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.

蛔病，又称弓首线病，是由犬弓首蛔和狮蛔引起的疾病。症状通常比较温和，但也可能包、部胀大、发育迟缓和呕吐。