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Original Article

Responses of thymectomized and/or bursectomized chickens to sensitization with Candida albicans

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Pages 9-17 | Published online: 09 Jul 2009
 

Abstract

White Leghorn chickens, subjected to bursectomy, thymectomy, or both procedures within 48 hr. of hatching, were sensitized to Candida albicans beginning at 6 weeks and 14 weeks later. Bursectomy depressed the development of Candida agglutinins and precipitins; thymectomy depressed the development of delayed hypersensitivity as measured by the wattle test. These findings were most evident in chickens sensitized at 6 weeks but the same trend was present in those sensitized at 14 weeks. Total complement level was not influenced by bursectomy, thymectomy or sensitization. The surgically-modified chicken may provide a useful experimental model for further studies of candidiasis and related immunologic defense mechanisms.

Résumé

Des poulets blancs Leghorn ayant subi, 48 heures apr ès l'éclosion, une bursectomie une thymectomie ou la double opération, sont sensibilisés å Candida albicans 6 à 14 semaines plus tard.

La bursectomie provoque la diminution des agglutinines et des précipitines anti-Candida, et la thymectomie celle de l'immunité retardée, mesurée par test “wattle”. Ces faits sont plus évidents chez les poulets sensibilisés à 6 semaines mais on constate la même tendance chez ceux sensibilitisés à 14 semaines. Le niveau du complément total n'est pas influencé par la bursectomie, la thymectomie ou la sensibilisation. Les poulets modifiés chirurgicalement peuvent fournir un modèle experimental utilisable pour l'étude ultérieure des candidoses et des mécanismes de défense immunologique en rapport avec cette maladie.

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