-Shift Detection of Dog-Derivedand.

Abstract

To develop a-shift method for detection of dog-derivedandthree sets of primers were designed based on three SNPs (ITS71, ITS197, and ITS296) of their internal transcribed spacer 1 (ITS1) sequences. The detection effect of the-shift was assessed through the stability, sensitivity, accuracy test, and clinical detection. The results showed that these three sets of primers could distinguish accurately betweenand. The coefficient of variation in theirvalues on the three SNPs was 0.09% and 0.15% (ITS71), 0.18% and 0.14% (ITS197), and 0.13% and 0.07% (ITS296), respectively. The lowest detectable concentration of standard plasmids forandwas 5.33 × 10 ng/L and 5.03 × 10 ng/L. The-shift results of ten DNA samples from the dog-derived hookworms were consistent with their known species. In the clinical detection of 50 fecal samples from stray dogs, the positive rate of hookworm detected by-shift (42%) was significantly higher than that by microscopic examination (34%), and the former can identify thespecies. It is concluded that the-shift method is rapid, specific, sensitive, and suitable for the clinical detection and zoonotic risk assessment of the dog-derived hookworm.