Do not wait for culture results when systemic toxicity present
Patient Discharge Instructions
copy discharge instructions
Home wound care for coral cuts
Keep wound clean and dry between dressing changes
Change dressing daily or when soiled
Rinse gently with clean water before applying new dressing
Avoid submersion in natural water bodies until fully healed
No swimming, snorkeling, or ocean exposure
Shower rather than bathing to avoid prolonged soaking
Apply antibiotic ointment to wound with each dressing change
Thin layer of mupirocin or bacitracin
Do not use for more than 2 weeks
Medication instructions
Take all prescribed antibiotics as directed until finished
Complete the full course even if wound looks better
Do not share antibiotics or save them for later
Take pain medication as needed
Ibuprofen or acetaminophen for wound pain
Take ibuprofen with food to protect stomach
Tetanus vaccination: you may receive this today or soon
Mild soreness at injection site is expected
What to expect during healing
Coral wounds heal more slowly than typical cuts
Superficial wounds typically heal in 2 to 6 weeks
Deeper wounds or those with retained fragments take longer
Some redness and mild swelling around wound edge is normal initially
Should not be spreading or worsening after 24 to 48 hours
Nodules or bumps developing weeks to months later along the limb
Return for evaluation if this occurs (may indicate M. marinum)
Return to emergency department immediately for
Spreading redness, warmth, or swelling beyond wound edges
Red streaking up the arm or leg
Fever above 38 degrees Celsius or shaking chills
Pus or foul-smelling drainage from wound
New blisters or dark discoloration of skin around wound
Severe or worsening pain not controlled with pain medication
Wound opening or falling apart
Numbness, tingling, or loss of movement in fingers or toes near wound
Follow-up instructions
Wound recheck in 48 to 72 hours with primary care or wound clinic
Earlier if any sign of infection develops
Infectious disease referral if prescribed long-term antibiotics
M. marinum treatment requires months of therapy and monitoring
References
Guidelines and key sources
Primary references
Auerbach PS, Marine Envenomations, New England Journal of Medicine, 1991
Foundational reference for marine wound management and antibiotic selection
Includes algorithm for marine envenomation approach
Noonburg GE, Management of Extremity Trauma and Related Infections in the Aquatic Environment, JAAOS, 2005
Aquatic trauma management including coral injuries
CDC Yellow Book 2025, Poisonings, Envenomations, and Toxic Exposures During Travel
Current guidance for travel-associated marine injuries
Mycobacterial infection references
Canetti D et al, Mycobacterium Marinum: A Brief Update for Clinical Purposes, European Journal of Internal Medicine, 2022
Current treatment protocols and diagnostic approach
Lewis FM, Marsh BJ, von Reyn CF, Fish Tank Exposure and M. marinum Infections, Clinical Infectious Diseases, 2003
Treatment and prevention of M. marinum cutaneous infection
Strobel K et al, Diagnosis and Therapy of M. marinum: 21-Year Retrospective, JDDG, 2022
Long-term outcome data and treatment duration guidance
Wound care and foreign body references
Singer AJ, Hollander JE, Quinn JV, Evaluation and Management of Traumatic Lacerations, NEJM, 1997
Evidence base for laceration management principles
Halaas GW, Management of Foreign Bodies in the Skin, American Family Physician, 2007
Foreign body detection and removal techniques
Singer AJ, Dagum AB, Current Management of Acute Cutaneous Wounds, NEJM, 2008
Wound healing science and delayed closure strategy
Antibiotic prophylaxis and infection references
Diaz JH, Lopez FA, Skin, Soft Tissue and Systemic Bacterial Infections Following Aquatic Injuries, American Journal of the Medical Sciences, 2015
Comprehensive review of aquatic wound infections and empiric therapy
Appelbaum RD et al, Antibiotic Prophylaxis in Injury, AAST Critical Care Committee, Trauma Surgery Acute Care Open, 2023
Current guidance on prophylactic antibiotic use in traumatic wounds
Hewett Brumberg EK et al, 2024 AHA and American Red Cross Guidelines for First Aid, Circulation, 2024
Updated first aid guidance including marine injury management
SymptomDx is an educational tool for medical professionals. It does not replace clinical judgment. Verify all clinical data and drug dosages with authoritative sources.