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  • Title: Prevalence of Cryptosporidium genotypes in pre and post-weaned pigs in Australia.
    Author: Johnson J, Buddle R, Reid S, Armson A, Ryan UM.
    Journal: Exp Parasitol; 2008 Jul; 119(3):418-21. PubMed ID: 18486131.
    Abstract:
    A total of 289 pig faecal samples were collected from pre-weaned and post-weaned piglets and sows from 1 indoor and 3 outdoor piggeries located in the south-west region of Western Australia and screened at the 18S rRNA locus for the presence of Cryptosporidium. An overall prevalence of 22.1% (64/289) was identified. Cryptosporidium was more prevalent in post-weaned animals (p<0.05); 32.7% (51/156) versus 10.6% (13/123) for pre-weaned animals. Sequence analysis identified Cryptosporidium suis in all pre-weaned isolates genotyped (7/13). In post-weaned pigs that were genotyped (n=38), the non-zoonotic Cryptosporidium species, pig genotype II was identified in 32 samples and C. suis in 6 samples. The zoonotic species Cryptosporidium parvum was not detected, suggesting that domestic pigs do not pose a significant public health risk. Pig genotype II was significantly (p<0.05) associated with 'normal' stools, indicating an asymptomatic nature in the porcine host.
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