What classification does the disease Ascaris fall under?

Ascaris is classified as a parasitic disease. This classification is based on the fact that Ascaris refers to a genus of roundworms, specifically Ascaris lumbricoides, which is known to infect humans and cause ascariasis. Parasitic infections involve an organism living on or in a host organism, obtaining nutrients at the host's expense, which is exactly what Ascaris does. The roundworms reside in the intestines of the host, where they can cause various health issues.

The other classifications—bacterial, fungal, and viral—are not appropriate for Ascaris. Bacteria are single-celled microorganisms that can exist independently or as parasites, fungi are a separate kingdom of organisms that include yeasts and molds, and viruses are tiny infectious agents that require a host cell to replicate. Since Ascaris does not fit into these categories but instead typifies a form of parasitic infection, the classification as parasitic is the correct one.