A geriatric male patient presents to an ophthalmologist with the complaint of conjunctivitis. Gram staining of the ocular swab of the patient revealed abundant polymorphonuclear cells and also a few gram-positive bacilli in the culture. The bacteria were incubated overnight on 5% sheep blood agar medium, and small non-hemolytic colonies were observed. The bacterial isolate was catalase-positive and did not show any growth on MacConkey agar.
Based on the microbiological characteristics of the isolate, what is the most likely pathogen in this case? Option A: Haemophilus influenzae Option B: Actinomyces israelii Option C: Staphylococcus aureus Option D: Corynebacterium macginleyi Option E: Pseudomonas aeruginosa Source: Pathquestions *This patient case is from the editorial team of Docplexus and is meant for educative purposes only. Click here to know the correct answer.
