PRELIMINARY-STUDY OF NEMATODE INFECTIONS OF CATTLE IN THE 6 PROVINCESOF THAILAND IN THE DRY SEASON

Fecal nematode egg counts and serum pepsinogen concentrations of cattl e were determined in six Provinces of the northern (Chiangrai and Lamp ang), north-eastern (Khonkaen, Mahasarakham and Nakhonratchasima) and eastern (Chonburi) parts of Thailand in the dry season. Nematode eggs were detected in 82% of animals examined. Serum pepsinogen concentrati ons ranged from 78 to 2,951 (mean 934) mU tyrosine. Animals in Chonbur i Province had higher mean Values for both egg counts and serum pepsin ogen concentrations than animals in the other Provinces. Two calves in Khonkaen and Mahasarakham Provinces were found to be heavily infected with Strongyloides papillosus, with 10,840 and 9,593 eggs/g feces. Th e source and route of S. papillosus infections remained unknown.