The prevalence of Cysticercus cellulosae larvae in pigs in Son La province

Abstract

Study on prevalence of Cysticercus cellulosae larvae in pigs was conducted in three districts of
Son La province. The studied results showed that the infection rate of pigs with Cysticercus cellulosae
larvae in Bac Yen, Muong La and Mai Son districts was 3.13%, 2.67% and 1.99%, respectively. The
average number of larvae in a pig was from 1 to 9 (in the muscle), from 1 to 7 (in the brain), from 1 to
4 (in the kidney), from 1 to 3 (in the heart). The infection rate of pig increased by age. The infection
rate of pig in the summer-autumn season was higher than in the winter-spring season. The infection
rate of the local pig breeds was higher than that of the hybrid pig breeds. The infection rate of the
free grazing pigs was 4.91%, of the half grazing pigs was 1.32% and of the completely confined
pigs was 0.65%. In high mountain area, the infection rate of pig was 3.89%, in the low hill area, the
infection rate of pig was 2.33%, and in plain areas, this rate was 0.94%. The free grazing and
semi-grazing pigs facing with the risk of Cysticercus cellulosae larvae infection was 2.04 - 7.58 times
higher compared to the captive breeding pigs.