Hawaiʻi health officials are looking into whether a stomach parasite was picked up on Oʻahu itself, which would be a worrying first for local food safety.

• An Oʻahu resident came down with cyclosporiasis, a severe intestinal illness, without leaving the state.
• It is Hawaiʻi's sixth case, but the first five all involved people infected while traveling elsewhere.
• Because there was no travel, officials suspect the infection may have started locally.
• No contaminated food source has been identified so far.

Outlook: The health department's investigation will focus on tracking down a local food source, and more cases could surface if one is found.