Survey of bovine fasciolosis burdens in trade cattle slaughtered at abattoirs in North-central Nigeria: The associated predisposing factors and economic implication

摘要

Fasciolosis, transmitted by fresh water snails, Lymnae, is an important parasitic zoonotic disease caused by liver flukes of the genus Fasciola, with two important species, Fasciola hepatica and F. gigantic (Andrews, 1999; Mas-Coma et al., 2005). Fasciolosis has the largest geographical widespread of any emerging vector-borne zoonosis, occurring in > 51 countries worldwide. The complex nature of the epidemiology of this snail-borne disease presents challenges for disease management and animal husbandry (Mas-Coma et al., 2009). Gretera et al. (2016) reported a baseline bovine fascioliasis prevalence of 41.9% and higher prevalence of 46.0% at 6-month post-treatment follow-up at the Lake Chad, with increment associated with re-infection due to mobile animal husbandry system. Fasciola hepatica is mainly distributed in temperate regions such as Europe, the Americas, and Australia, with limited distribution of its intermediate host Lymnaea (Galba) truncatula, while F. gigantic is more prevalent in tropical countries being adapted to warmer conditions likely due to the wide distribution of its intermediate host Lymnaea (Radix) natalensis, and both species have been found in sub-Saharan Africa and Asia (Walker et al., 2008; Mas-Coma et al., 2009; Kanyari et al., 2010).