Document Detail

Giardia and Cryptosporidium infections in sheep and goats: a review of the potential for transmission to humans via environmental contamination.
MedLine Citation:
PMID:  19272199     Owner:  NLM     Status:  MEDLINE    
The public health significance of giardiasis and cryptosporidiosis in sheep is currently unclear. Some research suggests that they are probably not an important zoonotic reservoir, whilst other research indicates this potential exists, and some outbreaks have also been associated with infections in sheep. Actions to limit water supply contamination by sheep have sometimes been severe, occasionally creating problems between farming and public health communities. Here our knowledge on these parasites in both sheep and goats is reviewed; although direct evidence of transmission to humans via water supply contamination is limited, the data accrued indicate that this is a real possibility. As cryptosporidiosis in sheep is generally more prevalent than giardiasis, and species/genotypes of Cryptosporidium infections in sheep are likely to be infectious to humans, this parasite may be considered the greater threat. Nevertheless, geographical variation in prevalence and genotypic distribution is extensive and as measures to limit sheep grazing can have a highly negative impact, it is important that cases are judged individually. If water contamination from a particular population of sheep/goats is suspected, then suitable investigations should be instigated, investigating both prevalence and species/genotype, before precautionary measures are imposed.
L J Robertson
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Publication Detail:
Type:  Journal Article; Review     Date:  2009-03-10
Journal Detail:
Title:  Epidemiology and infection     Volume:  137     ISSN:  0950-2688     ISO Abbreviation:  Epidemiol. Infect.     Publication Date:  2009 Jul 
Date Detail:
Created Date:  2009-05-28     Completed Date:  2009-07-16     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8703737     Medline TA:  Epidemiol Infect     Country:  England    
Other Details:
Languages:  eng     Pagination:  913-21     Citation Subset:  IM    
Parasitology Laboratory, Department of Food Safety and Infection Biology, Norwegian School of Veterinary Science, Oslo, Norway.
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MeSH Terms
Cryptosporidiosis / transmission,  veterinary*
Giardiasis / transmission,  veterinary*
Goat Diseases / parasitology*,  transmission
Sheep Diseases / parasitology*,  transmission

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