Protective effect of anticholinergic drugs and psyllium in a nosocomial outbreak of Norwalk gastroenteritis.
An outbreak of Norwalk agent gastroenteritis occurred in a chronic-care hospital in Tennessee in April 1981. Fifty-five per cent of the elderly psychiatric patients and 61 per cent of the nursing employees on one floor became ill. Infection was most likely to have spread from patient-to-patient by nursing employees. Certain chronic medications seemed to protect patients from symptomatic infection. Anticholinergic drugs appeared to mask the symptoms of this disease; psyllium ('Metamucil') may have prevented infection in some patients. We suggest that prospective studies be undertaken to confirm the possible value of psyllium in averting infection with Norwalk agent.