Noun
soil-inhabiting saprophytes and disease-producing plant and animal parasites
Source: WordNetPathogenesis Colonies of a gram-positive pathogen of the oral cavity, Actinomyces sp. In the classical sense, six gram-positive genera are typically pathogenic in humans. Source: Internet
The genera Actinomyces, Arthobacter, Corynebacterium, Mycobacterium, and Propionibacterium have cell walls particularly sensitive to breakage during cell division, resulting in gram-negative staining of these gram-positive cells. Source: Internet