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Titolo:
Pathogenicity of environmental origin salmonellas in specific pathogen-free chicks
Autore:
Dhillon, AS; Shivaprasad, HL; Roy, P; Alisantosa, B; Schaberg, D; Bandli, D; Johnson, S;
Indirizzi:
Washington State Univ, Coll Vet Med, Dept Pathol & Microbiol, Avian Hlth &Food Safety Lab, Puyallup, WA 98371 USA Washington State Univ Puyallup WA USA 98371 y Lab, Puyallup, WA 98371 USA Univ Calif Davis, Sch Vet Med, Fresno Branch, Calif Vet Diagnost Lab Syst,Fresno, CA 93725 USA Univ Calif Davis Fresno CA USA 93725 agnost Lab Syst,Fresno, CA 93725 USA
Titolo Testata:
POULTRY SCIENCE
fascicolo: 9, volume: 80, anno: 2001,
pagine: 1323 - 1328
SICI:
0032-5791(200109)80:9<1323:POEOSI>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
EXPERIMENTALLY INFECTED HENS; ENTERITIDIS PHAGE TYPE-4; UNITED-STATES; EPIDEMIOLOGY;
Keywords:
Salmonella enteritidis; infection; salmonella isolation; pathology; histopathology;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
27
Recensione:
Indirizzi per estratti:
Indirizzo: Dhillon, AS Washington State Univ, Coll Vet Med, Dept Pathol & Microbiol, Avian Hlth &Food Safety Lab, Puyallup, WA 98371 USA Washington State Univ Puyallup WA USA 98371 lup, WA 98371 USA
Citazione:
A.S. Dhillon et al., "Pathogenicity of environmental origin salmonellas in specific pathogen-free chicks", POULTRY SCI, 80(9), 2001, pp. 1323-1328

Abstract

Two hundred sixty 1-d-old specific pathogen-free (SPF), Single Comb White Leghorn chicks were used in this study to determine pathology caused by Salmonella enteritidis (SE) isolated from a poultry environment. The chicks were subdivided into 10 equal groups of 26 chicks each. Eight groups of chicks were inoculated individually with 0.5 mL of brain heart infusion broth culture containing 1 X 10(6) cfu of SE phage type (PT) -8 (1, 2, 3), SE PT5 A(1, 2), or SE PT4 (Ch-env-CA, chicken-CA, and human) by crop gavage. One group of 26 chicks were inoculated with 1 X 10(6) cfu of Salmonella pullorumper bird by crop gavage. Another group of 26 chicks were kept as an uninoculated control group. All the chicks were observed daily for clinical signsand mortality. Salmonella was reisolated from different organs at 7, 14, 21, and 28 postinoculation (DPI). All of the chicks were weighed individually at each interval. Two chicks at random from each group were euthanised and necropsied at each DPI for gross pathology. Selected tissues were examined for histopathological changes at 7 and 14 DPI. Dead chicks were examined for gross and histopathological lesions. Mortality rates were 30.7, 15.3, and 7.6% in the groups inoculated with S. pullorum, SE PT5A, and SE PT4 (chicken-CA), respectively. No mortality or clinical sign were observed in other treatment groups or in uninoculated control groups. Cecal pouches were found to be the ideal organ for reisolation of Salmlonella at acute or chronic infection compared with other organs. Mean body weights were reduced to 1.8 to 12.6% in inoculated groups compared with the uninoculated control group. The consistent gross and hispathological lesions were of peritonitis, perihepatitis, yolk sac infection, and enteritis. Subclinical Salmlonella infection identified in this study resulted in reduced body weights of inoculated birds compared with uninoculated controls.

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Documento generato il 30/11/20 alle ore 16:12:27