Journal article
Fecal Escherichia coli O157:H7 shedding patterns of orally inoculated calves
Veterinary microbiology, Vol.69(3), pp.199-205
1999
Handle:
https://hdl.handle.net/2376/104880
PMID: 10512044
Abstract
To assess the duration of fecal shedding upon initial infection, the duration of shedding after subsequent re-infection and the effects of dietary restriction and antibiotic treatment on shedding recrudescence, four, one-week-old calves were orally inoculated on three separate occasions with 5
×
10
8
cfu of
Escherichia coli O157:H7 strain 86-24 Nal-R. Fecal shedding was followed by serial culture three times weekly. Following the first inoculation, the calves shed
E. coli O157:H7 in their feces for a mean of 30 days, with a range of 20 to 43 days. Following the second and third inoculations, the calves shed
E. coli O157:H7 in their feces for 3–8 days. In each of the three inoculations, feed was withheld from the calves for 24
h after they had become fecal culture negative. Two calves resumed shedding, one for 1 day and the other for 4 days, after food was withheld after the third inoculation, but not in the first two inoculations. In the third inoculation, one calf resumed shedding for one day after treatment with oxytetracycline. No
E. coli O157:H7 strain 86-24 Nal-R was found in the calves at necropsy. These calves did not exhibit persistent low-level shedding, and did not appear to be persistently colonized with
E. coli O157:H7.
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Details
- Title
- Fecal Escherichia coli O157:H7 shedding patterns of orally inoculated calves
- Creators
- M.W Sanderson - Department of Veterinary Clinical Sciences, Washington State University, Pullman, WA 99164-6610, USAT.E Besser - Department of Microbiology and Pathology, Washington State University, Pullman, WA 99164-7040, USAJ.M Gay - Department of Veterinary Clinical Sciences, Washington State University, Pullman, WA 99164-6610, USAC.C Gay - Department of Veterinary Clinical Sciences, Washington State University, Pullman, WA 99164-6610, USAD.D Hancock - Department of Veterinary Clinical Sciences, Washington State University, Pullman, WA 99164-6610, USA
- Publication Details
- Veterinary microbiology, Vol.69(3), pp.199-205
- Academic Unit
- Veterinary Clinical Sciences, Department of; Veterinary Microbiology and Pathology, Department of
- Publisher
- Elsevier B.V
- Identifiers
- 99900547070701842
- Language
- English
- Resource Type
- Journal article