[Experimental infection of calves and sheep with bovine Giardia isolates].

Taminelli, V; Eckert, J; Sydler, T; Gottstein, Bruno; Corboz, L; Hofmann, M (1989). [Experimental infection of calves and sheep with bovine Giardia isolates]. Schweizer Archiv für Tierheilkunde, 131(9), pp. 551-564. Huber

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9 Giardia-free calves were artificially infected with 1.5-5.1 x 10(6) Giardia cysts originating from Swiss cattle ("bovine isolates"). In 4 of these animals the course of infection was examined. After prepatent periods of 7-8 days all calves excreted high numbers of Giardia cysts for 60-112 days. During patency on 44% of the examination days Giardia cysts and antigen could be detected simultaneously in faecal samples using the flotation method and a sandwich-ELISA, respectively. With the exception of light diarrhoea lasting only for some days at the beginning of patency no other symptoms occurred. Further 5 artificially infected calves were submitted to autopsy. Giardia trophozoites were detected in 4 calves in the jejunum and in 1 animal in the ileum (peroxidase-antiperoxidase method). All animals were simultaneously infected with Campylobacter spp. and/or Rota- and Corona-virus. Electronmicroscopically mucosal attachment sites of Giardia trophozoites had intact microvilli and enterocytes. In various parts of the intestine blunting and flattening of the villi and cellular infiltrations of the mucosa were present. These alterations in calves are generally associated with bacterial and/or viral infections of calves. A Swiss bovine Giardia cyst-isolate was transmitted to 4 Giardia-free conventionally maintained lambs which excreted Giardia cysts after prepatent periods of 10-21 days for 31-61 days.

Item Type:	Journal Article (Further Contribution)
Division/Institute:	05 Veterinary Medicine > Department of Infectious Diseases and Pathobiology (DIP) > Institute of Parasitology 05 Veterinary Medicine > Department of Infectious Diseases and Pathobiology (DIP)
UniBE Contributor:	Gottstein, Bruno
Subjects:	600 Technology > 630 Agriculture 600 Technology > 610 Medicine & health
ISSN:	0036-7281
Publisher:	Huber
Language:	German
Submitter:	Bruno Gottstein
Date Deposited:	18 Jul 2018 14:26
Last Modified:	05 Dec 2022 15:16
PubMed ID:	2587975
URI:	https://boris.unibe.ch/id/eprint/118635