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Screening for antimicrobial activity among bacteria isolated from the Amazon Basin BJM
Motta,Amanda S.; Cladera-Olivera,Florencia; Brandelli,Adriano.
Bacteria producing antimicrobial activity were identified among 86 isolates from aquatic environments of Brazilian Amazon Basin. Antimicrobial activity against at least one indicator strain was detected for 59 isolates (68.6%). Inhibitory activity was mostly against Gram-positive bacteria, such as Listeria monocytogenes and Bacillus cereus. The antimicrobial substances produced by 19 strains that showed higher inhibitory activity were partially characterized. These antimicrobial substances showed thermal resistance for up to 100°C and partial resistance to proteolytic treatment. Some antimicrobials were partially resistant to pronase E at 2 mg ml-1 or to treatment with trichloroacetic acid. Detection of antimicrobial activity on polyacrylamide gels...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Antimicrobial activity; Listeria monocytogenes; Bacteriocins; Amazon Basin.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822004000300007
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Antibacterial activity of bacteriocin-like substance P34 on Listeria monocytogenes in chicken sausage BJM
Sant'Anna,Voltaire; Quadros,Deoni A.F.; Motta,Amanda S.; Brandelli,Adriano.
The antimicrobial activity of the bacteriocin-like substance (BLS) P34 against Listeria monocytogenes was investigated in chicken sausage. The BLS was applied to chicken sausages (256 AU g-1) previously inoculated with a suspension of 10² cfu g-1 of L. monocytogenes. BLS P34 inhibited the indicator microorganism in situ in all incubation times for up to 10 days at 5 °C. The effectiveness of BLS P34 was increased when it was added in combination with nisin. The bacteriocin was also tested in natural eatable natural bovine wrapping (salty semi-dried tripe) against the same indicator microorganism, also showing inhibitory capability in vitro. BLS P34 showed potential to control L. monocytogenes in refrigerated meat products.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bacteriocin; Chilled chicken sausage; Listeria monocytogenes; Biopreservation.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822013000400019
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