TL;DR: Myiasis, or maggot infestation, is a high-level veterinary emergency that requires immediate medical attention to prevent rapid tissue damage, systemic infection, and life-threatening sepsis.
What is myiasis and how does it affect my pet?
Myiasis is the medical term for an infestation of fly larvae, commonly known as maggots, in living tissue. This typically occurs when flies are attracted to an open wound, skin infection, or even matted fur soiled with urine or feces. The flies lay eggs that hatch into larvae, which then feed on the dog's tissue.
Is finding maggots on my dog a medical emergency?
- Urgency Level: High. Finding maggots in a wound is considered a critical medical emergency.
- Larvae cause rapid and extensive tissue damage in a very short amount of time.
- The infestation releases enzymes and toxins that lead to secondary bacterial infections and severe inflammation.
- If left untreated, the condition can progress to life-threatening shock or sepsis.
How does taking a photo of the affected area help the veterinary triage team?
- A clear, well-lit photo allows staff to assess the severity and depth of the infestation before you arrive.
- It helps the veterinary team prioritize your pet's care immediately upon entry.
- It provides a clinical record of the wound's state before the area is shaved and cleaned.
- It ensures no part of the infestation is overlooked during the cleaning and treatment process.
Clinical Context (Merck Veterinary Manual)
If larvae are detected in wounds, immediate therapy is necessary. Treatment involves clipping the hair coat to determine the extent of the lesion and removing as many larvae as possible. Larvae located deep within tissues must be extracted, potentially requiring sedation or anesthesia. Removed larvae should be killed to prevent pupation. Wounds should be examined on successive days, as adult flies may lay eggs in the wound at different times, resulting in asynchronous hatching of larvae. Broad-spectrum antibiotics are advisable if secondary bacterial or fungal infections are present. Depressed, febrile, and prostrate animals should be treated accordingly.
Chapter: Parasitology, Dermatology, General Principles
Source: The Merck Veterinary Manual, 11th Edition (Page 899)