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Multilocus genotyping of Giardia duodenalis in lambs from Spain reveals a high heterogeneity

Permanent URL:
http://handle.nal.usda.gov/10113/56591
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Abstract:
Fecal specimens from 120 lambs in Valencia (Spain) were analyzed for Giardia duodenalis by IFA and nested-PCR using the beta giardin (bg), glutamate dehydrogenase (gdh), triose phosphate isomerase (tpi) and small subunit ribosomal RNA (ssurRNA) genes. The highest prevalence was obtained using the ssurRNA gene (89.2%), whereas values from other techniques ranged from 64.1% to 69.2%. Sequences of the ssurRNA showed a high proportion of assemblage A or mixed assemblage A/E samples (55.1% and 25.2%, respectively). When the other 3 loci were analyzed, between 6.5% and 15.4% were found to be assemblage A or A/E, respectively. Nested PCR for the tpi gene was the most variable of the targets employed. Twelve new sequences of gdh and tpi for G. duodenalis from sheep were found. Multilocus genotyping resulted in 63 patterns from the 71 samples sequenced at the four loci. This high variability among isolates possibly reflects the high frequency of mixed infections.
Author(s):
María Teresa Gómez-Muñoz , Carmen Cámara-Badenes , María del Carmen Martínez-Herrero , María Auxiliadora Dea-Ayuela , María Teresa Pérez-Gracia , Salceda Fernández-Barredo , Mónica Santín , Ronald Fayer
Note:
USDA Scientist Submission
Source:
Research in veterinary science 2012 Oct. v.93 no.2
Language:
English
Publisher:
Harcourt
Year:
2012
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
Rights:
Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.