title: Development of a novel biochip for rapid multiplex detection of seven mastitis-causing pathogens in bovine milk samples.
abstract: To efficiently prevent and treat bovine mastitis and minimize its effect on the dairy industry, a sensitive, rapid, and specific test is required for identifying the mastitis-causing pathogens. In this study, a biochip capable of detecting 7 common species of mastitis-causing pathogens, including Corynebacterium bovis, Mycoplasma bovis, Staphylococcus aureus, and the Streptococcus spp. S. agalactiae, S. bovis, S. dysgalactiae, and S. uberis, within 6 hr was developed. The technique is based on DNA amplification of genes specific to the target pathogens and consists of 4 basic steps: DNA extraction of bacteria, polymerase chain reaction, DNA hybridization, and colorimetric reaction. To examine the accuracy and specificity of this biochip, a preliminary test with 82 random quarter milk samples were analyzed and compared with results from conventional microbiological methods conducted simultaneously. Results from all but 1 sample analyzed by the biochip were in agreement with those analyzed by bacteriology. The biochip could be a feasible tool for rapidly diagnosing mastitis-causing pathogens in milk and providing information for a more effective treatment to cure mastitis.
authors.affiliation: Hsinchu Branch Institute, Council of Agriculture, Taiwan Livestock Research Institute, Taiwan.
authors.forename: Kuo-Hua
authors.initials: KH
authors.lastname: Lee
authors.forename: Jai-Wei
authors.initials: JW
authors.lastname: Lee
authors.forename: Shih-Wen
authors.initials: SW
authors.lastname: Wang
authors.forename: Lu-Yuan
authors.initials: LY
authors.lastname: Liu
authors.forename: Mei-Fen
authors.initials: MF
authors.lastname: Lee
authors.forename: Shih-Te
authors.initials: ST
authors.lastname: Chuang
authors.forename: Yih-Min
authors.initials: YM
authors.lastname: Shy
authors.forename: Chu-Li
authors.initials: CL
authors.lastname: Chang
authors.forename: Ming-Che
authors.initials: MC
authors.lastname: Wu
authors.forename: Chau-Hwa
authors.initials: CH
authors.lastname: Chi
mesh_terms: D000818:Animals; D001419:Bacteria / Q000145:classification; D001431:Bacteriological Techniques; D002417:Cattle; D004269:DNA, Bacterial / Q000302:isolation & purification*; D008414:Mastitis, Bovine / Q000382:microbiology*; D046208:Microchip Analytical Procedures / Q000662:veterinary*; D008892:Milk / Q000382:microbiology*; D012680:Sensitivity and Specificity; D013045:Species Specificity
chemical_list: D004269:DNA, Bacterial