›› 2019, Vol. 46 ›› Issue (2): 565-572.doi: 10.16431/j.cnki.1671-7236.2019.02.028

• Preventive Veterinary Medicine • Previous Articles     Next Articles

Establishment and Application of Visual LAMP Detection Method for Infectious Laryngotracheitis Virus

XIE Jing, YU Jifeng, ZHOU Long, CAO Ye, LIN Yi, LI Xingyu, XIAO Lu, YE Yonggang, PAN Meng, KANG Runmin   

  1. Animal Breeding and Genetics Key Laboratory of Sichuan Province, Sichuan Animal Science Academy, Chengdu 610066, China
  • Revised:2018-10-17 Online:2019-02-20 Published:2019-02-20

Abstract:

This study was aimed to establish a simple,rapid and efficient method for detection and diagnosis of infectious laryngotracheitis virus (ILTV).The specific perimers were designed for the loop mediated isothermal amplification (LAMP) reaction based on the conservative region of ILTV TK gene in GenBank.The LAMP detection method for ILTV was established through the optimization of the LAMP reaction system and reaction conditions,as well as the specificity,sensitivity and detection of clinical samples.The results showed that the established LAMP reaction exhibited the highest amplification efficiency under the parameters of internal primers (ILT9 FIP and ILT9 BIP),outer primers (ILT9-F3 and ILT9-B3),ring primers (ILT9-LB and ILT9-LF) and reaction temperature (66℃).The established LAMP detection method could specifically detect ILTV (Hungarian and Wanggang strains),there was no cross-react with Newcastle disease virus (NDV,B strain),avian infectious bronchitis virus (IBV,H52 and H120 strains),Escherichia coli,Haemophilus parasuis, Pasteurella,etc.Meanwhile,the sensitivity of the established LAMP detection method was 0.06 pg/L,and its sensitivity was 100 times of the conventional PCR method.50 clinical samples were tested by establishing LAMP method,the positive rate was 14%,and the coincidence rate was 96% with PCR method.This study established a LAMP detection method with high specificity,high sensitivity and simple operation,which was suitable for rapid detection and diagnosis of ILTV in clinical application.

Key words: ILTV; LAMP; TK gene

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