Testing for strongyloidiasis is a set of laboratory tests designed to diagnose infection with the roundworm parasite *Strongyloides stercoralis*. Diagnostic methods include direct microscopic examination of stool samples for larvae, concentration techniques to increase sensitivity, culture, and antibody tests in blood (such as ELISA). The infection is considered chronic due to the parasite's ability to self-replicate within the host (autotrophic cycle), which can lead to severe infection in immunocompromised individuals.