Mango worms, also known as mango fly larvae or tumbu fly larvae (Cordylobia anthropophaga), are a common parasitic problem in dogs in many tropical regions. They can be alarming for dog owners because the worms develop under a dog’s skin and eventually come out through small holes. Understanding why mango worms infest dogs, why they come out, and how pet owners can prevent this issue is essential for keeping dogs healthy and comfortable.
Although the condition may look frightening, it can be explained clearly through the mango worm’s life cycle and behavior. This article discusses everything you need to know in simple and informative terms.
What Are Mango Worms?
Mango worms are the larvae of the mango fly, a type of parasitic blowfly found mainly in Africa and certain tropical climates. Unlike adult flies, the larvae depend on warm-blooded animals, especially dogs, for development.
Mango flies lay their eggs:
- on soil,
- on sandy areas,
- on clothing or bedding drying outdoors,
- or on surfaces contaminated with urine or feces.
When a dog comes into contact with these surfaces, the larvae quickly attach and burrow into the skin. This marks the beginning of the infestation.
Why Do Mango Worms Come Out of Dogs?
The question many dog owners ask—“Why do mango worms come out of dogs?”—can be answered by looking at the parasite’s growth cycle.
Here’s what happens step by step:
1. Eggs Hatch and Larvae Enter the Skin
Once the eggs hatch, tiny larvae penetrate the dog’s skin. The dog may not feel much initially, so owners may not notice anything right away.
2. Larvae Grow Inside the Dog’s Skin
Inside the skin, each larva creates a small chamber called a boil or furuncle.
This chamber has a tiny hole at the surface so the larva can breathe.
3. Larvae Mature
Over the next 8–12 days, the larvae grow, feeding on the tissue fluids. During this time, the boil becomes larger, red, and sometimes painful. The pressure may cause the dog to scratch, lick, or bite the area.
4. Larvae Come Out to Complete Their Life Cycle
When fully grown, the mango worm needs to leave the dog’s body to continue its development in the soil. That is why mango worms naturally come out of the dog.
They drop to the ground, burrow in, and transform into adult flies.
In simple words:
Mango worms come out because they have finished developing inside the dog and need to return to the soil to become adult flies.
Symptoms of Mango Worm Infestation in Dogs
Dog owners can look for the following signs:
- Small red bumps or boils on the skin
- A tiny hole at the center of the bump (for air)
- Swelling or tenderness
- Discomfort, scratching, or biting at the skin
- Pus or discharge
- Movement inside the boil (in advanced cases)
These symptoms usually appear on areas that easily touch the ground:
- feet
- belly
- back legs
- face
- tail region
How Do Dogs Get Mango Worms?
Dogs usually get mango worms through environmental exposure. Common causes include:
1. Lying on contaminated soil
If a dog rests or sleeps on soil where mango fly eggs were laid, larvae can quickly enter the skin.
2. Outdoor bedding or clothing
Flies lay eggs on fabric. If a dog sleeps on contaminated materials, larvae can infest the skin.
3. Poor hygiene or infrequent grooming
Dirty fur or matted coats provide ideal conditions for larvae to attach.
4. Outdoor lifestyle
Dogs that roam freely or spend much time outdoors have a higher risk.
Is the Infestation Dangerous?
Mango worms are usually not life-threatening, but the infestation can be extremely uncomfortable. If untreated, multiple worms can cause:
- severe itching
- infection
- abscesses
- skin damage
- pain and stress for the dog
The earlier the infestation is noticed, the better the outcome.
Prevention: How to Protect Your Dog from Mango Worms
Prevention is the most effective way to avoid the painful experience of mango worms. Here are practical steps every dog owner can follow:
1. Keep the dog’s sleeping area clean
Avoid letting dogs sleep on bare soil or dirty surfaces.
2. Do not dry clothes or bedding outdoors in areas where mango flies are common
Flies often lay eggs on warm fabric.
3. Regular grooming and hygiene
Brushing, bathing, and routine checks help spot problems early.
4. Use preventive sprays or repellents if recommended by a veterinarian
These create a barrier against flies.
5. Keep the yard or environment clean
Remove waste, standing water, and debris that attract flies.
6. Monitor dogs that roam freely
Check them regularly for bumps or signs of skin irritation.
When to Seek Veterinary Care
If you suspect mango worms, professional help is important. A veterinarian can safely remove larvae, clean wounds, and guide you on preventing re-infestation.
Conclusion
Mango worms come out of dogs because they complete their growth inside the dog’s skin and then exit to continue their life cycle. While the condition can be uncomfortable and alarming, understanding how it happens and how to prevent it helps protect your dog. Regular grooming, clean sleeping environments, and vigilant care are the best defenses against this parasite.
If you ever notice unusual bumps or signs of discomfort in your dog, timely attention can prevent complications and keep your pet healthy.
