If a patient with immersion foot shows signs of infection, which bacteria should treatment primarily target?

The treatment for a patient with immersion foot who shows signs of infection should primarily target Staphylococcus aureus, Streptococcus species, and Pseudomonas aeruginosa because these bacteria are commonly associated with skin and soft tissue infections resulting from prolonged exposure to cold and wet conditions, which is characteristic of immersion foot.

Staphylococcus aureus is a common cause of skin infections and can lead to abscess formation and cellulitis. Streptococcus species, particularly Streptococcus pyogenes, are also significant pathogens in skin infections and can cause severe complications if left untreated. Pseudomonas aeruginosa is notable for its association with infections in moist environments and is particularly known for its virulence and resistance to many antibiotics, making it a critical target in cases where the infection may be complicated by conditions such as immersion foot.

Targeting these bacteria is crucial in managing the infection effectively, as they are the pathogens most likely to be responsible for the clinical presentation seen in immersion foot cases.