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Updated: Aug 14, 2026

Catheterization of Intestinal Loops in Ruminants
Published on: June 11, 2009
[Protozoan infection causes diarrhea in calves]
T Geurden1, E Claerebout, J Vercruysse
1Laboratorium voor Parasitologie, Faculteit Diergeneeskunde, Universiteit Gent, Salisburylaan 133, B-9820 Merelbeke, België. thomas.geurden@UGent.be
Abstract:
The role of protozoan parasites in the etiology of diarrhea in calves is highlighted with emphasis on correct diagnosis. In neonatal calves, Cryptosporidium parvum is isolated in more than 44% of the faeces of diarrhetic calves. In calves older than one month, both Eimeria bovis and E. zuernii, and Giardia duodenalis are associated with diarrhea and poor growth. Clinical diagnosis has to be confirmed by examination of host faecal material. Both for C. parvum and G. duodenalis immunological assays are available. Control measures must aim to reduce or prevent oocyst or cyst transmission, by combining management measures, desinfection and chemotherapeutic treatment.
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