i82 INFECTIOUS AND PARASITIC DISEASES. 



crobes which cause suppuration. Occasionally the ex- 

 ternal genitals are the seat of diphtheria. 



In the male, syphihtic and gonorrhoeal lesions of the 

 outside of the penis are common. The interior of the 

 urethra is seldom affected by any other disease besides 

 gonorrhoea. However, chancer (syphilis) of the inside 

 of the urethra is sometimes encountered. 



The bladder in both sexes is frequently the seat of 

 inflammations (cystitis), the infection very often being 

 carried into the bladder by catheterization. Besides 

 getting into the bladder by way of the urethra, however, 

 the infection may come from the blood by way of the 

 kidneys. Tuberculosis of the bladder, a not uncommon 

 infection, usually arises in this way. 

 Animal The round worm has been found in the 



Parasites. vagina. 



Only one congenital disease occurs with 

 Congenital ^^^ degree of frequency, namely, syphilis. 

 Plac Nevertheless, a child may be born with 



Infection. 3,lmost any of the infectious diseases if 



the mother is suffering at the time from the 

 same. Thus, in the new-born has occurred typhoid 

 fever, small-pox, scarlet fever, tuberculosis, etc. In 

 the case of tuberculosis, however, it is surprising how 

 very rarely the disease is found in the children of a 

 consumptive mother; in fact congenital tuberculosis 

 is so uncommon, that tuberculosis is not regarded by the 

 profession as an hereditary disease. 



