During the acute stages of the disease food in a concentrated fluid form such as strong soups, broths, and milk should be given. As cardiac failure may occur during convalescence, stimulants must be administered early, and increased when cardiac failure appears imminent. The patient requires good nourishing food during convalescence, but it must be given in small quantities so as to avoid any over-distension of the stomach.

During an epidemic all articles of food must be carefully preserved from contamination by rats, as the plague bacillus may be introduced by the mouth and infection may take place through trivial lesions in the buccal or intestinal mucosa. Such contamination is prevented by keeping the food in a rat-proof store. During an epidemic, also, all the food should be thoroughly well cooked so as to destroy any plague bacilli which may have found access to it.