covering in the interior is inflamed and ulcerated, and there is always some danger of the ulceration eating through the coating into the blood vessels, causing more or less bleeding and even eating the bowel enough to cause an opening (perforation) and the escape of the bowel contents into the abdominal cavity causing inflammation of the peritoneum (peritonitis) and almost certain death. Walking typhoid is dangerous for that reason. The food must be of such nature that it is all digested. It must not leave lumps to press upon the sore places in the bowels causing more trouble there and more diarrhea. [200 MOTHERS' REMEDIES] TYPHUS FEVER, (Filth Disease).--Typhus fever is an acute, infectious disease, characterized by a sudden onset, marked nervous symptoms, and spotted rash and fever ending quickly after two weeks. Also called jail, camp, hospital, or ship fever. Filth has a great deal to do with its production. There is no real characteristic symptom except the eruption. Symptoms.--It generally lasts two weeks. Incubation period of twelve days or less, marked at times by slight weary feeling. The onset is usually sudden, by one chill or several, with high fever, headache, pain in back and legs, prostration, vomiting, and mild and active delirium. Pulse does not have the double beat, often there is bronchitis. Eruption.--"This appears on the third to fifth day; the fever remaining high. During the second week all the symptoms increase and are weakening with marked delirium and coma vigil" (unconscious, delirious, but with the eyes open). When death occurs it usually comes at the end of the second week from exhaustion. Favorable cases terminate at this time by crisis; the prostration is extreme; but convalescence is rapid. [INFECTIOUS DISEASES 201] Fever.--Sudden onset to even 104 to 105 degrees; steady rise for four or five days with slight morning remissions; terminating by crisis on the twelfth to fourteenth day, falling in some cases below normal; in fatal cases there is a rapid rise to 108 or 109 degrees. The eruption appears on the abdomen on the third to fifth day. Treatment like Typhoid.--Mortality, twelve to twenty per cent. SMALLPOX or Variola.--Smallpox is an acute infectious disease. It has a sudden onset with a severe period of invasion which is followed by a falling of the fever, and then the eruption comes out. This eruption begins as a pimple, then a watery pimple (vesicle) which runs into the pus pimple (pustule) and then the crust or scab forms. The mucous membrane in contact with the air may also be affected. Almost all persons exposed, if not vaccinated, are almost invariably attacked. It is very contagious. It attacks all ages, but it is particularly fatal to young children.