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The African clawed frog Xenopus laevis is by far the most widely used amphibian species in laboratories. In the wild, X. laevis is an asymptomatic carrier of an emerging infectious disease called chytridiomycosis. The vector is the chytrid fungus Batrachochytrium dendrobatidis (Bd), which has devastating effects on wild amphibian populations around the world. The impact of Bd on the metabolism of X. laevis has not been comprehended yet. However, even if asymptomatic, an infection is likely to affect the individual's physiology, immunology, development, reproduction and overall response to stress from a purely medical point of view, which will introduce noise and therefore increase variance within experimental groups of X. laevis. This could have implications on the scientific results from studies using this species. Here, we review the current knowledge on treatments of infected amphibians and propose a hygiene protocol adapted to laboratory populations and amphibian husbandry. Following the presented sanitation guidelines could further prevent the spread of Bd and probably of other amphibian pathogens. The sanitation guidelines will help to reduce the impact of amphibian husbandry on natural populations and must be considered a crucial contribution to amphibian conservation, as today 32% of all amphibians are considered threatened.

Using amphibians in laboratory studies: precautions against the emerging infectious disease chytridiomycosis