Some epidemiological characteristics of lungworm in local pigs in Dien Bien Dong and Muong Anh districts, Dien Bien province

Abstract

In order to determine some epidemiological characteristics of lungworm disease in the local pigs in Dien Bien Dong and Muong Ang districts of Dien Bien province, 424 local pigs were autopsied. The studied results showed that there were 78 local pigs infected with lungworm, accounted for 18.40%, the infection rate ranged from 14.16% to 23.23%; the average infection intensity was 31.53 ± 2.08 lungworms/pig, ranging from 6 to 83 lungworms/pig. At the same time, the fecal samples of 775 local pigs were tested and the result showed that there were 128 positive samples with lungworm, accounted for 16.52%, the infection rate ranged from 11.93% to 21.26%. The infection
intensity were mainly mild (60.16%) and on average (30.47%), the serious infection intensity was 9.37% only. The age of pigs, seasons, husbandry methods and terrain significantly affected to the prevalence and intensity of lungworm infection in the local pigs (P<0.05). The pigs were infected with
lungworms at all ages but the highest rate was at 3-6 months of age, then gradually reduced. The prevalence and intensity of lungworm in the indigenous pigs in the summer and autumn was higher than that in the spring and winter. The free-grazing pigs were infected with pulmonary worms with
the highest rate (23.20%) and the lowest infection rate of pigs that were raised in the indoor farms (4.35%). The infection rate with lungworm was increased gradually from the flat area (3.68%) to the semi-mountainous area (15.30%) and the highest rate was in the high mountains (23.55%).