_Definition._—A specific infectious, contagious disease occurring epidemically, and characterized by a peculiar, spasmodic cough, ending in a whoop. _Cause._—The cause of whooping-cough has always been a matter of conjecture. _Pathology._—In the uncomplicated form there is no lesion which can be said to be characteristic. There might in complications be hemorrhage from the lung. _Treatment._—Disinfect the oral and nasal cavities with embalming fluid. Inject 64 ounces of half strength fluid followed by enough normal fluid to secure preservation. If blood vessels contain much blood, drain from a large vein, and then inject additional fluid to make up for that lost by drainage. Close all openings with absorbent cotton. Discourage public funerals in these cases. For intra-state or inter-state transportation of these cases, govern yourself according to the provisions of your district rules. =Typhus Fever.=—_Synonyms._—Famine fever; Ship fever; Jail fever; Hospital fever; and Putrid fever. _Definition._—An acute, infectious, very contagious, endemic, and also epidemic disease, characterized by a high grade of fever and a peculiar rash. _Cause._—Not known. _Pathology._—The blood is dark and diffluent the result of the intense fever and rapid work of the poison. The liver is somewhat enlarged and softened, as are also the kidneys and spleen. There is an extravasation into the pericardium which gives it an ecchymotic appearance. There is also a slight engorgement and infiltration of the capillaries. The muscular tissues are of a dark red color. The skin shows a characteristic rash and ecchymotic spots are found on the more dependent parts of the body after death. _Treatment._—Slow arterial injection and drainage of blood. On account of rash, apply bichloride of mercury 1 : 500. In the presence of fermentation, give the abdomen a special treatment. For transportation of bodies dead of this disease, govern yourself according to the provisions of the transportation rules. =Varicella.=—_Synonym._—Chicken-pox. _Definition._—An acute, specific, and infectious disease, characterized by an eruption that rapidly passes through the stage of papule, vesicle, and pustule, and terminates by dessication. _Cause._—This is not known. All attempts to isolate the microorganisms or the contagium, whatever that may be, have failed. _Pathology._—The only pathological lesion is the eruption that appears on the skin.