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Actinomycetes and Non Sporing Anaerobes
The commonest bacterial cause of cervicofacial actinomycosis is
A. naeslundii
A. viscosus
A. israelii
A. meyeri
Correct Answer:
A. israelii
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Actinomycetes and Non Sporing Anaerobes
Which bacterial group constitutes the predominant normal flora of the human intestinal tract? (Select the organism that is numerically dominant among obligate anaerobes in the gut.)
Among the following anaerobic Gram-negative rods, which species is classified as moderately saccharolytic? (Consider classic oral anaerobe taxonomy and carbohydrate fermentation profiles.)
Which of the following bacteria is acid-fast on staining? (Consider partial/weak acid-fastness with modified methods.)
Which genera are included under the (classic) family Bacteroidaceae? (Consider historically taught groupings used in oral and gut anaerobe taxonomy.)
What is the current genus name for the saccharolytic group formerly placed within Bacteroides? (Recognize the reclassification of oral anaerobes.)
Which organism produces colonies that resemble a “molar tooth” on solid media? (Identify the classic appearance associated with cervicofacial infections.)
Which bacterial colonies show brick-red fluorescence under ultraviolet (UV) light? (Consider classic oral black-pigmented anaerobes.)
Lactobacilli grow best under which culture conditions? (Consider CO2 enrichment and optimal acidic pH supportive of lactic acid bacteria.)
Which is the most common species within the Bacteroides fragilis group that causes human infection?
Which one of the following bacteria is a gram-negative coccus?
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