Which is the bacteria that is most concerning regarding a plantar puncture wound to the sole of the foot through a rubber soled shoe and virtually unique to that specific skin injury?

Pseudomonas aeruginosa.

Explanation:

Pseudomonas aeruginosa is a gram negative, rod shaped bacteria that proves to be pathogenic for plants, humans and other organism. This bacteria is a multi drug resistance pathogen.

Pseudomonas aeruginosa causes osteomyelitis that involves the plantar puncture to the foot sole. The bacteria can cause specific skin injuries and more risk is present in the diabetic patients. This bacteria can also cause various post operative injuries.

Thus, the answer is Pseudomonas aeruginosa.