• Epidemiological Classification of Zoonoses (Schwabe's Classification):
• Cyclozoonoses: Diseases that require more than one vertebrate host species (obligatory multi-vertebrate cycle), but no invertebrate vector, to complete the developmental cycle of the infectious agent. Taeniasis (Taenia saginata: human-bovine; Taenia solium: human-swine) and Echinococcosis (canid-ungulate) are classic cyclozoonoses.
• Definitions of Other Categories:
• Direct Zoonoses: Transmitted from an infected vertebrate host to a susceptible vertebrate host via contact, fomite, or mechanical vector without developmental changes (e.g., Rabies, Brucellosis).
• Metazoonoses: Require both a vertebrate host and an invertebrate vector for biological development/transmission (e.g., Arboviruses, Leishmaniasis).
• Saprozoonoses: Require a non-animal environmental reservoir/medium (soil, organic matter) for development (e.g., Anthrax, Histoplasmosis).

Correct option: (2) Cyclozoonoses