数字农科院2.0

Decrease of colonization in the chicks' cecum and internal organs of Salmonella enterica serovar Pullorum by deletion of cpdB by Red system

文献类型： 外文期刊

作者： Liu, Huifang;Chen, Liping;Wang, Xiumei;Si, Wei;Wang, Huanan;Wang, Chunlai;Liu, Siguo;Liu, Huifang;Liu, Huifang;Li, Guangxing

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关键词： Salmonella serovar Pullorum;cpdB gene;Deletion;Invasion;Colonization

期刊名称： MICROBIAL PATHOGENESIS

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收录情况： SCI

摘要： Salmonella enterica serovar Pullorum (S. Pullorum) is a worldwide poultry pathogen of considerable economic importance, particularly in those countries with a developing poultry industry. A variety of genes that affect S. Pullorum colonization in chickens had been identified. 2',3'-cyclic phosphodiesterase (cpdB) is the bifunctional enzyme which possess 2',3'-cyclic phosphodiesterase as well as 3'-nucleotidase activity. To assess the role of cpdB of S. Pullorum in colonization of cecum and internal organs in poultry, seven-day-old chicks were infected with 10(9) CFU/ml of a cpdB mutant and wild type strain. High number of cpdB mutant and wild type strain colonized the internal organs shortly after infection, but no colonization of cpdB mutant were observed from internal organs at day 10 post-infection, meanwhile, wild type bacteria in internal organs were observed at day 16 post-infection. Furthermore, the colonization of cpdB mutant in the cecum was seriously decreased from 6 days post-infection simultaneously wild type strain was increased and seriously decreased at day 8 post-infection. At day 12 post-infection, no cpdB mutant was observed from cecum, however high numbers of wild type strain were isolated at day 16 post-infection. It is concluded that cpdB is involved in long-term colonization of S. Pullorum in the chicks' cecum and internal organs. In addition, deletion of cpdB from S. Pullorum was not affect the morphology and growth of bacteria. (C) 2015 Elsevier Ltd. All rights reserved.

分类号： R3

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