Isolation of Histophilus somni and Trueperella pyogenes from a 2-month-old calf with chronic fibrosing and suppurative epididymitis.

A 2-month-old red Angus crossbred calf was evaluated for a severely swollen scrotum, approximately 30 cm in diameter. Culture of the lesion isolated both Trueperella pyogenes and Histophilus somni. A final diagnosis based on the histopathology report was chronic fibrosing epididymitis with testicular atrophy and mild orchitis.