Prevalence and Risk Factors of Ovine Hydatidosis In West Omdurman Locality-Sudan

Abstract

This study was conducted on 176 sheep slaughtered at Al-sabaloga abattoir, West Omdurman, Khartoum State, Sudan, during the period extended from October2016 to December 2016. The objectives were to estimate the prevalence of hydatid cysts in sheep and to investigate risk factors associated with the disease. Routine meat inspection procedure was employed to detect the presence of hydatid cysts in visceral organs (liver, lung, heart and muscle). The Examined sheep originated from two areas: Southern Kordofan, and White Nile. The overall prevalence was 2.8% . The prevalence of hydatid cysts infection according to age of sheep was 1.2% in animals equal or less than one years of age and 4.3% in animals of age more than one year. The prevalence of hydatid cysts infection according to grazing was 8.3% in close grazing and was 2.0% in open grazing systems .The distribution of the hydatid cysts according to the area (source) of sheep was 4.0% in Southern Kordofan, and 1.3% in White Nile. As for body condition the prevalence was 3.0% in good body condition and 0.0% in poor body condition. The prevalence of hydatidosis according to the breed of animals was 2.5% in Hamary ecotype and 3.2% in Kabashy breed. The distribution of the hydatid cysts according to the using of treatment was5.7% in animals which were using drugs and was 1.1% in animals which were not using drugs ,the prevalence of hydatid cysts infection according to the present of dogs was 1.7% in area where dogs were present and was 1.1% in area where dogs were not present. Liver is the most infected organ (4cysts), but there is one infection in muscle, and there is no cyst in heart and lungs. In microscopical investigation ;three cysts are found sterile, and two cysts are found fertile. The results of the univariate analysis by using the Chi-square for the following potential risk factors were: breed (P-value = 0.784), age of animal (p-value = 0.208), origin of animal (Pvalue = 0.288), body condition (p-value = 0.081), grazing (p-value =0.081), present of dog (p-value =0.669), and use of treatment (p-value =0.139). The multi variete analysis was not used because the result of univariate analysis showed that there is no significant association between hydatidosis with any of the investigated risk factors.