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The name refers to ray-like appearance of the organisms in the granules. About 70% of infections are due to either Actinomyces israelii or A. gerencseriae. [1] Infection can also be caused by Streptomyces somaliensis and Propionibacterium propionicus. The condition is likely to be a polymicrobial anaerobic infection. [2]
Streptomyces is the largest genus of Actinomycetota, and the type genus of the family Streptomycetaceae. [3] Over 700 species of Streptomyces bacteria have been described. [ 4 ] [ 5 ] [ 6 ] As with the other Actinomycetota, streptomycetes are gram-positive , and have very large genomes with high GC content .
It is a commensal and commonly inhabits the human mouth, throat, and upper respiratory tract, as part of the oral microbiota. They are clinically important for humans, as under certain conditions, it can cause opportunistic infections, such as infective endocarditis. [2]
Causes of pneumonia in the elderly. Pneumonia can be caused by a buildup of bacteria, viruses, or fungi in the lungs. There are several types of bacteria that can cause pneumonia, some typical and ...
Mouth infections, also known as oral infections, are a group of infections that occur around the oral cavity. They include dental infection , dental abscess , and Ludwig's angina . Mouth infections typically originate from dental caries at the root of molars and premolars that spread to adjacent structures.
Humans are the primary natural reservoir for group A streptococcus. [17] Other bacteria such as non–group A β-hemolytic streptococci and fusobacterium may also cause pharyngitis . [ 13 ] [ 15 ] It is spread by direct, close contact with an infected person; thus crowding, as may be found in the military and schools, increases the rate of ...
[1] [6] Symptoms usually last 3–5 days, but can be longer depending on cause. [2] [3] Complications can include sinusitis and acute otitis media. [2] Pharyngitis is a type of upper respiratory tract infection. [7] Most cases are caused by a viral infection. [2] Strep throat, a bacterial infection, is the cause in about 25% of children and 10% ...
Bird flu is a scary illness with a high mortality rate. But so far, infections in the U.S. have been relatively mild—until now. A patient in Louisiana has been hospitalized with a severe case of ...