Natural parasitsm of buffalo cows in Botucatu, SP, Brazil: III. Dynamics of gastro-intestinal parasitism in cows and calves

Memórias do Instituto Oswaldo Cruz

Maria Aparecida Barbosa²  Antonio Carlos Blasi¹  Mauro Rodrigues Oliveira¹  Fernando M. A. Corrêa¹ 

[1],Universidade Estadual Paulista Instituto de Biociências Departamento de ParasitologiaBotucatu,Brasil

关键词: buffaloes;    natural parasitism Toxocara vitulorum;    Strongyloides;    Strongylids;    Coccidia;   

DOI  :  10.1590/S0074-02761992000500008

来源: SciELO

【 摘 要 】

Gastro-intestinal parasitism of 24 buffalo cows before parturition, and post-parturition, their infection and that of their respective calves during the following 30 weeks were studied. Willis, Hoffmann and whenever possible, the modified Gordon & Whitlock techniques were used for fecal examinations. Toxocara vitulorum eggs were the earliest forms encountered in calves feces, as follows: during the 1st week after birth, 58.33% of the calves were positive, and in the 4th week, 100% of these animals were positive. Eggs of Strongyloides sp were in the 1st week after birth in two of the calves and in the 5th week, all for them were positive. The next parasites to appear were the Coccidia of which oocysts were detected in the feces of two calves in the 2nd week after birth, and 58.33% of the calves were positive for these in the 3rd week, and in the 6th week, all calves shed oocysts in their feces. On the other hand, eggs of Strongylids were the last forms to appear in calves feces. However, despite their sporadic appearance in the feces, eggs of these parasites were observed continuously from the 11th week onwards, and at this point, the percentage of positive samples began to increase to reach its peak. Relatively to adult animals, eggs of T. vitulorum were observed in the feces of 11 cows, one or twice at most; eggs of Strongyloides sp were seen only once in the feces of four buffalo cows and eggs of Strongylids in 21 out of 24 cows. Oocysts of Coccidia were observed in 16 cows. Mechanisms of infestation of calves with these parasites are discussed.

【 授权许可】

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