SITUATION OF INFECTION “gao” DISEASE ON SOME DISTRICTS OF DIEN BIEN PROVINCE

Abstract

Study on prevalence of Cysticercus cellulosae larvae in pigs was conducted in three districts of Dien Bien province. The studied results showed that the infection rate of pigs with Cysticercus cellulosae larvae in Nam Po, Tua Chua and Muong Ang districts was 3,79%, 3,48%, and 2,86%, respectively. The average number of larvae in a pig was from 1 to 10 (in the muscle), from 1 to 7 (in the brain), from 1 - 4 (in the kidney and in the heart). The infection rate of pig increased by age. The infection rate of pigs 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 5,84%, of the half grazing was 2,55% and of the completely confined pigs was 0,67%. In high mountain area, the infection rate of pig was 5,32%, in the low hill area the infection rate of pig was 2,84%, and in plain areas this rate was 1,30%. The free grazing and semi - grazing pigs facing with the risk of Cysticercus cellulosae larvae infection was 1,30 to 2,77% times higher compated to the captive bree.