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Cadernos de Saúde Pública

Print version ISSN 0102-311XOn-line version ISSN 1678-4464


NASCIMENTO, Maria da Graça F.; CULLOR, James S.  and  SELSTED, Michael E.. In vitro activity of naturally occurring peptides (defensins) against Listeria monocytogenes. Cad. Saúde Pública [online]. 1994, vol.10, n.4, pp.440-445. ISSN 0102-311X.

Autoclaved distilled water samples were inoculated with L. monocytogenes strain V7 and strain VPH-1, and incubated aerobically, at 30 C for 48 hours. Each strain was tested individually, and growth curves were determined at 1, 2, 3, 4, 5, 21, 24, and 48 hours. The growth or survival of L. monocytogenes was similar for both strains, with survivors at 24 hour-incubation. The microbicidal activity of one synthetic cationic peptide (NP-2) was examined against L. monocytogenes strain V7, in a water system. Antibacterial activity of NP-2 (1, 5, and 10 g/ml) was best expressed at 60 minute-incubation, with 10 g/ml of peptide, at 30 C.

Keywords : Listeria monocytogenes; Defensins; Control; Lytic Peptide.

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