Aphrophilus Information and Courses from MediaLab, Inc.
These are the MediaLab courses that cover Aphrophilus and links to relevant pages within the course.
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| Eikenella - catalase & oxidase Eikenella corrodens (E) belongs to the HACEK group of miscellaneous gram-negative bacilli which includes Haemophilus aphrophilus (H), Actinobacillus actinomycetemcometans (A), Cardiobacterium hominis (C) and Kingella kingae (K).Cytochrome oxidase and catalase are two rapid tests that help separate the several members of this group.Eikenella corrodens shows cytochrome oxidase activity, but not catalase activity.
The positive oxidase reaction separates E. corrodens from Haemophilus aphrophilus and Actinobacillus actinomycetemcomitans, which are both negative.A. actinomycetemcomitans is also catalase positive, an additional characteristic separating it from E. corrodens, which is negative.As Kingella kingae is also oxidase positive and catalase negative, other tests are needed for differentiation. K. kingae produces acid from glucose and maltose (E. corrodens is asaccharolytic). | View Page |
| A bacterial isolate that produces pitting of the agar and has a bleach-like odor is probably E. corrodens. Closely related species that must be ruled out include: | View Page |