title: Development and evaluation of a loop-mediated isothermal amplification assay for the rapid detection of porcine cytomegalovirus under field conditions.
abstract: BACKGROUND
  Porcine cytomegalovirus (PCMV) induces silent infection in adult pigs but more frequently causes fatal, generalized infection in newborn piglets. This study aimed to develop a new loop-mediated isothermal amplification (LAMP) method for the sensitive, rapid, and inexpensive detection of PCMV under field conditions.
  
  
  METHODS
  Tissue obtained from nine-week-old PCMV-free Landrace pigs or pig samples from postmortem examinations were analyzed. The samples were found to have clinical signs and lesions consistent with inclusion body rhinitis. Six specific primers were designed by targeting the PCMV DNA polymerase (DPOL) DNA. The LAMP reaction was optimized in a water bath. The sensitivity and specificity of LAMP and polymerase chain reaction (PCR) were compared.
  
  
  RESULTS
  PCMV DNA was amplified at 65°C, and the result could be detected as early as 30 min into the reaction. Positive reactions could be visualized by the naked eye as a color change brought on by the addition of SYBR Green. The sensitivity and specificity of LAMP were found to be similar to those of the PCR.
  
  
  CONCLUSIONS
  LAMP is a high-throughput technique for the detection of PCMV and has a high specificity, sensitivity and simplicity; these factors make it suitable for detection of PCMV under field conditions.
authors.affiliation: Animal Science College of Guizhou University, Guiyang, Guizhou, China. a1921538734@qq.com
authors.forename: Jin-Long
authors.initials: JL
authors.lastname: Yang
authors.forename: Su-Hui
authors.initials: SH
authors.lastname: Zhang
authors.forename: Zuo-Hua
authors.initials: ZH
authors.lastname: Liu
authors.forename: Rui
authors.initials: R
authors.lastname: Yang
authors.forename: Yong
authors.initials: Y
authors.lastname: Huang
authors.forename: Ming
authors.initials: M
authors.lastname: Wen
mesh_terms: D000818:Animals; D003587:Cytomegalovirus / Q000235:genetics / Q000302:isolation & purification*; D003586:Cytomegalovirus Infections / Q000175:diagnosis / Q000662:veterinary* / Q000821:virology; D017931:DNA Primers / Q000235:genetics; D021141:Nucleic Acid Amplification Techniques / Q000379:methods*; D013552:Swine; D013553:Swine Diseases / Q000175:diagnosis / Q000821:virology*
chemical_list: D017931:DNA Primers