Transfusion Medicine
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| Topic: Diagnosis | 2016-07-29 | |
| Difficulty: Moderate | ||
| Author: | Carey-Ann Burnham |
|
Question Type: Single Best Answer Please select the single BEST answer choice. |
A 55 year old woman presents to her ophthalmologist with conjunctivitis. An ocular swab is submitted to the laboratory for bacterial culture.
The specimen Gram stain reveals abundant polymorphonuclear cells and few Gram-positive bacilli. After overnight incubation, small, non-hemolytic colonies were observed on 5% sheep's blood agar, a haze of growth was noted on the chocolate agar, and no growth was observed on the MacConkey agar. The isolate was catalase positive.
Based on the clinical and microbiologic characteristics of this case, what is the most likely pathogen?
The specimen Gram stain reveals abundant polymorphonuclear cells and few Gram-positive bacilli. After overnight incubation, small, non-hemolytic colonies were observed on 5% sheep's blood agar, a haze of growth was noted on the chocolate agar, and no growth was observed on the MacConkey agar. The isolate was catalase positive.
Based on the clinical and microbiologic characteristics of this case, what is the most likely pathogen?
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