The results are ready from a national centers for disease control (CDC) study of tick-borne diseases in the Island Wampanoag population, but the outbreak of swine flu may delay their release, the tribe’s environmental health coordinator Cynthia Robinson said this week.

The study is a key feature of a wide-ranging environmental health exposition this Saturday, put on by the Wampanoag Tribe of Gay Head (Aquinnah). The event runs from 9 a.m. to 4 p.m. at the Harbor View hotel in Edgartown.

The results will provide data on how Lyme disease and tularemia affect tribal populations and, as a comparatively extensive study, should also prove informative for Vineyard health care generally.

But due to the pressure of researching the current outbreak of swine flu, scheduled CDC speaker Alison Hickley may not be able to attend the event, Ms. Robinson said.

And she said results will not be released until they are formally presented to the tribal council.

More than 70 tribal members supplied blood samples for the study, which was carried out last fall. Lyme disease has reached epidemic levels on the Island and has prompted several ongoing studies, and an Island Lyme support and strategic response group, the Martha’s Vineyard Lyme Disease Association.

Admission is free at Saturday’s event, which will feature presentations from local figures in environmental health.

Among them, leaders of the Island Grown Initiative Ali Berlow and Noli Taylor will talk about eating locally grown foods.

Jeffrey May will make a presentation on household mold and moisture. Martha’s Vineyard Commission water resource planner Bill Wilcox will discuss the work of the Island Plan water resources group.

The exposition is part of a three-year tribe project funded in part by a CDC grant.

Ms. Robinson said the point of the exposition is to present the connection between environment and human health.