Can flies cause worms in dogs?

Answered by Willie Powers

Causes of Myiasis (Maggots) in Dogs

Myiasis, also known as maggot infestation, can occur in dogs when female flies, particularly blowflies, lay their eggs in certain conditions. These conditions typically include festering wounds, consistently damp areas of the skin, or areas of skin soiled by urine or feces.

1. Festering Wounds: Flies are attracted to open wounds, especially those that are not properly cleaned or treated. When a wound becomes infected and starts to fester, it provides an ideal environment for flies to lay their eggs. The warmth and moisture of the wound promote the hatching of fly larvae, which then feed on the decaying tissue.

2. Damp Skin: Flies are also attracted to areas of the skin that are consistently damp or moist. This can occur in dogs that have skin folds or wrinkles, particularly in breeds such as Bulldogs or Shar-Peis. The moisture in these areas can be caused by excessive sweating or poor grooming habits, providing an inviting environment for flies to lay their eggs.

3. Soiled Skin: Dogs that have areas of their skin soiled by urine or feces are also at risk of myiasis. The odors and moisture from urine or fecal matter can attract flies, leading them to lay their eggs on the contaminated skin. This is especially common in dogs with diarrhea or incontinent dogs that are unable to keep themselves clean.

It is important to note that not all fly species cause myiasis in dogs. Blowflies, in particular, are known to be common culprits. These flies are attracted to the scent of decaying tissue and thrive in warm, damp environments. However, other fly species, such as flesh flies and screw-worm flies, can also cause myiasis.

Preventing myiasis in dogs involves proper wound care, regular grooming, and maintaining clean and dry living conditions. It is essential to promptly clean and treat any wounds to prevent them from becoming infected and attracting flies. Keeping the dog’s skin clean and dry, especially in areas prone to moisture, can help deter flies from laying their eggs.

Myiasis in dogs is primarily caused by female flies laying their eggs in festering wounds, consistently damp areas of the skin, or areas soiled by urine or feces. Preventive measures and proper wound care can significantly reduce the risk of myiasis in dogs.