For catalase-negative, alpha-hemolytic streptococci, the optochin test differentiates; S. pneumoniae is sensitive (positive), while S. viridans is resistant (negative).
Katalaz negatif, alfa hemolitik streptokoklar için optochin testi kullanılır; S. pneumoniae optochin'e duyarlıdır (pozitif test), S. viridans dirençlidir (negatif test).
| Front | Gram positive lab algorithm: Catalase negative Start with ALPHA hemolytic on the left: What test is used to different the species? Now the test can go one of two ways? What is the bug for a negative test? (with 2 species?) What is the bug for a positive test? There is one specific feature about each species. |
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