Roundworms (see also toxocariasis) infecting the dog include Toxocara canis and Toxascaris leonina. Signs are usually mild, but may include diarrhea, pot-bellied appearance, poor growth, and vomiting.

蛔，又称弓首线，由犬弓首蛔和狮蛔引起的疾。症状通常和，但也可能包括腹泻、腹部胀大、发育迟缓和呕吐。