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.

虫病，又称首线虫病，是首虫和狮虫引起的疾病。症状通常比较温和，但也可能包括腹泻、腹部胀大、发育迟缓和呕吐。