title: Management and nutritional factors associated with the detection of Salmonella sp. from cattle fecal specimens from feedlot operations in the United States.
abstract: In a convenience sample of 100 feedlot operations (included in the United States Department of Agriculture: Animal and Plant Health Inspection Service 1994 Cattle on Feed Evaluation), up to 25 cattle fecal samples were collected and tested for the presence of Salmonella from each of two pens (the pen which contained the most-recent arrivals, and the pen with cattle that had been on feed the longest). One or more Salmonella spp. were recovered from 38 (38.0%) of the 100 feedlots, 52 (26.0%) of the 200 pens and 273 (5.5%) of the 4977 fecal samples collected. Multivariable logistic regression indicated that feeding tallow and feeding whole cottonseed or cottonseed hulls within seven days prior to fecal sample collection was associated with an increased risk of finding Salmonella in a pen. Variables not found to be significantly associated with the detection of Salmonella in a pen included region, operation size, use of sprinklers, time on feed, type of cattle in the pen, number and concentration of cattle in a pen, feeding probiotics, and various other feeds.
authors.affiliation: United States Department of Agriculture, Animal and Plant Health Inspection Service, Fort Collins, CO 80521, USA.
authors.forename: W C
authors.initials: WC
authors.lastname: Losinger
authors.forename: L P
authors.initials: LP
authors.lastname: Garber
authors.forename: M A
authors.initials: MA
authors.lastname: Smith
authors.forename: H S
authors.initials: HS
authors.lastname: Hurd
authors.forename: L G
authors.initials: LG
authors.lastname: Biehl
authors.forename: P J
authors.initials: PJ
authors.lastname: Fedorka-Cray
authors.forename: L A
authors.initials: LA
authors.lastname: Thomas
authors.forename: K
authors.initials: K
authors.lastname: Ferris
mesh_terms: D000821:Animal Feed / Q000592:standards; D000822:Animal Husbandry; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000175:diagnosis* / Q000453:epidemiology; D003369:Cottonseed Oil / Q000592:standards; D019468:Disease Management; D005223:Fats / Q000592:standards; D005243:Feces / Q000382:microbiology*; D006799:Housing, Animal; D012044:Regression Analysis; D012307:Risk Factors; D012475:Salmonella / Q000302:isolation & purification*; D012481:Salmonella Infections, Animal / Q000175:diagnosis* / Q000453:epidemiology; D011795:Surveys and Questionnaires; D014481:United States / Q000453:epidemiology
chemical_list: D003369:Cottonseed Oil; D005223:Fats; C013698:tallow