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Asimismo, de 11 cepas bacterianas probadas solamente las cepas clínicas Staphylococcus aureus ATCC 25923 y Enterococcus faecalis ATCC 29212 y la cepa no clínica Staphylococcus aureus ATCC 6633 fueron sensibles a los extractos
algales. El extracto etanólico de B. plumosa presentó el mayor efecto antibacteriano contra las dos cepas de S.
aureus, manifestándose en el mayor tamaño de sus halos de inhibición, mientras que el extracto de P. fascia mostró mayor espectro antibacteriano, inhibiendo a las 3 cepas mencionadas.
Palabras clave: macroalga, antibiosis, metabolito, actividad antibacteriana,
bioactividad.
ABSTRACT
Antibacterial activity of ethanolic extracts from 12 macroalgae were
evaluated. Extracts were obtained according to the protocol of Vlachos et al. (1996).
Extracts were tested against with 5 clinic strains and 6 no clinic strains of the genus
Staphylococcus, Enterococcus, Pseudomonas, Escherichia, Salmonella, Aeromonas y
Vibrio. Only Grateloupia doryphora, Ahnfeltiopsis durvillaei, Prionitis decipiens
(Rhodophyta), Petalonia fascia (Phaeophyta) and Bryopsis plumosa (Chlorophyta) showed some antibacterial activity against the clinic strains Staphylococcus aureus ATCC 25923 and Enterococcus faecalis ATCC 29212 and the no clinic strain Staphylococcus aureus ATCC 6633. Ethanolic extract of B. plumosa presented the highest antibacterial activity against S. aureus
strains.
The extract of P. fascia showed the highest antibacterial activity against the three sensible
strains.
Keyword: macroalgae, antibiosis, metabolite, antibacterial activity,
bioactivity.
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