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Cat scratch disease
Question | Answer |
---|---|
What are the two main pathogens related to cat scratch disease? | Bartonella henselae Afipia felis |
How do you differentiate these two organisms? | B. henselae is curved GNR that grows at 35-37 C, oxidase and urea - A. felis is GNR that grows at 25 and 30 C, oxidase and urea + |
What are the criteria of B. henselae clinical diagnosis? | -Cat contact with the presence of scratch -Positive skin test -Negative results for other causes of lymphadenopathy -Characteristic histopathology of the lymph node *3 out of 4 is needed for diagnosis |
Which lymph nodes are mostly involved in this disease? | Lymph nodes in head, neck or upper extremitis |
Describe the motility and BAP colony formation of B. henselae. | Twitching motility. Small, deeply folded cauliflower-like colonies |