text: <unk>  is a species of Gram-positive, rod-shaped bacteria within the<unk> .  Known to live commensally on and within humans,<unk>  is an opportunistic pathogen and a cause of<unk> is.  Many physiologically diverse strains of the species are known to exist, though all are strict anaerobes.
option_0: Actinomyces israelii
option_1: Mycobacterium szulgai
option_2: Legionella micdadei
option_3: Mycobacterium xenopi
option_4: Mycobacterium chelonae
option_5: Sporothrix schenckii
option_6: Candida glabrata
option_7: Mycobacterium malmoense