Which tapeworm species is required to be reported?

Echinococcus multilocularis is the species that must be reported, primarily due to its zoonotic potential and public health implications. This tapeworm can cause significant health issues in humans, particularly in the form of alveolar echinococcosis, which can be life-threatening if not treated. The requirement for reporting is mandated to help mitigate the spread of this parasite, protect public health, and ensure that appropriate measures are taken for its management.

In contrast, while Toxocara canis is also a zoonotic parasite responsible for concerns like toxocariasis in humans, it is generally more prevalent and less severe compared to the impacts of Echinococcus multilocularis. Dipylidium caninum is mostly of concern in pets but does not have the same level of risk to humans. Giardia lamblia, though a zoonotic concern, is a protozoan rather than a tapeworm and has different reporting requirements.

Therefore, the emphasis on Echinococcus multilocularis highlights its critical role as a public health concern necessitating prompt reporting and intervention.