Which pathogen causes "fish tank granuloma" thriving in cooler injury areas?
Answer
*Mycobacterium marinum*
In rare but severe cases, a chronic, non-healing wound resulting from coral contact can become colonized by opportunistic pathogens. A specific concern is *Mycobacterium marinum*, the agent responsible for what is known as "fish tank granuloma." This particular bacterium thrives in cooler temperatures, frequently affecting cooler extremities of the body, such as the hands, knees, and elbows. When this infection occurs, it presents as red, bumpy nodules. A critical diagnostic feature is that infections caused by *M. marinum* often do not respond well to standard antibiotic treatments, necessitating a specific diagnostic inquiry from a healthcare provider.
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