Actinomyces israelii

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Related to Actinomyces israelii: Nocardia asteroides

Ac·ti·no·my·ces is·rae·'li·i

the most common species of actinomyces causing human actinomycosis; it also occasionally infects cattle.

Ac·ti·no·my·ces is·rae·lii

(ak'ti-nō-mī'sēz iz-rā-el'ē-ē)
A species of bacteria causing human actinomycosis and, occasionally, infections in cattle.


James Adolf, German urologist, 1848-1926.
Actinomyces israelii


a genus of non-acid-fast, gram-positive organisms that form a mycelium of branching filaments that fragment into irregular-sized fragments.

Actinomyces bovis
the cause of actinomycosis of cattle and sheep.
Actinomyces congolensis, Actinomyces dermatonomus
see dermatophiluscongolensis.
Actinomyces hordeovulneris
a cause of abscesses, pleuritis and systemic infections in dogs where it is often associated with penetration by grass awns (foxtails) of Hordeum spp.
Actinomyces israelii
an uncommon cause of actinomycosis in cattle and pigs.
Actinomyces necrophorus
see fusobacteriumnecrophorum.
Actinomyces pyogenes
now called Arcanobacterium pyogenes.
Actinomyces suis
the cause of actinomycosis of the swine mammary gland.
Actinomyces viscosus
the cause of periodontal disease in hamsters, and opportunistic infections of dogs.
References in periodicals archive ?
The predominant causative agent of actinomycosis is Actinomyces israelii, which is a Gram-positive, anaerobic, filamentous bacterium that normally colonizes the oral cavity, the gastrointestinal tract, and the vagina.
3) Actinomyces israelii consistently responds well to antibiotic treatment.
The principal agent of human infections is Actinomyces israelii.