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February 8, 2012
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Inflammation of the Testicle (Orchitis)

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Orchitis Overview

Orchitis is an inflammatory condition of one or both testicles in males, generally caused by a viral or bacterial infection.

  • Most cases of orchitis are caused by infection with the mumps virus.
  • Orchitis caused by a bacterial infection most commonly develops from the progression of epididymitis, an infection of the tube that carries semen out of the testicles. This is called epididymo-orchitis.
  • The majority of cases of mumps orchitis occur in prepubertal (less than 10 years old) males, while most cases of bacterial orchitis occur in sexually active men, or in men older than 50 years of age with benign prostatic hypertrophy.
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Inflammation of the Testicle (Orchitis)

Escherichia coli 0157:H7 (E. coli 0157:H7) Overview

Escherichia coli (including E. coli 0157:H7) are gram-negative bacteria that are rod-shaped, have the ability to survive in aerobic and anaerobic environments (termed a facultative anaerobe), and may or may not produce flagella and pili (thin hair-like projections) depending on the environmental needs. E. coli strains are found worldwide and live in significant numbers in human and other animals as part of the normal bacterial population of the large intestines. The organisms have likely co-existed with humans for eons, but were first isolated by T. Escherich in 1885; the organisms were named after him. E. coli strains are one of the most frequent causes of several common bacterial infections, including cholecystitis, bacteremia, cholangitis, urinary tract infection (UTI), traveler's diarrhea, and other clinical infections such as neonatal meningitis, pneumonia, abdomin...

Read the E. coli (Escherichia coli 0157:H7, E. coli 0157:H7) Infections article »


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Orchitis »

Orchitis is an acute inflammatory reaction of the testis secondary to infection.

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