Dermatitis associated with “hypopodes” in a horse: the first case reported in Italy.

This article presents the first known case of dermatitis in a horse caused by a specific stage of a mite, called hypopodes, in Italy. The researchers suggest that these types of infestations might be more common than realized, but lack of awareness could lead to underdiagnosis.

Understanding Hypopodes

• Hypopodes are a special nymph stage of mites from the Astigmata suborder. In this stage, the mite does not feed and has no mouth. Instead, it uses a ventral suctorial plate equipped with suckers and conoids for attaching itself to insects which helps it move around or disperse.
• These mites in their hypopus stage have the potential to infiltrate hair follicles and subcutaneous layers, causing damage similar to a mange lesion.

Dermatitis in Horses Caused by Hypopodes

• This is the first report in Italy of dermatitis in horses related to the presence of hypopodes. Dermatitis is an inflammation of the skin which can cause itching and discomfort.
• Previous reports of similar conditions have blamed an allergic reaction to the bodily fluid of crushed hypopial stages. Hypopial stage forms part of the life cycle of these mites, during which they can cause skin irritation in the host animal.

A Potential for Underdiagnosis

• The study suggests that hypopodes infestations might be common but remain undiagnosed due to the mysterious nature of the condition. Without any clear understanding of the condition, any potential infestations could go unnoted and not treated, affecting the health and well-being of the horse.