Occurrence and diversity of Giardia duodenalis assemblages in livestock in the UK.
Bottom Line: G. duodenalis assemblage E was found to be predominant in cattle and sheep, followed by assemblage A.Interestingly, some cattle, sheep and pigs were found to be infected with more unexpected assemblages (C, D, F).These data also suggest that there is a need to re-evaluate the clinical significance of G. duodenalis infection in livestock.
Affiliation: Department of Infection Biology, Institute of Infection and Global Health, Faculty of Health and Life Sciences, University of Liverpool, Liverpool, UK.Show MeSH
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Mentions: Of the 370 samples tested by PCR, 127 (34.3%) gave a positive result for Giardia spp. Of the 127 PCR-positive samples, 91 (71.6%) were successfully sequenced, confirming infection with G. duodenalis assemblages. No other species of Giardia were identified. The prevalence of Giardia infection in the six species surveyed and the distribution of the assemblages in the whole sample are reported in Table 1 and Fig. 1, respectively. Figure2 shows the occurrence of the assemblages in the two most represented species in our sample. In general, G. duodenalis assemblage E was the most common type found (57.1% of the samples), followed by assemblage A (22%) and mixed infections with both assemblages A and E (7.7%). The predominance of the assemblages A and E was observed in both cattle and sheep. Unexpectedly, the canine-specific assemblage C was found in a pig and two cattle and also mixed with assemblage A in the latter. Furthermore, assemblage D (alone or mixed with A) was detected in a few cattle and a ewe. Interestingly, two pigs were found harbouring the feline-specific assemblage F.
Affiliation: Department of Infection Biology, Institute of Infection and Global Health, Faculty of Health and Life Sciences, University of Liverpool, Liverpool, UK.