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Published in J Environ Qual 8:480-481 (1979)
© 1979 American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Incidence of Salmonellae in Feedlot Manure1

N. A. Clinton, R. W. Weaver, L. M. Zibilske and R. J. Hidalgo2

ABSTRACT

Manure from cattle in 11 major feefllots in Texas was sampled during summer and winter months to determine the presence of salmonellae. Both moist and dry samples of manure were collected. Of the 505 pens from which manure was sampled, 49 were positive for salmonellae. Only 2 of the 49 isolations were made from dry manure samples. One feedlot contained salmonellae in 44% of its pens. But no salmonellae were isolated from the manure in two of the feedlots. The frequency of isolating salmonellae from different feedlots varied with the season of the year but the overall frequency was similar for both seasons. Ten salmonella serotypes were isolated with the two most common being Salmonella typhimurium and Salmonella anatum. These results indicate that manure in feedlots may have an important role in the epidemiology of salmonellae.

Key Words: waste disposal • public health • epidemiology • animal health • pathogens • salmonellosis

NOTES

1 Contribution of Soil and Crop Sciences and Veterinary Microbiology and Parasitology Dep., Texas A&M Univ., College Station, TX 77843. Research supported in part by EPA Project R80334401. This paper is part of a Master of Science Thesis by the senior author in the Veterinary Microbiology and Parasitology Dep.

2 Research Associate, Associate Professor, and Postdoctoral, respectively, in the Soil & Crop Sci. Dep., Texas A&M Univ. Now director of Research, College Vet. Med., Mississippi State Univ., State College, Miss.

Received for publication November 24, 1978.




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