Retired Navy Capt. Leon P. Eisman, 63, a bacteriologist and health officer and combat veteran of three wars, died of cancer Saturday at Frederick Memorial Hospital.

His last assignment before retiring from active duty in 1973 was with the Marine Corps Barracks in Washington.

Born in Oklahoma City, Capt. Eisman was a graduate of Brown University and received a master's degree in public health from Massachusetts Institute of Technology.

An officer in the Navy Medical Service Corps, he saw duty in the Pacific in World War II, in Korea during the conflict there, and served with the 1st Marine Division in Vietnam.

His decorations for combat duty included the Bronze Star.

A registered microbiologist, Capt. Eisman had also been in charge of the Naval Epidemic Diseas Control Unit in Norfolk.

During 1962-66, he was commanding officer of the Navy Unit at Ft. Detrick, Md., and head of the enviromental health branch at the Navy Medical School in Bethesda in 1967-68.

In the early 1970s, Capt. Eisman served as deputy director of the Military BLood Program Agency of the Department of Defense.

He was a member of the American Society of Microbiology, the American Public Health Association and the Science Research Society of America.

He is sruvived by his wife, Lillian M., of the home in Frederick; a son, Air Force Capt. Leon P. Jr., of Bossier City, La.; a daughter, Jan Halderman, of Leesburg, Va., and two grandchildren.

The family suggests that expressions of sympathy may be in the form of contributions to the Frederick Cancer Society.