Qin HP, Bi LH, Wei BL, Pan XY, Ye AL, Yi P. Development and clinical application of a nested-PCR assay for
Helicobacter hepaticus detection.
Shijie Huaren Xiaohua Zazhi 2015;
23:4507-4514. [DOI:
10.11569/wcjd.v23.i28.4507]
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Abstract
AIM: To develop a nested-PCR assay for the detection of Helicobacter hepaticus (H. hepaticus) with a high sensitivity and specificity and to analyze its clinical application.
METHODS: The nested primers were designed based on the sequences of 16S rRNA gene of nine subtypes of H. hepaticus. After optimizing reaction condition, the sensitivity and specificity of the assay were examined using simulated feces and bile samples, related bacteria, mouse infection model and clinical inpatients samples.
RESULTS: The detection limit for H. hepaticus strain in simulated feces and bile samples was 102 CFU/mL. No specific PCR product was detected with DNA from Helicobacter pylori, Helicobacter bilis, Campylobacter jejuni, Escherichia coli, Enterococcus faecalis, Pseudomonas aeruginosa and Staphylococcus aureus. H. hepaticus was successfully detected in the liver, caecum and feces of experimentally infected mice. Moreover, H. hepaticus was successfully detected in the gallbladder bile, gallbladder mucosa and fecal samples from two of ten patients with cholelithiasis. PCR methods, medical intervention, sample type and management may all influence the detection.
CONCLUSION: Due to the high sensitivity and specificity of the PCR assay, it may be used to detect H. hepaticus infection. H. hepaticus may be associated with the pathogenesis of human cholelithiasis. PCR methods, medical intervention, sample type and management may all influence the detection of clinical samples.
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