A 51-year old healthy male received a minor abrasion at a local physical fitness

Question

A 51-year old healthy male received a minor abrasion at a local physical fitness center that resulted in a raised hard lesion on his thigh. He visited his primary care physician, who drained the lesion and prescribed an oral first-generation cephalosporin commonly used for skin infections and lesions. The patient was asked to drain the lesion daily and wipe the affected area with disposable clindamycin medicated pads. He was instructed to keep the infected area covered with a clean dry bandage and to no participate in any athletic activity unless he could keep the wound dry and covered. He was also told to practice good personal hygiene after cleaning the wound and to avoid shared items. A culture was performed, and catalase, coagulase" gram cocci were isolated. Antimicrobial susceptibility testing showed the isolate was resistant to penicillin, oxacillin, and erythromycin and sensitive to clindamycin. Further testing by a double disk diffusion showed the isolate was positive for inducible clindamycin resistance

Explanation / Answer

A 51 year old healthy male received a minor abrasion at a local physical fitness center that initially resulted in raised hard lesion in his thigh. The organism that could have likely caused this condition could be staphylococcus aureus is it is commonly found in the skin surface. It is a gram positive cocci arranged in clusters. Biochemical tests showed that the bacteria was catalase and coagulase positive which also point towards the presence of staphylococcus aureus. Further, S.aureus is notorious for the development of resistance towards many drugs like penicillin and cephalosporins.

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