Anginosus Information and Courses from MediaLab, Inc.
These are the MediaLab courses that cover Anginosus and links to relevant pages within the course.
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|Illustrated in the upper image are tiny pinpoint 24-hour colonies recovered from one of the splenic abscesses. The wide zones of beta hemolysis are better seen in the close-in view of the 36 hour culture shown in the lower image. Streptococcus anginosus ("milleri" ) can be suspected if one of the following odors is detected:||View Page|
|Most strains of S. anginosus (milleri) carry the F antigen (see image). Rare strains that carry the group A antigen can be differentiated from S. pyogenes by which of the following laboratory tests:||View Page|
|S. anginosus ("milleri") Biochemicals|
The combination of decarboxylation of arginine (red color in the 2nd tube from left compared to the yellow color of the control to its left), the hydrolysis of esculin (black pigment in the esculin agar tube) and the reduction of nitrates to nitrites (red color in last tube on the right) are biochemical characteristics confirmatory for S. anginosus ("milleri").
|Most infections caused by S. anginosus can be effectively treated with penicillin or a first generation cephalosporin.||View Page|
|A clinical condition often associated with Streptococcus anginosus ("milleri") is:||View Page|
Piscitelli SC., Shwed J., Schreckenberger P., Danziger LH. Streptococcus milleri group: renewed interest in an elusive pathogen. European Journal of Clinical Microbiology & Infectious Diseases.11:491-8, 1992 The following review examines the bacteriological characteristics, epidemiology, pathogenicity and antimicrobial susceptibility of the "Streptococcus milleri group". "Streptococcus milleri group" is a term for a large group of streptococci which includes Streptococcus intermedius, Streptococcus constellatus, and Streptococcus anginosus. Usually considered commensals, these organisms are often associated with various pyogenic infections including cardiac, intra-abdominal, subcutaneous and central nervous system infections, particularly with the formation of abscesses. Organisms of the "Streptococcus milleri group" are often unrecognized pathogens due to the lack of uniformity in classifications and difficulties in microbiological identification. Penicillin G, cephalosporins, clindamycin and vancomycin all possess activity against these streptococci. Use of agents with poor activity may promote infections with "Streptococcus milleri group" and allow it to exhibit its pathogenicity. An understanding of these organisms may aid in their recognition and proper treatment.