ArticleJournal of clinical microbiology2004
Phenotypic and molecular characteristics of Streptococcus agalactiae isolates recovered from milk of dairy cows in Brazil.
Article in Journal of clinical microbiology, 2004. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 28 papers.
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Who cites it
28 citing papers in PubMed, 62 citations in OpenAlex.
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- Characterization of Virulence Factors and Antimicrobial Susceptibility ofAnimals : an open access journal from MDPI · 2024Article
- Genotypic and antimicrobial susceptibility ofFrontiers in veterinary science · 2023Article
- A Retrospective National Study on Colonization Rate and Antimicrobial Susceptibility ofYonsei medical journal · 2022Article
- Virulence Factor Genes and Cytotoxicity ofMicrobiology spectrum · 2022Article
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- Multidrug Resistance and Molecular Characterization ofFrontiers in cellular and infection microbiology · 2021Article
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- A Perspective on the Potential Zoonotic Role ofFrontiers in microbiology · 2018Article
- Inapparent Streptococcus agalactiae infection in adult/commercial tilapia.Scientific reports · 2016Article
- Detection and Enumeration of Streptococcus agalactiae from Bovine Milk Samples by Real-Time Polymerase Chain Reaction.Current microbiology · 2015Article
- Molecular and Phenotypic Characterization of Aerococcus viridans Associated with Subclinical Bovine Mastitis.PloS one · 2015Article
- Environmental dissemination of antibiotic resistance genes and correlation to anthropogenic contamination with antibiotics.Infection ecology & epidemiology · 2015Article
- Emerging trends in invasive and noninvasive isolates of Streptococcus agalactiae in a Latin American hospital: a 17-year study.BMC infectious diseases · 2014Article
- Conjugative transfer of resistance determinants among human and bovine Streptococcus agalactiae.Brazilian journal of microbiology : [publication of the Brazilian Society for Microbiology] · 2014Article
- Molecular characterization of Streptococcus agalactiae and Streptococcus uberis isolates from bovine milk.Tropical animal health and production · 2012Article
- Molecular epidemiology of mastitis pathogens of dairy cattle and comparative relevance to humans.Journal of mammary gland biology and neoplasia · 2011Review
- Phenotypic and genotypic characterization of group B streptococcal isolates in southern Brazil.Journal of clinical microbiology · 2010Article
- Association of Group B Streptococcus colonization and bovine exposure: a prospective cross-sectional cohort study.PloS one · 2010Article
- Invited review: The role of contagious disease in udder health.Journal of dairy science · 2009Review
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Authors and funding
5 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Information on the characteristics of Streptococcus agalactiae obtained from bovine sources in Brazil is still very limited. The aim of this study was to assess the phenotypic and genotypic diversity among S. agalactiae isolates from milk of dairy cows presenting clinical or subclinical mastitis in the southeast region of Brazil. Phenotypic characterization was based on physiological and serological tests. Antimicrobial susceptibility tests were carried out by the disk method. Genetic diversity was evaluated by using random amplified polymorphic DNA-PCR (RAPD-PCR) (by using the primer 1254) and pulsed-field gel electrophoresis (PFGE) (by using SmaI as the restriction enzyme) and by PCRs for detection of genes associated with resistance to erythromycin and tetracycline as well as PCRs for detection of genes coding for cell surface-associated proteins. According to the results of physiologic tests, 45 (52.9%) isolates showed beta-hemolysis and 44 (51.7%) were susceptible to bacitracin. Fourteen different biotypes were detected. The two most frequent biotypes comprised strains that were non-beta-hemolytic; fermented galactose, lactose, and salicin; produced protease; and were negative for DNase production. Serotype III was predominant (66 isolates [77.6%]), followed by serotypes II, Ia, Ib, and VI. Resistance to tetracycline and erythromycin was found in 38 (44.7%) and 9 (10.5%) isolates, respectively, with tet(O) (31.7%) and erm(B) (100%) being the most frequently occurring resistance genes. Three genes coding for surface proteins, bca, lmb, and scpB, were detected in 55 (64.7%), 7 (8.2%), and 43 (50.5%) isolates, respectively. In most cases, isolates from animals in the same herd presented closely related genetic profiles (determined by either RAPD-PCR or PFGE), which were distinct from those of isolates from different herds.
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