J11 91. Partially acid fast

Q: A patient presents to the emergency department with history of persistent fever and cough. Radiological features are suggestive of pneumonia. Sputum examination reveals aerobic branching gram positive filaments, that are partially acid fast. Which of the following is the most likely etiological agent:

(a) Actinomyces israeli
(b) Nocardia asteroides.
(c) Aspergillus fumigatus.
(d) Staphylococcus aureus.


                                                                                                   A: b. Nocardia...