title: Molecular characterization of Corynebacterium pseudotuberculosis isolates using ERIC-PCR.
abstract: Caseous lymphadenitis is an infectious sheep and goats disease caused by Corynebacterium pseudotuberculosis and characterized by abscesses in superficial and visceral lymph nodes. C. pseudotuberculosis strains isolated from these hosts have been shown to be very difficult to type by the existing methods. The aim of this study is evaluating the potential of the Enterobacterial Repetitive Intergenic Consensus (ERIC-PCR) as a tool for molecular typing of C. pseudotuberculosis strains isolated in sheep. One hundred and twenty seven isolates of C. pseudotuberculosis were isolated from lesions suspected to have had caseous lymphadenitis collected from sheep at the slaughterhouse. Animals were from 24 flocks in 13 municipalities of the Minas Gerais State, Brazil. Species identification of the isolates was performed by routine biochemical tests and mPCR. Fingerprint was performed by RAPD using ERIC-1R, ERIC-2 and ERIC-1R+ERIC-2 primers. Seventeen different genotypes were generated by ERIC 1-PCR, 21 genotypes by ERIC 2-PCR and 21 genotypes by ERIC 1+2-PCR. Hunter-Gaston Discrimination Index (HGDI) found for ERIC 1, ERIC 2, ERIC 1+2 PCR were 0.69, 0.87, and 0.84, respectively. For most herds evaluated observed at most three different genotypes among isolates from animals of these property, in all ERIC-PCR assays. However a few flocks observed between four and nine genotypes per flock. The W Kendall value found for correlation among the three techniques of ERIC-PCR was 0.91 (P<5.0 x 10(-6)). The results show that ERIC-PCR has good discriminatory power and advantages over other DNA-based typing methods, making it a useful tool to discriminate C. pseudotuberculosis isolates.
authors: Universidade Federal de Minas Gerais, UFMG, Escola de Veterinária, Departamento de Medicina Veterinária Preventiva, Laboratório de Sanidade de Ovinos e Caprinos, Av. Antônio Carlos 6627, Belo Horizonte, Minas Gerais, Brazil. alessandrodesa@uol.com.br
authors: Alessandro de Sá
authors: Ade S
authors: Guimarães
authors: Elaine Maria Seles
authors: EM
authors: Dorneles
authors: Giovanna Ivo
authors: GI
authors: Andrade
authors: Andrey Pereira
authors: AP
authors: Lage
authors: Anderson
authors: A
authors: Miyoshi
authors: Vasco
authors: V
authors: Azevedo
authors: Aurora Maria Guimarães
authors: AM
authors: Gouveia
authors: Marcos Bryan
authors: MB
authors: Heinemann
mesh_terms: D000818:Animals; D001938:Brazil; D016000:Cluster Analysis; D003354:Corynebacterium Infections / Q000175:diagnosis / Q000662:veterinary*; D016925:Corynebacterium pseudotuberculosis / Q000235:genetics* / Q000302:isolation & purification*; D016172:DNA Fingerprinting / Q000379:methods*; D005838:Genotype; D016133:Polymerase Chain Reaction / Q000662:veterinary*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012756:Sheep; D012757:Sheep Diseases / Q000382:microbiology*