Appl Environ Microbiol 1977 Oct 01;344:347-50. doi: 10.1128/aem.34.4.347-350.1977.

Bacterial flora of the sea urchin Echinus esculentus.

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A total of 85 isolates of mesophilic, aerobic, heterotrophic bacteria were isolated from the gut, peristomial membrane, and coelomic fluid from specimens of the sea urchin Echinus esculentus from the Clyde Sea area of Scotland. These isolates were compared with 26 isolates from sand and seawater in the same locality. Overall, strains of Pseudomonas and Vibrio predominated. Gut (with an average bacterial viable count of 2 X 10(7) per 3-cm section) and coelomic fluid (which was often sterile and rarely had more than 40 bacteria per ml) had similar distributions of genera, with Vibrio predominating and Pseudomonas and Aeromonas next in abundance. In contrast, the flora of the peristomial membrane (with an average count of detachable bacteria of 2.5 X 10(5) per membrane) resembled that of sand/seawater in having Pseudomonas predominating, gram-positive forms or Vibrio next in abundance, and smaller numbers of Aeromonas, Flavobacterium, Acinetobacter, and Moraxella.

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Genes referenced: LOC100887844

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