Can bilharziasis of the seminal vesicles be a cause of obstructive infertility?

In patients with bilharzial seminal vesiculitis, it has been proved by the fructose test, seminal vesiculography, and casting that the vesicular and ampullary canals as well as the ejaculatory ducts are patient. Thus bilharziasis plays no role in the production of obstructive infertility in males.