Pine Processionary Caterpillar

Exposure to the pine processionary caterpillar is a common medical emergency during the spring and summer seasons, when the caterpillar larvae are in their processionary stage. These larvae are equipped with stinging hairs containing a toxic substance that causes severe irritation to the skin, the tissues of the mouth and the throat, and sometimes even severe allergic reactions in dogs. Exposure occurs when dogs come into contact with the larvae or when they try to chew or swallow them.

Symptoms and Diagnosis

The symptoms of exposure to the pine processionary caterpillar include excessive drooling, severe swelling of the mouth and tongue, pain, vomiting and difficulty breathing. In addition, dogs may develop ulcers or necrosis of the tongue and oral cavity. In more severe cases, exposure may cause a life-threatening anaphylactic reaction. The diagnosis is made by a veterinarian through a physical examination of the mouth, tongue and skin, and identification of signs characteristic of exposure to the stinging hairs.

Possible Complications

Without immediate treatment, exposure to the pine processionary caterpillar may lead to severe tissue necrosis, loss of part of the tongue, significant difficulty breathing and secondary infections. In especially severe cases, an acute allergic reaction may cause anaphylactic shock and death.

Treatment

The treatment of exposure to the pine processionary caterpillar includes immediate rinsing of the affected area in order to remove the stinging hairs, and supportive treatment including anti-inflammatory drugs, painkillers and antihistamines. In severe cases, intensive emergency treatment may be required, including administering intravenous fluids, steroids and respiratory support as needed. Do not attempt to remove the hairs with bare hands, since they can cause irritation to humans as well.

Prevention

Preventing exposure to the pine processionary caterpillar includes avoiding walks in areas where there are pine trees infested with larvae during their active season. In addition, it is recommended to instruct dog owners to be familiar with the danger and to be alert to the dog's behavior during a walk. Preventive treatment in the home environment, such as removing larvae from the yard or garden, may reduce the risk of exposure.

Exposure to the pine processionary caterpillar is a dangerous condition for dogs and requires immediate treatment in order to prevent severe complications. Awareness of the danger, preventing exposure and providing appropriate treatment in an emergency can save the dog’s life and prevent long-term damage. During the seasons when the caterpillar larvae are active, it is important to take precautionary measures and to be ready to act quickly in the event of exposure.