Bovine salmonellosis

experimental production and characterization of the disease in calves, using oral challenge with Salmonella typhimurium.

Bradford Smith, F. Habasha, M. Reina-Guerra, A. J. Hardy

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

A highly virulent strain of Salmonella tyhimurium was given orally to produce disease experimentally in 21 normal colostrum-fed calves 3 to 9 weeks old. The challenge inoculum varied from 10(4) to 10(11) organisms. The disease was characterized by fever, depressed attitude, and decreased appetite. Many calves given larger challenge dose levels also had diarrheic feces containing mucus, fibrin, and blood. Fecal cultures were positive for salmonella. Septicemia occurred in some calves (9 of 15 calves cultured were positive). Eleven calves died and 10 calves survived challenge exposure. Survival was inversely related to the size of the challenge inoculum and directly related (although to a lesser degree) to age of the calf. White blood cell total and differential counts were variable. Both neutropenia and neutrophilia were observed. Plasma proteins decreased markedly in calves with diarrhea, probably indicating fecal protein loss. Fibrinogen increased during the acute stages of diarrhea.

Original languageEnglish (US)
Pages (from-to)1510-1513
Number of pages4
JournalAmerican Journal of Veterinary Research
Volume40
Issue number11
StatePublished - Nov 1 1979
Externally publishedYes

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Salmonella Infections
salmonellosis
Salmonella typhimurium
Salmonella Typhimurium
Salmonella
Diarrhea
mouth
calves
Colostrum
cattle
Appetite
Mucus
Neutropenia
Fibrin
Feces
Fibrinogen
Blood Proteins
Sepsis
Leukocytes
Fever

ASJC Scopus subject areas

  • veterinary(all)

Cite this

Bovine salmonellosis : experimental production and characterization of the disease in calves, using oral challenge with Salmonella typhimurium. / Smith, Bradford; Habasha, F.; Reina-Guerra, M.; Hardy, A. J.

In: American Journal of Veterinary Research, Vol. 40, No. 11, 01.11.1979, p. 1510-1513.

Research output: Contribution to journalArticle

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