,106/29,951) and highest overall prevalence of 65.5% hydatid cysts in the lungs followed by livers (33.5%) and least in spleen (0.04%). In conclusion the findings reported herein show that cystic echinococcosis is widespread in cattle slaughtered in Gondar export Abattoir and suggests that the lung is the most important source of hydatid cysts for definitive hosts in the area.
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