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  • Title: Campylobacter spp. in New Zealand raw sheep liver and human campylobacteriosis cases.
    Author: Cornelius AJ, Nicol C, Hudson JA.
    Journal: Int J Food Microbiol; 2005 Mar 01; 99(1):99-105. PubMed ID: 15718033.
    Abstract:
    Sheep liver samples were tested for the presence and numbers of Campylobacter jejuni and C. coli during both spring and autumn. Over the same period, isolates were obtained from human clinical cases from the same geographical area as where the food samples were purchased. A subset of the C. jejuni isolates was typed by both Penner serotyping and pulsed field gel electrophoresis using the restriction enzyme SmaI, to estimate the proportion of liver isolate types that were also isolated from human cases of campylobacteriosis. Of the 272 liver samples tested, 180 (66.2%) contained Campylobacter. Most of the positive samples contained <3 MPN/g of the organism, and only 12 (6.7%) were contaminated at a level exceeding 100 MPN/g. A total of 180 C. jejuni isolates were obtained from sheep liver and another 200 from human faeces. Of these, 212 isolates were randomly selected for typing, half from raw liver and half from human faeces. More than half (61.1%) of the 106 C. jejuni isolates from liver were of subtypes that were also isolated from human cases. While the C. jejuni present in sheep liver were mostly of subtypes also isolated from human cases, the significance of this food as a vehicle of human campylobacteriosis needs to be examined further in respect to other factors such as dose-response information, consumption data, frequency of undercooking and cross contamination.
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