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Provedor de dados:  BJM
País:  Brazil
Título:  Antibiotic resistance in lactic acid bacteria isolated from some pharmaceutical and dairy products
Autores:  Gad,Gamal Fadl M.
Abdel-Hamid,Ahmed M.
Farag,Zeinab Shawky H.
Data:  2014-01-01
Ano:  2014
Palavras-chave:  Lactic acid bacteria
Phenotypic and molecular identification
PCR assay
Antibiotic resistance genes
Resumo:  A total of 244 lactic acid bacteria (LAB) strains were isolated from 180 dairy and pharmaceutical products that were collected from different areas in Minia governorate, Egypt. LAB were identified phenotypically on basis of morphological, physiological and biochemical characteristics. Lactobacillus isolates were further confirmed using PCR-based assay. By combination of phenotypic with molecular identification Lactobacillus spp. were found to be the dominant genus (138, 76.7%) followed by Streptococcus spp. (65, 36.1%) and Lactococcus spp. (27, 15%). Some contaminant organisms such as (Staphylococcus spp., Escherichia coli, Salmonella spp., mould and yeast) were isolated from the collected dairy samples but pharmaceutical products were free of such contaminants. Susceptibility of LAB isolates to antibiotics representing all major classes was tested by agar dilution method. Generally, LAB were highly susceptible to Beta-lactams except penicillin. Lactobacilli were resistant to vancomycin, however lactococci and streptococci proved to be very susceptible. Most strains were susceptible to tetracycline and showed a wide range of streptomycin MICs. The MICs of erythromycin and clindamycin for most of the LAB were within the normal range of susceptibility. Sixteen Lactobacillus,8 Lactococcus and 8 Streptococcus isolates including all tetracycline and/or erythromycin resistant strains were tested for the presence of tetracycline and/or erythromycin resistant genes [tet(M) and/or erm(B)]. PCR assays shows that some resistant strains harbor tet(M) and/or erm(B) resistance genes.
Tipo:  Info:eu-repo/semantics/article
Idioma:  Inglês
Identificador:  http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000100005
Editor:  Sociedade Brasileira de Microbiologia
Relação:  10.1590/S1517-83822014000100005
Formato:  text/html
Fonte:  Brazilian Journal of Microbiology v.45 n.1 2014
Direitos:  info:eu-repo/semantics/openAccess
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