<i>Campylobacter jejuni</i>in dairy cows and raw milk

Humphrey, Tom J.; Beckett, Peter G. S.

doi:10.1017/s0950268800062014

Cited by 76 publications

(66 citation statements)

References 20 publications

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“…Intestines of lambs at Fresh faeces of grazing sheep Species slaughter (n 1250) (n 252) ------------------------------------------------------------------------- --------------------------------------------------------------------------water the most likely source of infection (Humphrey and Beckett 1987). It has been shown locally that the numbers of campylobacters in water sources in lowland areas are greater than those in upland waters (Jones et al 1990c;Jones and Hobbs 1996).…”

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confidence: 99%

“…The striking difference between the data from visceral samples and data from fresh faeces strongly suggests that while most sheep carry a high number of thermophilic campylobacters, they do not always shed significant numbers in their faeces or they shed intermittently. These observations are difficult to explain although work in bovine hosts suggests that higher rates of isolation are found in intestinal samples than faecal or rectal samples (Humphrey and Beckett 1987). The high numbers of campylobacters in the intestine would also suggest that there is a high risk of carcass contamination at slaughter with Campylobacter species when gut contents are spilled during removal of the gut or hide.…”

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confidence: 99%

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Seasonal variation of thermophilic campylobacters in lambs at slaughter

et al. 1998

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ON ES . 1998. A survey of the isolation rate and population size of thermophilic campylobacters in lambs at slaughter was carried out to determine the seasonal variation of thermophilic campylobacters in ovine hosts. Isolation rates determined by enrichment methods were always higher than those using direct plating onto selective agar and showed that Campylobacter could be isolated from 91·7% (n 360) of samples from the small intestine of the lambs. Enumerations (MPN), done monthly over a 2-year period, averaged 4·00 log 10 (n 1080, S.D. 0·16) campylobacters g −1 fresh weight (fw) intestinal contents with some samples giving values higher than 7 log MPN gfw −1 . These results show that the prevalence of thermophilic campylobacters in sheep intended for slaughter is much higher than previously reported. Statistical analyses showed that there was a significant seasonal periodicity in the Campylobacter populations in the small intestines of lambs at slaughter (P 0·004) but that there was no statistical relationship with environmental parameters such as minimum and maximum temperature, rainfall or hours of sunshine. In an analysis along the length of the intestinal tract of lambs, campylobacters were isolated from 80% of small intestine and 30% of rumen samples, but not from the true stomach, large intestine or caecal samples. A survey of sheep grazing on salt marsh, fell (upland) and farm pasture showed that the isolation rate of thermophilic campylobacters in fresh faeces was substantially lower (29·3% (n 420)) than that from the small intestine of lambs at slaughter. No significant difference (×0·05) was found between the isolation rate of campylobacters from faeces sampled in late spring/early summer and autumn, nor between the different types of grazing.

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confidence: 99%

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confidence: 99%

Seasonal variation of thermophilic campylobacters in lambs at slaughter

et al. 1998

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“…The milk in two bottles where the tops had been pecked was examined for the presence and numbers of campylobacters using a most probable numbers (MPN) technique adapted from methods shown to maximize the detection of C. jejuni in naturally contaminated milk samples. [6,7].…”

Section: Examination Of Milk Samplesmentioning

confidence: 99%

“…One 250 ml sample, five 50 ml samples and five 5 ml samples of milk from each bottle were mixed with equal volumes of double strength 'Exeter' medium [12] and incubated and cultured as described previously [6,7,12]. Isolates were confirmed as C. jejuni using standard methods.…”

Section: Examination Of Milk Samplesmentioning

confidence: 99%

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A point source outbreak of campylobacter infection related to bird-pecked milk

1993

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SUMMARYA point source outbreak of Carnpylobacter jejuni affected 11 children in a day nursery. Milk consumed by the children was known to have been pecked by magpies on occasions. Illness was significantly associated with consumption of milk on a single morning. Examination of milk from a bottle pecked after the outbreak yielded campylobacters. The level of contamination was approximately six cells of C. jejuni per 500 ml of milk.

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Campylobacter Infection Associated With Raw Milk

Klein

Vergeront

Blaser³

et al. 1986

JAMA

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Raw milk is identified with increasing numbers of outbreaks of gastroenteritis and is an important vehicle for transmission of Campylobacter infection. Unlike Campylobacter jejuni, Campylobacter fetus subsp fetus has not been associated with common-source outbreaks of gastroenteritis. This report describes an outbreak of gastroenteritis involving C jejuni and a thermotolerant strain of C fetus subsp fetus associated with raw milk. Fifteen (39%) of 38 persons who attended a banquet in Wisconsin in June 1982 developed acute gastroenteritis. Stool specimens were obtained from nine ill guests; four yielded C jejuni and three yielded C fetus subsp fetus. The C fetus subsp fetus isolates were identified fortuitously, in part because of unusual thermotolerance (growth at 42 degrees C), permitting isolation at temperature appropriate for C jejuni. Survey results implicated raw milk as the source of the outbreak. Findings provide evidence of a potentially emergent milkborne pathogen contributing to the risk of raw milk consumption and suggest that current diagnostic laboratory techniques may fail to identify significant foodborne agents.

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Campylobacter jejuniin dairy cows and raw milk

Cited by 76 publications

References 20 publications

Seasonal variation of thermophilic campylobacters in lambs at slaughter

Seasonal variation of thermophilic campylobacters in lambs at slaughter

A point source outbreak of campylobacter infection related to bird-pecked milk

Campylobacter Infection Associated With Raw Milk

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