Basic & Clinical Medicine ›› 2020, Vol. 40 ›› Issue (4): 523-527.

• Original Articles • Previous Articles     Next Articles

Comparison of liquid-phase chip and real-time fluorescent quantitative PCR for the detection of infectious diarrhoeal pathogens in children

HAN Cong-hui1, CAO Guang-jin2, ZHANG Fu-zhen1, HU Liang-shan3, CAO Dong-lin3*, LI Ling1*   

  1. 1. Biosafety Level 3 Laboratory, School of Public Health, Southern Medical University, Guangzhou 510515;
    2. Panyu District Center for Disease Control and Prevention, Guangzhou 511400;
    3. Department of Laboratory Medicine, Guangdong Second Provincial General Hospital, Guangzhou 510317, China
  • Received:2019-11-12 Revised:2020-01-15 Online:2020-04-05 Published:2020-04-06
  • Contact: *liling@smu.edu.cn; caodl@126.com

Abstract: Objective To investigate the efficiency of liquid-phase chip on the detection of infectious diarrhea pathogens in children, and provide reference for rapid clinical diagnosis of infectious diarrhea diseases. Methods Stool samples of 96 infants and children with diarrhea were collected and detected by xTAG®Gastrointestinal Pathogen Panel (GPP), and the results were compared with the real-time PCR method. Results Total of 7 pathogens were detected by liquid-phase chip technology, with a positive detection rate of 65.63%(63/96), and the Salmonella detection rate was highest as 50%(48/96). The positive rate of single pathogen infection was 39.58%(38/96), and the positive rate of mixed infection was 26.04%(25/96). Overall, compared with the results of real-time PCR, the sensitivity and specificity of the liquid-phase chip in the detection of diarrhea pathogens were 100% and 71.74%, respectively, and negative predictive value and positive predictive value were 100.00% and 79.37%, respectively(P<0.05). Conclusions Compared with real-time PCR, liquid-phase chip is a character-ized by high throughput, rapid and reliable so support laboratory diagnosis of contagious diarrhea

Key words: liquid-phase chip, real-time PCR, infectious diarrhea diseases, pathogen detection

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