[Prevalence of lungworm D. arnfieldi (Cobbold 1884) in donkeys in Denmark and in horses in herds together with donkeys (author’s transl)].

The research is about the widespread presence of a lungworm, D. arnfieldi, in donkeys and horses in Denmark, studied over a 5-month period. The study revealed that the majority of donkeys were shown to excrete D. arnfieldi larvae without exhibiting any symptoms other than larval excretion. Horses from the same donkey herds and those with chronic cough in the hospital also displayed the same sort of infection which was always accompanied by difficulty in breathing and coughing.

Study Methodology

• The study took place from January to May 1981.
• The subjects of the study were 176 donkeys from 59 herds from various parts of the country.
• Additionally, 106 horses from 30 of the donkey herds were also examined, and 34 other horses showing symptoms of difficulty in breathing and chronic coughing in the hospital.
• Examination of these animals was done at the Institute of Internal Medicine, The Royal Veterinary and Agricultural University, Copenhagen.
• Investigation consisted of examining fecal samples of these animals.

Major Findings

• The investigation showed that 87.5% of the donkeys were excreting D. arnfieldi larvae, often in very large numbers. It emerged that this was the only symptom of the lungworm infection in the donkeys.
• The study found no significant correlation between the excretion of the larvae and factors such as age, gender, or the size of the herd.
• The frequency of D. arnfieldi infection in horses was roughly the same whether they were from herds that also had donkeys or they were horses in the hospital due to chronic coughing. The infection rates in these groups of horses were about 10.4% and 8.8%, respectively.
• The major difference between the infections in donkeys and horses was that horses showed additional symptoms of difficulty in breathing and coughing.

Implications

• This study is a significant revelation about the degree of the presence of D. arnfieldi, a type of lungworm, in donkeys and horses in Denmark.
• For the most part, the donkeys did not show any symptoms other than the excretion of the larvae. On the other hand, the infection in horses was associated with symptoms such as difficulty in breathing and chronic coughing.
• Understanding the prevalence and symptoms of this kind of infection can help improve treatments and preventative methods for lungworm infections in horses and donkeys.