''Haemophilus sommus'' is involved in epididymitis in young rams. It also causes vulvitis, mastitis and reduced reproductive performance in ewes and [[Septicaemia and Enteritis, Bacterial|Septicaemia]], arthritis, meningitis and pneumonia in lambs.
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''Haemophilus sommus'' is involved in epididymitis in young rams. It also causes vulvitis, mastitis and reduced reproductive performance in ewes and [[Septicaemia and Enteritis, Bacterial|septicaemia]], arthritis, meningitis and pneumonia in lambs.