title: Loop-Mediated Isothermal Amplification of the sefA Gene for Rapid Detection of Salmonella Enteritidis and Salmonella Gallinarum in Chickens.
abstract: Salmonella spp. pose a threat to both human and animal health, with more than 2600 serovars having been reported to date. Salmonella serovars are usually identified by slide agglutination tests, which are labor intensive and time consuming. In an attempt to develop a more rapid screening method for the major poultry Salmonella serovars, we developed a loop-mediated isothermal amplification (LAMP) assay, which directly detected the sefA gene, a fimbrial operon gene existing in several specific serovars of Salmonella enterica including the major poultry serovars, namely Salmonella enterica serovar Enteritidis (Salmonella Enteritidis) and Salmonella enterica serovar Gallinarum (Salmonella Gallinarum). With the 177 bacterial strains we tested, positive reactions were only observed with 85 strains of serovar Salmonella Enteritidis and Salmonella Gallinarum. The detection limit of the LAMP assay was 4 CFU/reaction with genomic DNAs of Salmonella Enteritidis (ATCC 13076) from pure culture and 400 CFU/ reaction with DNA extracted from spiked chicken feces. The LAMP assay was more sensitive than conventional culture, especially without enrichment, in detecting Salmonella Enteritidis (CMCC 50041) in the spiked fecal samples. The results show the sefA LAMP method is a rapid, sensitive, specific, and practical method for directly detection of Salmonella Enteritidis and Salmonella Gallinarum in chickens. The sefA LAMP assay can potentially serve as new on-site diagnostics in the poultry industry.
authors: 1 Poultry Institute , Chinese Academy of Agricultural Sciences, Yangzhou, Jiangsu, China .|2 Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses , Yangzhou, Jiangsu, China .
authors: Jiansen
authors: J
authors: Gong
authors: 3 Yangzhou University College of Veterinary Medicine , Yangzhou, Jiangsu, China .
authors: Linlin
authors: L
authors: Zhuang
authors: 1 Poultry Institute , Chinese Academy of Agricultural Sciences, Yangzhou, Jiangsu, China .
authors: Chunhong
authors: C
authors: Zhu
authors: 1 Poultry Institute , Chinese Academy of Agricultural Sciences, Yangzhou, Jiangsu, China .|2 Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses , Yangzhou, Jiangsu, China .
authors: Shourong
authors: S
authors: Shi
authors: 1 Poultry Institute , Chinese Academy of Agricultural Sciences, Yangzhou, Jiangsu, China .
authors: Di
authors: D
authors: Zhang
authors: 4 Xuzhou Vocational College of Bioengineering , Xuzhou, Jiangsu, China .
authors: Linji
authors: L
authors: Zhang
authors: 1 Poultry Institute , Chinese Academy of Agricultural Sciences, Yangzhou, Jiangsu, China .
authors: Yan
authors: Y
authors: Yu
authors: 1 Poultry Institute , Chinese Academy of Agricultural Sciences, Yangzhou, Jiangsu, China .|2 Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses , Yangzhou, Jiangsu, China .
authors: Xinhong
authors: X
authors: Dou
authors: 1 Poultry Institute , Chinese Academy of Agricultural Sciences, Yangzhou, Jiangsu, China .
authors: Bu
authors: B
authors: Xu
authors: 2 Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses , Yangzhou, Jiangsu, China .|3 Yangzhou University College of Veterinary Medicine , Yangzhou, Jiangsu, China .
authors: Chengming
authors: C
authors: Wang
mesh_terms: D000818:Animals; D002645:Chickens / Q000382:microbiology*; D002681:China; D015169:Colony Count, Microbial / Q000662:veterinary; D017931:DNA Primers / Q000737:chemistry / Q000378:metabolism; D004269:DNA, Bacterial / Q000302:isolation & purification / Q000378:metabolism; D004587:Electrophoresis, Agar Gel / Q000662:veterinary; D005243:Feces / Q000382:microbiology; D036781:Fimbriae Proteins / Q000235:genetics / Q000378:metabolism*; D006801:Humans; D057230:Limit of Detection; D058889:Molecular Typing / Q000662:veterinary; D021141:Nucleic Acid Amplification Techniques / Q000662:veterinary; D011201:Poultry Diseases / Q000175:diagnosis* / Q000382:microbiology; D012481:Salmonella Infections, Animal / Q000175:diagnosis* / Q000382:microbiology; D019779:Salmonella enterica / Q000145:classification / Q000254:growth & development / Q000302:isolation & purification* / Q000378:metabolism; D012477:Salmonella enteritidis / Q000145:classification / Q000254:growth & development / Q000302:isolation & purification* / Q000378:metabolism; D012680:Sensitivity and Specificity; D013997:Time Factors
chemical_list: D017931:DNA Primers; D004269:DNA, Bacterial; C080931:sefA protein, Salmonella enteritidis; D036781:Fimbriae Proteins