434 CASES IN STATE IN '84
The number of confirmed cases of Lyme disease - a tick-borne infection that can cause recurring arthritis - set a record last year in New York State, according to health officials. Authorities said 434 cases have been confirmed by laboratory tests for 1984 in New York State, primarily in the New York City suburbs of Westchester and Putnam Counties and Long Island. In 1983, the state reported 168 cases. Dr. Jorge Benach, a scientist with the State Health Department and an assistant professor of pathology at the State University of New York at Stony Brook, called it ''a suburban disease'' and said Westchester had experienced ''an unprecedented explosion of cases'' in 1984.