| 词条 | Actinomyces israelii |
| 释义 |
| name = Actinomyces israelii | image = Actinomyces_israelii.jpg | image_caption = Scanning electron micrograph of Actinomyces israelii. | domain = Bacteria | phylum = Actinobacteria | ordo = Actinomycetales | familia = Actinomycetaceae | genus = Actinomyces | species = A. israelii | binomial = Actinomyces israelii | binomial_authority = (Kruse 1896) Lachner-Sandoval 1898 }} Actinomyces israelii is a species of Gram-positive, rod-shaped bacteria within the Actinomyces. Known to live commensally on and within humans, A. israelii is an opportunistic pathogen and a cause of actinomycosis. Many physiologically diverse strains of the species are known to exist, though all are strict anaerobes.[1] It was named after the German Surgeon, James Adolf Israel (1848–1926), who studied the organism for the first time in 1878. Pathogenesis{{main|Actinomycosis}}Actinomycosis is most frequently caused by A. israelii. It is a normal colonizer of the vagina,[2] colon, and mouth. Infection is established first by a breach of the mucosal barrier during various procedures (dental, gastrointestinal), aspiration, or pathologies such as diverticulitis. The chronic phase of this disease is also known the "classic phase" because the acute, early phase is often missed by health care providers. This is characterized by slow, contiguous growth that ignores tissue planes and forms a sinus tract that can spontaneously heal and recur, leading to a densely fibrotic lesion. This lesion is often characterized as "wooden". Sulfur granules form in a central purulence surrounded by neutrophils. This conglomeration of organisms is virtually diagnostic of A. israelii.{{citation needed|date=June 2012}} References1. ^Levinson, W. Review of Medical Microbiology and Immunology. 2010:McGraw Hill. 2. ^{{cite book | last = Hoffman | first = Barbara | title = Williams gynecology, 2nd edition | publisher = McGraw-Hill Medical |page=65 |location = New York | year = 2012 | isbn = 0071716726 }} External links
3 : Actinomycineae|Gram-positive bacteria|Bacteria described in 1898 |
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