Hydatidosis is a zoonotic disease that occurs throughout the world and causes considerable economic losses and public health problems in many countries. A cross sectional study was carried out among cattle and sheep from October 2017 to April 2018 at Harar municipal abattoir with the aim to determine prevalence of hydatidosis, consider fertility and viability of the recovered cysts and compare liver and lung involvement with hydatid cyst. Totally, 484 animals were selected randomly, among these 304 were cattle and 180 were sheep and the reason for unbalanced sample size of sheep and cattle were due to low availability of the sheep i.e. majority of slaughtered animal was cattle. Out of 484 animals 77(15.9%) harbored one or more cyst(s) in single or more organs. The total prevalence in current study was 15.9% and the occurrence of hydatidosis in cattle was 15.1% and in sheep 17.2% was recorded. Body condition score, sex related infection were significant since, poor body condition and female were most infected (P<0.05). But insignificant difference was detected with regard to age, origin and species of animals (P>0.05) on prevalence of hydatidosis. Among examined carcass, the cysts were distributed in lungs, liver, heart, spleen, kidneys and both lung and liver. Among the examined cattle, 46 cattle that were positive, 29 (63.0%) had cysts in the lungs, 0(0%) in kidney, 14 (30.4%) in liver, 2(4.3%) in spleen. whereas, the rest of 1(2.3%) in heart infections involved organs while of 31 sheep positive, 11(35.5%) had cysts in lungs, 18(58.1%) in liver, 0(0%) in lung and liver, 1(3.2%) in spleen, 0(0%) in heart and 1(3.2%) in kidney. In general, based on organ distribution, hydatid cyst was found to be 51.9%, 41.6%%, 1.3%, 3.9%, 1.3%, in lungs, liver, heart, spleen and kidney respectively. From 135 of the total cysts examined, 51 cysts were fertile, 76(56.3%) were sterile and 8(5.925%) were calcified. Out of 51 fertile cysts that obtained from lung and liver were tested for viability, (37.8%) cysts were viable and 43.1% were non-viable). The prevalence of hydatidosis revealed that was among the major significant diseases needing special considerations to prevent and control in study area not only for animal population but also for humans at risk of contracting the infection.
Keywords: Cattle, Harar Municipal Abbatoir, Hydatidosis, Prevalence, Sheep.