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An anuran amphibian, South African clawed frog (Xenopuslaevis), is used to study the immune system, as it possesses a set of acquired immune system represented by T and B lymphocytes and the immunoglobulins. The acquired immune system is impaired throughout the larva and the metamorphosis stage in the amphibians. On the other hand, the role of innate immune system in the tadpole remains unclear....