Cronobacter spp. have frequently been linked to which of the following?

• A. Infections in infants due to contaminated formula
• B. Pneumonia in coal miners
• C. Wound infections associated with marine water
• D. Wound infections following contact with dogs

Answer: (A)

The key idea is that Cronobacter spp. are most famously linked to severe infections in newborns caused by contaminated powdered infant formula. These bacteria can survive drying and persist in dry, powdered formula products. When infants are fed reconstituted formula that is contaminated, they can develop serious infections such as meningitis and septicemia, and in some cases necrotizing enterocolitis. This strong, well-documented association makes infections in infants due to contaminated formula the best match for Cronobacter.

The other scenarios involve different pathogens or risk factors. Pneumonia in coal miners is typically related to inhalation exposures from dust or other environmental factors, not Cronobacter. Wound infections from marine water or from dog contact point to organisms associated with those environments (like Vibrio or Pasteurella species), rather than Cronobacter.