INDEX OF INFECTIOUS DISEASES. 683 



Tetanus. Due to infection by the tetanus bacillus, 388. 



Texas Fever in Cattle. Due to infection by a blood parasite 

 belonging to the protozoa, described by Smith under the name of 

 pyrosoma bigeminum. 



Tonsillitis. (See Angina. ) 



Trachoma. Various micmcocci have been found in trachoma 

 by different investigators and claimed by them to cause the affection, 

 According to Fuchs and Hoor, trachoma is frequently, if not always, 

 due to infection by the gonococcus 



Tuberculosis. All forms of tubercular infection in man and 

 animals are due to the bacillus tuberculosis. The bacillus which 

 causes tuberculosis in cattle, 299, and the one which produces it in 

 fowls, 300, though closely resembling the tubercle bacillus in man, 

 possess some slight differences. 



Typhoid Fever. Due to infection by bacillus typhi abdomi- 

 nalis, 402. 



Typhus Fever. The specific causative agent of this, under 

 certain circumstances, extremely infectious disease has not yet been 

 determined. 



Varicella. No micro-organism has been demonstrated to bear 

 any relation to the etiology of this affection. 



Variola and Vaccinia. Probably due to protozoa, 651. The 

 common pus cocci and various other micro-organisms are found in 

 the characteristic pustular eruption ; their presence is due to sec- 

 ondary infection of the pustules, and has nothing to do with the 

 cause of the disease, 657 



Whooping-cough. Considered by Koplik and others to be due 

 to a small bacillus found in the nasal and bronchial secretions in 

 cases of the disease, 613. 



Wool-sorter's Disease. Due to anthrax bacillus. 



Yellow Fever. Sanarelli ( 1 897 ) discovered a small bacillus, 609, 

 in the blood and tissues of yellow fever cadavers, which he named 

 "bacillus icteroides," and claimed to be the specific cause of yellow 

 fever, 609. 



