title: Specific discrimination of three pathogenic Salmonella enterica subsp. enterica serotypes by carB-based oligonucleotide microarray.
abstract: It is important to rapidly and selectively detect and analyze pathogenic Salmonella enterica subsp. enterica in contaminated food to reduce the morbidity and mortality of Salmonella infection and to guarantee food safety. In the present work, we developed an oligonucleotide microarray containing duplicate specific capture probes based on the carB gene, which encodes the carbamoyl phosphate synthetase large subunit, as a competent biomarker evaluated by genetic analysis to selectively and efficiently detect and discriminate three S. enterica subsp. enterica serotypes: Choleraesuis, Enteritidis, and Typhimurium. Using the developed microarray system, three serotype targets were successfully analyzed in a range as low as 1.6 to 3.1 nM and were specifically discriminated from each other without nonspecific signals. In addition, the constructed microarray did not have cross-reactivity with other common pathogenic bacteria and even enabled the clear discrimination of the target Salmonella serotype from a bacterial mixture. Therefore, these results demonstrated that our novel carB-based oligonucleotide microarray can be used as an effective and specific detection system for S. enterica subsp. enterica serotypes.
authors.affiliation: Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, South Korea.
authors.forename: Hwa Hui
authors.initials: HH
authors.lastname: Shin
authors.forename: Byeong Hee
authors.initials: BH
authors.lastname: Hwang
authors.forename: Jeong Hyun
authors.initials: JH
authors.lastname: Seo
authors.forename: Hyung Joon
authors.initials: HJ
authors.lastname: Cha
mesh_terms: D001431:Bacteriological Techniques / Q000379:methods*; D019731:Carbon-Nitrogen Ligases / Q000235:genetics*; D005516:Food Microbiology / Q000379:methods*; D020411:Oligonucleotide Array Sequence Analysis / Q000379:methods*; D019779:Salmonella enterica / Q000145:classification* / Q000235:genetics*; D012680:Sensitivity and Specificity
chemical_list: D019731:Carbon-Nitrogen Ligases