Abstract
A screening study of in vitro antibacterial activity was conducted in marine bivalves with economical importance and widespread along the coast of Galicia (NW Spain). Hemocyte lysate supernatant (HLS) and plasma of Mytilus galloprovincialis, Ostrea edulis, Crassostrea gigas, Ruditapes decussatus, Ruditapes philippinarum, and Cerastoderma edule were incubated with Vibrio splendidus and Micrococcus sp. HLS and plasma for all the species demonstrated antibacterial activity, and C. edule had the highest activity per unit of protein in these hemolymph fractions. Significant differences were not found between HLS and plasma activities. Furthermore, antibacterial activity against Micrococcus sp. (Gram-positive) was stronger than against V. splendidus (Gram-negative).
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