Журнал бактериологии и паразитологии

Абстрактный

Egg production by paramphistoma in dairy cattle

D. J. Liao, H. D. Wang, J. Q Ye, X. D. Jiang, W. Zeng, J. Zh. Lin, Y. Fu and Y. J. Wei

This paper reports the Paramphistomata egg production in dairy cattle. Six dairy cows, four Chinese Holstein cows and two Simmental cows aged 4.1, 6.4, 6.8, 7.3, 7.8, 9.1 years were examined. The total number of Paramphistomata eggs was calculated from the total feces of the cow per day. The results were 1.8×106, 4.1×106, 1.8×107, 9.0×106, 1.5×107 and 4.3×105 eggs. Dissection was used to collect paramphistomata samples from the rumen, omasum, rectum and cecum of the six dairy cows in their entirety. The results showed that the total number of worms was 1660, 1180, 5047, 3115, 4463 and 132, which showed that the egg production of Paramphistomata was 1084, 3458, 3524, 2907, 3360 and 3258 per worm per day respectively. The average egg production was 2932 eggs/worm/day. On the other hand, slide samples of 371 Paramphistomata worms from six necropsied cows were identified by species. The results of morphological analysis showed that ten species can be classified into four genera: Paramphistomum (P. cervi, P. gotoi and P. gracile), Calicophoron (C. skrjabini and C. calicophorum), Ceylonocotyle (C. longicoelium, C. streptocoelium, C. dicranocoelium and C. scoliocoelium) and Homalogaster (H. paloniae), as well as into two families: Paramphistomatidae and Gastrodiscidae.