Instructions: Attempt the USMLE (Step 2CK) question(s) below, choose one answer from the choices below and then get the correct answer by clicking get answer button.
Question
A pregnant woman has premature rupture of membranes. Her baby is born 3 days later, at 36 weeks’ gestation. The 5-minute APGAR score is 4. Lung sounds are reduced, and the infant appears to be in respiratory distress. Peripheral blood smear with differential counts demonstrates a neutrophil count of 30,000/mL, with toxic granules evident in many neutrophils. Gram stain of buffy coat demonstrates small gram-positive cocci in chains. Which of the following is the most likely causative organism?
A. Group A Streptococcus
B. Group B Streptococcus
C. Methicillin-resistant Staphylococcus aureus
D. Mathicillin-sensitive Staphylococcus aureus
E. Neisseria meningitidis
