Prevalence of gastrointestinal nematodes infection of cross-bred Sind cattle and efficacy of anthelmintics in Tra Vinh province
The study was conducted to determine the prevalence of gastrointestinal nematodes infection of cattle and efficacy of anthelmintics in different regions of Tra Vinh province including Cau Ngang, Chau Thanh, and Tra Cu districts from 01 April 2019 to 30 December 2019. A total of 450 fecal samples from cattle was examined for gastrointestinal nematodiasis. Overall, the prevalence of gastrointestinal nematodes infection of cattle was found to be 43.8% from fecal samples by using floatation technique. The results of classification and identification of these parasites by using classical parasitological techniques showed that almost cattle in those regions of this study were infected by Heamonchus contortus (28.4%), Trichocephalus ovis (20.4%), and Toxocara vitulorum (6.0%). In addition, by the necropsied method, the infection of these parasites in cattle was 55.6%. This infection rate was also parallel increase in the age of animals with 25.0% (under 1 year), 58.3% (1 to 2 years), and 83.3% (over 2 years). Moreover, H. contortus, T. ovis, and T.vitulorum were also found in this method. Albendazole and Fenbendazole were used as oral anthelmintic drugs to deworm these parasites. The results presented that all of drugs were safe and have no side effects to animals during treating. Notably, Albendazole (100 mg or 150 mg/12 kg body weight) and Fenbendazole (100 mg/13 kg or 20 kg body weight) were the most effective with 100% of deworming.
