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Epididymitis is usually caused by a bacterial infection that starts in the urethra, bladder, or prostate and ultimately spreads to the epididymis. Depending on the patientâs age, the most common causes of epididymitis are sexually transmitted infection, an enlarged prostate gland, or urinary tract infections.
Infection. In the past, a common cause of swelling and inflammation of the epiglottis and surrounding tissues was infection with Haemophilus influenzae type b (Hib) bacteria. Hib is responsible for a number of serious conditions, the most common of which is meningitis.n adults, other bacteria and viruses also can cause inflammation of the epiglottis, including: 1  Streptococcus pneumoniae (pneumococcus), another bacterium that can cause meningitis, pneumonia, ear infections and blood infection (septicemia).