PLE Category: Microbiology

PLE-3499

At what stage is the patient most infectious?

PLE-3496

Besides retroviruses, which of the following undergoes reverse transcription?

PLE-3497

Which protein mediates the attachment of HIV to the CD4 receptors in helper T cells?

PLE-3494

A sexually active 18-year-old male came to your clinic due to symptoms of painful urination and penile discharge. Gram stain and culture of appropriate specimens showed intracellular diplococci that are able to ferment glucose but not maltose. Which of the following antibiotics will be your drug of choice for the eradication of this microorganism?

PLE-3495

Which drug is used as prophylaxis against Pneumocystis jirovecii pneumonia?

PLE-3493

Which of the following common causative agents of neonatal sepsis is a facultative intracellular rod that exhibits cold enhancement and a narrow zone of beta hemolysis when grown in culture media?

PLE-3490

A 43-year-old male presented to you with acute onset of fever, chills, and productive cough. Physical examination revealed bibasal crackles. On further history taking, you noted that he is fond of collecting exotic fishes and has a large aquarium at home with its own cooling system. To confirm your diagnosis, which of the following culture media would you use to isolate the organism from a sputum sample?

PLE-3491

Which of the following causative agents of pneumonia is typically associated with the production of currant-jelly sputum?

PLE-3492

An 8-year-old boy presented to you with acute onset of fever, cough, sore throat, painful swallowing, and hoarseness. Physical examination showed tender cervical lymph nodes and adherent membranes over his tonsils. You then performed a throat swab to confirm your diagnosis. Microscopic examination of the isolated organism after culturing your specimen would yield characteristic metachromatic granules when stained with which of the following substances?