• A parasitic infection caused by Toxocara. Humans are infected by the larvae of Toxocara canis and Toxocara cati from dogs and cats respectively. Most cases remain asymptomatic. The parasites may affect the eye, causing diminished vision, or other major organs, causing hepatomegaly, eosinophilia, wheezing, and coughing.
  NCI
  U.S. National Cancer Institute, 2021
• An infection that is caused by the larvae of Toxocara canis (dogs) or Toxocara cati (cats), most cases of which remain asymptomatic. The larvae can infect the eye, causing diminished vision, or other major organs, causing hepatomegaly, eosinophilia, coughing, and wheezing.
  NICHD Pediatric Terminology
  U.S. National Cancer Institute, 2021
• Infection by round worms of the genus TOXOCARA, usually found in wild and domesticated cats and dogs and foxes, except for the larvae, which may produce visceral and ocular larva migrans in man.
  NLM Medical Subject Headings
  U.S. National Library of Medicine, 2025
• Toxocariasis is human infection with nematode ascarid larvae that ordinarily infect animals. Symptoms are fever, anorexia, hepatosplenomegaly, rash, pneumonitis, asthma, or visual impairment. Diagnosis is by enzyme immunoassay. Treatment is with albendazole or mebendazole. Corticosteroids may be added for severe symptoms or eye...
  Merck Manuals
  Merck & Co., Inc., 2025
• Toxocariasis is an infection caused by the ingestion of larvae of the dog roundworm Toxocara canis or the cat roundworm Toxocara cati. The soil of parks and playgrounds is commonly contaminated with the eggs of T canis, and infection may cause human disease that involves the liver, heart, lung, muscle, eye, and brain.
  Medscape
  WebMD, 2025
• Toxocariasis is a parasitic condition caused by the larvae of two species of Toxocara roundworms: Toxocara canis (from dogs) and Toxocara cati (from cats). Many people who are infected with Toxocara never develop any signs or symptoms of the condition. In those who do become sick, symptoms may present as: Ocular Toxocariasis - when the...
  NIH Genetic and Rare Diseases
  National Center for Advancing Translational Sciences