Which organism is detected by the presence of eggs in a stool sample and is commonly associated with poor hygiene?

The detection of eggs in a stool sample is characteristic of Enterobius vermicularis, also known as the pinworm. This organism is particularly associated with poor hygiene practices, such as inadequate handwashing, which facilitates its transmission. Enterobius vermicularis lays its eggs around the anal area, and these can be transferred to fingers and surfaces, leading to further infections. The eggs are tiny and can easily be spread in environments where sanitation is lacking, particularly in settings with close contact among individuals, such as households or schools.

While other organisms like Giardia lamblia and Ascaris lumbricoides may also be related to hygiene, they are identified through different means. Giardia lamblia typically requires a stool sample analysis for cysts rather than eggs, while Ascaris lumbricoides eggs can be detected in stool but are associated with different transmission routes and often in contexts involving contaminated food or soil rather than direct person-to-person transmission linked to hygiene. The choice of Enterobius vermicularis thus best fits the criteria of being detected by eggs in stool and linked to poor hygiene.