Evaluation of three PCR assays for the identification of the sheep strain (Genotype 1) of Echinococcus granulosus in canid feces and parasite tissues

Belgees S. Boufana, Maiza Campos-Ponce, Ariel Naidich, Imad Buishi, Selma Lamar, Eberhard Zeyhle, David Jenkins, Benoit Combes, Hao Wen, Ning Xiao, Minoru Nakao, Akira Ito, Jiamin Qiu, Philip S. Craig

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)

Abstract

The performance of 3 PCR assays for the identification of the G1 sheep genotype of Echinococcus granulosus was evaluated using tissue and canid fecal samples. The "Dinkel" and "Stefanic" primers were the most sensitive in detecting E. granulosus DNA in feces of necropsied dogs (73.7% and 100%, respectively). The "Abbasi" primers detected 52.6% of E. granulosus infected dogs but were the most species-specific, cross-reacting only with Echinococcus shiquicus (tissue 90.9%; feces 75%). The Stefanic primers were the least specific (tissue, 27.3%; feces, 25%) for E. granulosus. The Dinkel primers also showed inter-species cross-reactivity (tissue, 63.6%; feces, 100%) but were found to be strain-specific for the E. granulosus G1 sheep genotype. Improvement of PCR tests for Echinococcus species and subspecific variants should rely on the use of less-conserved genes and development of protocols that improve the quality and quantity of DNA extracted from feces.
Original languageEnglish
Pages (from-to)777-783
Number of pages7
JournalAmerican Journal of Tropical Medicine and Hygiene
Volume78
Issue number5
Publication statusPublished - 2008

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