Venereal Diseases.
As mentioned before, there are three venereal diseases, which constitute the main bulk of venereal cases, and which are at the bottom and the cause of most venereal disorders. They are Gonorrhea, Syphilis, and Chancroid. These diseases are produced each by a different and separate kind of germ; they develop independently one from another, and they can never change one into another. But they can coexist in one patient; i. e., a man can get at the same time gonorrhea and Chancroid. If this double infection takes place, then both diseases have to be treated at the same time. The fact that a man has already one disease in a chronic form does not prevent him from getting another. Equally so, the fact that a man has already once had a venereal disease does not prevent him from contracting it a second time, nor does it make it less likely to occur. This is particularly true in the case of gonorrhea and Chancroid, but much less in syphilis, in which an infection for a second time is rather rare.