TL;DR: Myiasis (maggot infestation) is a high-urgency veterinary emergency requiring immediate medical care to prevent deep tissue damage, toxic shock, and life-threatening sepsis.
What is myiasis and how does a maggot infestation occur in dogs?
Finding maggots in your dog's open sore can be a frightening and distressing experience. This condition is medically known as Myiasis. It occurs when flies are attracted to a wound, damp fur, or skin infection and lay their eggs there. Within hours, these eggs hatch into larvae (maggots) that begin to feed on the dog's tissue.
Is a maggot infestation considered a veterinary emergency?
Yes. This is considered a High Urgency emergency. Immediate intervention is required because:
- Maggots often burrow deep into the tissue where they can cause extensive damage.
- The infestation can lead to secondary bacterial infections and the release of toxins into the bloodstream.
- Without immediate veterinary intervention, a dog can go into shock or develop life-threatening sepsis.
Please contact an emergency veterinarian immediately.
How does sending a photo help the veterinary team with triage?
When you call an emergency clinic, the triage nurse may request a clear photo of the wound to help the team:
- Quickly assess the severity of the infestation and the health of the surrounding tissue.
- Determine the potential depth of the wound to prioritize your dog’s arrival.
- Prepare the specific cleaning solutions and surgical tools needed to treat the area effectively the moment you arrive.
Clinical Context (Merck Veterinary Manual)
In cases of myiasis (maggot infestation of wounds), treatment involves clipping the hair coat around the affected area and meticulously removing all larvae; the extracted larvae should be killed to prevent further development. Larvae located deep within tissues must be extracted. Ivermectin at various dosages has shown efficacy in larval mortality. Concurrent broad-spectrum antibiotic administration is advisable if secondary bacterial or fungal infections are present. Preventative measures include treating all skin wounds promptly, confining animals with skin wounds to fly-free areas, maintaining a clean hair coat free of urine or feces, and controlling adult fly populations by eliminating breeding places such as open garbage cans and decaying carcasses.
Chapter: Parasitology, Dermatology, General Principles
Source: The Merck Veterinary Manual, 11th Edition (Page 899)