The incidence of Chorioptes bovis (Acarina: Psoroptidae) on the feet of horses, sheep, and goats in the Netherlands.

The research study examines the prevalence of Chorioptes bovis mites on the feet of horses, sheep, and goats in the Netherlands by comparing varying breeds and locality data. The results indicated infection rates as well as the severity and location of mange-lesions and mites.

Introduction

The study begins with an examination of the prevalence of Chorioptes bovis, a common pest for domesticated animals on the feet of horses, sheep, and goats from diverse locales and breeds in the Netherlands. The focus on feet is because mites of this species tend to favor these areas due to the propensity for skin lesions, known as mange, to occur here.

Findings on Horses

• In horses, the researchers discovered that the Belgian and Frisian breeds were primarily affected, with an infection rate of 40% and 62% respectively.
• Mange-lesions on horses were rarely observed despite the infection.

Findings on Sheep and Goats

• For sheep and goats, the infection rates were higher (63% for sheep and 86% for goats) emphasizing that the mites were more prevalent in these animals.
• Sheep were found to have mites only close to the accessory digits and the claws. The goats had a higher average number of mites which were found on all parts of their feet extending up to the carpal and tarsal joint.
• The highest density of mites in both sheep and goats was just below the accessory digits.
• In the instance where crusts were found, they tended to be minor and concealed beneath the fur. For sheep that remained in housing for prolonged periods, crusts were more commonplace and distinctive than in pastured animals.

Key Observations and Conclusions

• Remarkably, the study observed a negative correlation between the number of mites and the presence and extensiveness of crusts. This might imply that a high amount of mites reduce crust formation or vice versa.
• Given these findings, the researchers concluded that there was no need to classify chorioptic mange in sheep and goats as a reportable disease. This is most likely due to its widespread prevalence and relatively minor health impact on these domestic animals.