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a bacterial species that is the chief causative agent of gas gangrene in humans and a cause of gas gangrene in other animals, especially sheep; it may also be involved in causing enteritis, appendicitis, and puerperal fever; it is one of the most common causes of food poisoning in the U. S. This organism is found in soil, water, milk, dust, sewage, and the intestinal tract of humans and other animals.
Clos·trid·i·um per·frin·gens(klos-trid'ē-ŭm pĕr-frin'jenz)
bacillus(ba-sil'us) (ba-sil'i?, e?) plural.bacilli [L. bacillus, diminutive of baculum, a staff, walking stick]
1. A rod-shaped microorganism.
acid-fast bacillusAbbreviation: AFB
A bacillus not readily decolorized by acids or other means when stained. Mycobacterium tuberculosis is an acid-fast bacillus.