In discussing the surgical treatment of chronic seminal vesiculitis it might be well to consider briefly the bacteriology of this condition. The bacteria commonly found producing pathologic changes in the seminal vesicles are the gonococcus, staphylococcus, streptococcus, tubercle bacillus and colon bacillus. Although the gonococcus is by far the commonest cause of seminal vesiculitis, the ordinary pus-producing organisms, namely, the staphylococcus and the streptococcus, not infrequently produce an inflammation of the vesicles. It is in these latter cases that faulty diagnoses are commonly made, especially if they happen to occur in old men, or in those who do not give a history of a recent gonorrhea. The tubercle bacillus may invade the seminal vesicles by way of the blood-stream, by direct extension from the upper part of the genital tract or by extension from the urinary tract.
The part played by the colon bacillus in vesicle infections is not very