- Atypical Mycobacterium species found in fresh or salt water (cold or warm)
- Bacteria that causes "fish tank Granuloma"
- Can infect both immunocompetent and immunocompromised hosts
- M. marinum is generally not found in chlorinated swimming pools
- Aquarium workers and enthusiasts
- Handling of contaminated water
- Solitary to multiple superficial red nodules or plaques in exposed areas
- Lesions on the hands and fingers if works with aquariums, or the knees and elbows in swimmers
- Ascending lymphangitis that resembles sporotrichosis
- Hidradenitis suppurativa
- Skin abscess
- Necrotizing soft tissue infections
- Mycobacterium marinum
- Clinical diagnosis in ED
- Can be aided by histopathology
- If there is an affected joint it is important to evaluate for a septic arthritis
- If there are draining wounds consider imaging and evaluate for osteomyelitis
- Long-term antibiotic therapy (2-18 weeks)
- Warm compresses (bacterium is heat-sensitive)
- Unless the patient has evidence of sepsis, severe pain, or has other severe complicating medical problems, outpatient treatment is acceptable.
- M marinum infection may result in non-healing ulcers or a septic arthritis.
- Aggressive or long standing . marinum infection may cause severe osteomyelitis requiring surgical debreedment
- Slany M et al. Mycobacterium marinum infections in humans and tracing of its possible environmental sources. Can J Microbiol. 2012. 58(1): 39-44
- Ryan, J and Bryant G. "Fish tank granuloma - a frequently misdiagnosed infection of the upper limb." J Accid Emerg Med. 1997 Nov; 14(6): 398–400.
- Petrini, B; "Mycobacterium Marinum: ubiquitous Agent of Waterborne Granulomatous Skin Infections." European Journal of Clinical Microbiology and Infectious Diseases. October 2006, Volume 25, Issue 10, pp 609-613
- Rallis, E; Koumantaki-Mathioudaki, E; "Treatment of Mycobacterium Marinum Cutaneous Infections." Expert Opinion on Pharmacotherapy. Volume 8, Issue 17, 2007