A 6-year-old boy presents with fever and chills, cough, rapid breathing, difficulty breathing, and chest pain. A culture from a respiratory sample shows Gram-positive bacteria. What is the most likely organism causing this infection?
AStreptococcus pyogenes
BStreptococcus pneumoniae
CStaphylococcus aureus
DPropionibacterium acnes
Which pathogen is most commonly associated with a productive cough in chronic bronchitis?
ALegionella pneumophila
BStreptococcus pneumoniae
CHaemophilus influenzae
DMycoplasma pneumoniae
A patient with a cavitary lung lesion who coughs up sputum containing thin, acid-fast positive rods. Which of the following features would most likely be associated with these bacteria?
AWaxy envelope
BStreptokinase production
CToxic shock syndrome toxin production
DNutritional requirement for factors V and X
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