Which common human worm infections are primarily established through the ingestion route, moving through the mouth?
Answer
Roundworms such as *Ascaris* species and pinworms (threadworms)
Many prevalent human worm infections establish themselves via the oral route, meaning the infective stage must be swallowed. *Ascaris* species are typically transmitted when viable eggs contaminate food, water, or hands, subsequently being ingested. Similarly, pinworms, also known as threadworms, spread readily when microscopic eggs are transferred from the anal area onto surfaces or hands and then moved to the mouth, leading to hand-to-mouth transfer. In both cases, the skin barrier is bypassed, and the digestive tract becomes the entry point for infection, often perpetuated by environmental contamination created by an already infected individual.
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