Major metacestodes in small ruminants slaughtered at Dessie municipal abattoir, Eastern Ethiopia: prevalence, cyst viability, organ distribution and economic implications

Abstract

Present study was undertaken to estimate the prevalence, cyst viability, organ distribution and economic importance of major metacestodes in sheep and goats at Dessie municipal abattoir during the period between November 2011 and March 2012. Visceral organs in 930 slaughtered small ruminants (510 sheep and 420 goats) were examined during the study period, and economic losses were estimated based on the condemnation of organs infested by metacestodes. Out of 510 randomly selected slaughtered sheep, 45.69, 8.43 and 9.02 % were infected with Cysticercus tenuicollis, Cysticercus ovis and hydatid cysts, and of 420 randomly selected slaughtered goats, 72.38, 8.57, 1.90 % were infected with C. tenuicollis, C. ovis and hydatid cysts, respectively. In slaughtered sheep, the major organs infested with C. tenuicollis, C. ovis and hydatid cysts were the omentum (33.92 %), heart (6.78 %) and lung (4.31 %), respectively. Similarly in goats, the omentum (34.52 %), heart (1.90 %) and lung (0.95 %) were the most infested organs with C. tenuicollis, C. ovis and hydatid cysts, respectively. The only major risk factor observed was for C. tenuicollis prevalence which varied significantly with age both in sheep (P<0.01, odds ratio (OR)=2.5) and goats (P<0.01, OR= 2.78). The viability of hydatid cyst (44.94 % sheep and 33.33 % goats) was higher than that of C. tenuicollis (33.22 % sheep and 24.96 % goats) in both small ruminants and C. ovis in sheep (38.59 %). The direct economic losses by organ condemnation due to metacestodes in small ruminants slaughtered at Dessie municipal abattoir were estimated to be 178,693.04 US dollar (USD) (3,284,378.29 Ethiopian Birr (ETB)). These results suggest that the high prevalence of metacestode infestations in this area is a great concern for both medical and veterinary authorities to design therapeutic and preventive programmes to overcome this problem.

Cysticercosis in Small Ruminants Slaughtered in Aswan Slaughterhouse, Egypt

“…The only predilection seats of Cysticercus ovis were in the heart of sheep (100%). This was agreed with Hashemnia et al (2016), Gessese et al (2015) in Ethiopia, Zheng (2016) in China.…”

“…The difference between the infection rate of omentum and other organs was very highly significantly associated (P<0.0001). This is in agreement with Gessese et al (2015), Abu-Elwafa and Al-Araby (2008), Radfar et al (2005), Wondimu et al (2011), Biu andMurtala (2012), Omar et al (2016), Abdulatif et al (2015), Fahmi (2014). While Mirzaei and Rezaei (2015) found that the liver wasthe highest infection rate for C.tenuicollis in slaughtered sheep and goats (1.64%) and (2%), respectively.…”

Prevalence of echinococcosis and Taenia hydatigena cysticercosis in slaughtered small ruminants at the livestock-wildlife interface areas of Ngorongoro, Tanzania

“…Cysticercus tenuicollis and hydatid cyst are larval stages of the canine tapeworm Taenia hydatigena and Echinococcus granulosus , respectively. The two cestodes are found in a large number of hosts throughout the world [ 2 - 5 ]. The cystic echinococcosis (also called hydatidosis) and T. hydatigena cysticercosis (due to C. tenuicollis) are widespread parasitic diseases infecting a large number of wild and domestic animals and humans and are considered as one of the major causes of economic losses and productivity of livestock in both the developing and industrialized world [ 6 - 8 ].…”

Prevalence of some zoonotic parasitic affections in sheep carcasses in a local abattoir in Cairo, Egypt

“…On the other hand, 0.47% of the examined lung samples appeared to be affected with hydatidosis. Furthermore, Table (9) showed that the annual economic losses for total or partial condemnation of the affected parts were 978 and 3402 L.E. due to hydatidosis during 2017 and 2018, respectively.…”