Which organism is associated with visceral larva migrans?

The organism associated with visceral larva migrans is Toxocara, which is a genus of roundworms commonly found in dogs and cats. Humans can become infected by ingesting the eggs of Toxocara, which can lead to a condition known as visceral larva migrans. This occurs when the larvae migrate through the human body instead of developing into adult worms. The immune response to the migrating larvae can cause various symptoms, often affecting the liver, lungs, and other organs.

Serological testing for Toxocara is a critical tool used to diagnose visceral larva migrans. This involves detecting antibodies against the larvae in the bloodstream, which indicates an immune response to the infection. The presence of these antibodies can help confirm an infection when combined with clinical symptoms and history of possible exposure.

The other organisms listed correspond to different medical conditions and diagnostics. For instance, Onchocerca is related to river blindness, diagnosed using skin snips, while Dracunculus, which causes Guinea worm disease, is diagnosed via skin biopsy. Angiostrongylus, known for causing eosinophilic meningitis, is assessed through CSF examination. Thus, Toxocara is the only organism in the options leading to visceral lar