A sixty-nine-year-old man with congenital ventricular septal defect was admitted to the hospital because of general fatigue and intermittent fever persisting for about ten months. He was diagnosed as subacute bacterial endocarditis and treated successfully with tetracycline and cephaloridin.
Gram-positive short rods were isolated from the peripheral blood. The morphological findings and biochemical properties are identical with those of Eubacterium Ventriosum.
It is usually found in small intestine of children and in the mucous membrane of the oral cavity of adults, and clinically isolated from pulmonary abscess, purulent pleuritis, cervitis, abscess of oral cavity, or blood of patients with subacute bacterial endocarditis.
The isolates from the patient are small, straight, gram-positive, nonmotile, and anerobic rods which have round ends and an ampulla at mid-portion, and make no spore. As to the biochemical properties, they produce no gas, do not liquefy gelatin, do not coagulate milk, and ferment glucose, saccharose, maltose, fructose, and galactose, but do not mannitol and glycerol.
Furthermore, they do not reduce nitrate, and fail to form hydrogen sulfide and indole.
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