Aerococcus species are noted for causing urinary tract infections and which cardiac infection?

• A. Pneumonia
• B. Endocarditis
• C. Wounds
• D. Gastritis

Answer: (B)

The main concept here is that some organisms that cause urinary tract infections can also seed the bloodstream and infect the heart valves, leading to endocarditis. Aerococcus species, especially Aerococcus urinae, are Gram-positive cocci that commonly cause UTIs and can produce bacteremia that seeds the heart valves, resulting in infective endocarditis. Endocarditis is an infection of the heart’s valves and inner lining, often presenting after a urinary infection that has spread to the bloodstream. The other options describe infections in different sites (the lungs, skin wounds, or the stomach) and are not the typical cardiac complication associated with Aerococcus.