CHARACTERISTICS OF A LINE OF EIMERIA NECATRIX AFTER 16 SUCCESSIVE PASSAGES OF OOCYSTS COLLECTED AFTER PEAK OOCYST PRODUCTION

Hui Dong; Xun Suo; Ming Wang; Kedao Teng

doi:10.1645/GE-861R.1

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Hui Dong,¹ Xun Suo,^1,*,** Ming Wang,^1,* Kedao Teng^1,*

¹Shanghai Institute of Domestic Animal Parasitology, CAAS; The Key Open Laboratory for Animal Parasit

^** Parasitology Laboratory, College of Veterinary Medicine, China Agricultural University, Beijing 100094, China
^**† To whom correspondence should be addressed

Abstract

A line of Eimeria necatrix was selected by repeated passages of oocysts that were collected after peak oocyst production from feces or cecal contents of previously infected chickens. When compared with the parent strain, the new line of E. necatrix after 16 successive passages had the following characteristics: (1) the peak of oocyst production was delayed by 2 days; (2) the sizes of 9 endogenous development stages became larger; and (3) the reproductive capacity and the immunogenicity were both enhanced. This new line of E. necatrix may be used for the development of new coccidiosis vaccines.

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Hui Dong, Xun Suo, Ming Wang, and Kedao Teng "CHARACTERISTICS OF A LINE OF EIMERIA NECATRIX AFTER 16 SUCCESSIVE PASSAGES OF OOCYSTS COLLECTED AFTER PEAK OOCYST PRODUCTION," Journal of Parasitology 92(6), 1229-1234, (1 December 2006). https://doi.org/10.1645/GE-861R.1

Received: 10 February 2006; Accepted: 1 May 2006; Published: 1 December 2006

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