alpha-hemolytic streptococci

Also found in: Dictionary, Thesaurus, Encyclopedia.
Related to alpha-hemolytic streptococci: streptococcal, nonhemolytic streptococcus, Strep pyogenes

α-hemolytic strep·to·coc·ci

streptococci that form a green variety of reduced hemoglobin in the area of the colony on a blood agar medium.
See also: Streptococcus viridans.

α-hemolytic streptococci

Streptococci that, when grown on blood-agar, produce a zone of partial hemolysis around each colony and often impart a greenish appearance to the agar. Included are S. pneumoniae and viridans group streptococci.
See also: streptococcus
References in periodicals archive ?
9) In aspirates obtained from 108 chronically inflamed maxillary sinuses, Brook and Frazier found that the predominant aerobic isolates were S aureus (12 isolates), alpha-hemolytic streptococci (10), M catarrhalis (8), Hemophilus species (6), and P aeruginosa (3).
Over the course of the next day, the patient was noted to have a bilateral purulent ocular discharge, which grew Hemophilus influenzae and alpha-hemolytic streptococci on culture.
Penicillin is the drug of choice for group A, B, C, G, and H streptococci, alpha-hemolytic streptococci, and most Clostridium spp.