The occurrence of Dictyocaulus arnfieldi in the lungs of horses.
D000818:Animals; D004022:Dictyocaulus Infections / Q000453:epidemiology / Q000662:veterinary*; D005260:Female; D006734:Horse Diseases / Q000382:microbiology*; D006736:Horses; D008174:Lung Diseases, Parasitic / Q000662:veterinary*; D008297:Male