Giardiasis as zoonosis: between proof of principle and paradigm in the Northwestern region of São Paulo State, Brazil.

Objective: In order to evaluate the potential zoonotic transmission of Giardia duodenalis, isolates from humans and dogs in the Northwestern region of the São Paulo State, Brazil were characterized based on the β-giardin gene.

Methods: The samples were analyzed by sequencing of the Nested-PCR products.

Results: The A1 and A2 subgenotypes were detected in human and dogs.