More than a third of San Francisco doctors answering a recent survey said they are reluctant to treat AIDS patients, the San Francisco Medical Society reported. About 36% of the 335 physicians who answered the survey said they did not want to see any, or any additional, patients with the deadly acquired immune deficiency syndrome. One in six doctors surveyed said they did not want to treat patients with the disease. One in 12 said they did not want to treat AIDS patients because of the lack of effective treatment. Doctors in the survey represented all major medical specialties and all local hospitals. About 20% of the medical society's members responded.