Genetic diversity of Yersinia pestis in Brazil
| Autor: | Valdir de Queiroz Balbino, Alzira Maria Paiva de Almeida, Nilma Cintra Leal, Maria Paloma Silva de Barros, T.C. Leal-Balbino, M.R. Araújo-Nepomuceno, Vladimir da Mota Silveira-Filho, Maria Betânia Melo de Oliveira |
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| Rok vydání: | 2012 |
| Předmět: |
Yersinia pestis
Minisatellite Repeats Multiple Loci VNTR Analysis Polymerase Chain Reaction Genetics medicine Cluster Analysis Molecular Biology Alleles Phylogeny Epizootic Electrophoresis Agar Gel Plague Genetic diversity Polymorphism Genetic Geography biology Strain (biology) Genetic Variation Outbreak General Medicine biology.organism_classification medicine.disease Subtyping Variable number tandem repeat Genetic Loci Brazil Multilocus Sequence Typing |
| Zdroj: | Genetics and Molecular Research. 11:3414-3424 |
| ISSN: | 1676-5680 |
| Popis: | Plague outbreaks are occasionally reported in Brazil. Unfortunately, due to great genetic similarity, molecular subtyping of Yersinia pestis strains is difficult. Analysis of multiple-locus variable number of tandem repeats (VNTR), also known as MLVA, has been found to be a valuable tool to discriminate among strains. To check for genetic differences, strains obtained from two different ecological complexes in Brazil collected during two different epidemiological events, an epizootic in Sítio Alagoinha in 1967 and an outbreak in Planalto da Borborema in 1986, were subtyped through MLVA using 12 VNTR loci. Three clusters (A, B and C) were observed. Of the 20 strains from the epizootic, 18 fit into cluster A. Cluster A was divided into two subgroups: A(1) (15 strains) and A(2) (3 strains). Of the 17 strains from the outbreak, 15 fit into cluster B. Cluster B was divided into three subgroups: B(1) (4 strains), B(2) (4 strains) and B(3) (7 strains). Cluster C is a singleton with one epizootic strain. The external standards, Y. pestis CO92 and Y. pseudotuberculosis IP32953, formed two clusters of singletons. The stability of 12 VNTR loci of three unrelated cultures included in this study was assessed. The 12 VNTR loci were stable through multiple serial subcultures in the laboratory. MLVA revealed that Y. pestis populations in Brazil are not monomorphic, and that there is intraspecific genetic diversity among Brazilian plague strains. We conclude that there is some correlation among genetic groups of this species, related to the temporal and geographic origin of isolates. |
| Databáze: | OpenAIRE |
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