Situation of Macracanthorhynchus hirudinaceus worm infection in pigs in Bac Kan province

Abstract

The result of testing 966 pig fecal samples in 3 districts of Bac Kan province showed that the infection rate of pig with dendritic nematodes (Macracanthorhynchus hirudinaceus) was 25.78%, ranging from 23.91% - 27.64%. Of which, the infection rate of pig with heavy and very heavy
intensity was 8.84% and 2.81%. The pigs at age group from 0 to 3 months old were not infected with dendritic worm. The prevalence and infection intensity of dendritic worm in pigs gradually increased by the pig age groups, the highest infection rate was in the pig group at > 6 months
old (44.72%), with heavy and very heavy intensity was 11.81% and 3.47%. The infection rate of pig was highest in summer (36.36%), followed by autumn (29.46%), spring (25.62%) and lowest in winter (11.62%). The pigs in free grazing faced with the highest infection rate (47.20%), followed by semi-grazing (20.50%) and the lowest infection rate of pigs was in captive raising (9.63%). The infection rate of local black pigs was highest (37.27%), followed by Mong Cai pigs (28.88%) and the lowest infection rate was in F1 hybrid pigs (11.18%).