tailieunhanh - Gastrointestinal nematodiasis with main emphasis on H.Contortus infection in small ruminants

Small ruminant farming serves as a major source of livelihood in rural areas where about 70% of the population is dependent on agricultural and livestock related activity. In spite of so high potential of these animals, production is significantly constrained due to disease caused by variety of pathogens that include bacteria, virus, protozoa and helminths. Among all these pathogens, parasites are the major cause of sub clinical cases which are not readily diagnosed in field conditions hence affecting production and economic status. These internal parasites cause prolonged and long term effects on animal health and wellness. A reduction in growth rate by 1/3rd is reported due to helminthic infestation in ruminants. Gastrointestinal nematodes that infect small ruminants mainly fall under Family Trichostrongylidae that consists of many pathogenic nematodes; most important among these is Haemonchus contortus. Pathogenesis of H. contortus is mainly correlated to its haematophagus nature leading to anaemia and high prolificacy causing rapid build-up of infection in the environment. Following review provides a general insight into gastrointestinal nematode parasitism and helps in better understanding of pathogenesis of haemonchosis. | Gastrointestinal nematodiasis with main emphasis on infection in small ruminants