Abstract
Helicobacter pylori was isolated from marine zooplankton, and characterized by stan- dard microbiological tests, by PCR amplification of vacA and cagA gene fragments, and by compar- ative sequence analysis of the vacA PCR product. In a viable-but-non-culturable (VBNC) state, this isolate, as well as the reference strain H. pylori ATCC 43629, could be re-activated only when incu- bated in the presence of the marine copepod Tigriopus fulvus, and not in its absence. Isolate and type strain of H. pylori were found to be associated to the surface of T. fulvus, which supports speculations about a potential role of copepods in H. pylori survival and transmission.
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