Persistence of Salmonella enteritidis from one day of age until maturity in experimentally infected layer chickens
نویسندگان
چکیده
منابع مشابه
Virulence Determination of Three Iranian Isolates of Salmonella Enteritidis in Day-Old Layer Chicks
BACKGROUND: Salmonella Enteritidis (SE) infection in poultry is one of the most important concerns in poultry. Virulence and pathogenicity of the SE isolates from Iran have not been well studied so far. OBJECTIVES: In the present study, three Salmonella Enteritidis (SE) isolates were compared with a standard SE strain (PT21) for virulenc...
متن کاملHyporesponsiveness of the systemic and mucosal humoral immune systems in chickens infected with Salmonella enterica serovar enteritidis at one day of age.
Newly hatched chicks lack immunological maturity, which could compromise their ability to respond to infection by pathogens such as Salmonella enterica serovar enteritidis (S. enteritidis; SE). A study was conducted in which chicks were infected with a sublethal dose of SE at 1 d posthatch, and the systemic and intestinal immune responses to the challenge were followed over time. Birds infected...
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Medium-chain fatty acids are efficient antimicrobial agents. In our in vitro experiments, caprylic acid (C 8:0) was found the most effective fatty acid against salmonellas. The aim of this study was to evaluate the effect of caprylic acid on counts of salmonellas and coliforms in chickens experimentally infected with Salmonella enteritidis. Fourteen days old chickens were fed a commercially ava...
متن کاملInvasiveness and persistence of Salmonella enteritidis, Salmonella typhimurium, and a genetically defined S. enteritidis aroA strain in young chickens.
Newly hatched chicks were dosed orally with a Salmonella typhimurium wild-type strain, an S. enteritidis wild-type strain, and a genetically defined S. enteritidis aroA vaccine candidate, strain CVL30. The S. typhimurium strain, 2391 Nalr, was virulent in newly hatched chicks and caused deaths in 7 of 20 chicks after an oral dose of 10(5) organisms. The S. enteritidis wild-type strain, LA5, cau...
متن کاملIdentification of Salmonella enteritidis from experimentally infected hens using a colorimetric DNA hybridization method.
Identification of Salmonella enteritidis from cloacally challenged commercial laying hens was studied by comparing bacterial isolations using conventional methods with detection by the use of the GENE-TRAK colorimetric DNA probe assay. More positive test results were obtained using the latter on days 14, 28, and 42 postchallenge, but the difference between the two methods was not statistically ...
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ژورنال
عنوان ژورنال: Poultry Science
سال: 1998
ISSN: 0032-5791
DOI: 10.1093/ps/77.12.1759