Large, rectangular, anaerobic gram-positive rods have been isolated from the anaerobic culture of a wound due to the puncture of the patient's foot by a rusty nail. No spores were observed on Gram stain of the specimen or culture isolate.
The organism produced a double zone of beta hemolysis around its colonies on reducible blood agar. This organism will also be
A) a swarming colony. B) catalase negative.
C) lecithinase negative. D) lipase positive.
Question 2
A pleomorphic gram-negative coccobacillus is isolated from the blood cultures of 58-year-old male who had recent dental surgery. His history is significant for rheumatic fever as a child. The organism only grows on chocolate agar.
It should be tested using
A) ALA and horse blood agar. B) X and V factors and horse blood agar.
C) ALA. D) X and V factor disks.
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