Journal article
Evaluation of day-old specific pathogen-free chicks as an experimental model for pathogenicity testing of intestinal spirochaete species
Journal of Comparative Pathology, Vol.118(4), pp.365-381
1998
Abstract
Specific pathogen-free chicks aged 1 day were challenged per os with strains of five different species of intestinal spirochaete originally isolated from pigs or human beings. A virulent strain of Serpulina hyodysenteriae (WA 15) colonized chicks, causing retarded growth rate and histological changes, including caecal atrophy, epithelial and goblet cell hyperplasia, and crypt elongation. A further strain of S. hyodysenteriae (SA3), which was apparently avirulent for pigs, and a strain of Serpulina intermedia (889) colonized fewer chicks, caused less severe lesions and did not significantly depress growth rate. Strains of Serpulina murdochii and Brachyspira aalborgi failed to colonize or cause histological changes. Four strains of Serpulina pilosicoli (Kar, Rosie-2299 and GAP 401, isolated from human beings, and 3295, isolated from a pig) colonized chicks, and large numbers showed polar attachment to the caecal epithelium; all strains, apart from Rosie-2299, caused watery diarrhoea and wet litter, but did not significantly retard growth. Variation both in the degree of spirochaetal attachment and the resulting development of lesions was observed between S. pilosicoli strains as well as between individual chicks infected with the same strain. The study indicated that chicks may be useful in studying the pathogenicity of strains of S. hypodysenteriae, S. intermedia and S. pilosicoli.
Details
- Title
- Evaluation of day-old specific pathogen-free chicks as an experimental model for pathogenicity testing of intestinal spirochaete species
- Authors/Creators
- D.J. Trott (Author/Creator)D.J. Hampson (Author/Creator)
- Publication Details
- Journal of Comparative Pathology, Vol.118(4), pp.365-381
- Publisher
- Elsevier BV
- Identifiers
- 991005541953307891
- Copyright
- © 1998 Published by Elsevier Ltd.
- Murdoch Affiliation
- School of Veterinary and Biomedical Sciences
- Language
- English
- Resource Type
- Journal article
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- 1 Clinical & Life Sciences
- 1.248 Sexually Transmitted Infections
- 1.248.2445 Lawsonia Intracellularis
- Web Of Science research areas
- Pathology
- Veterinary Sciences
- ESI research areas
- Plant & Animal Science