The center makes it the principal aim to ensure the safety of animal experiments which deal with the pathogenic microorganisms and to build up the successful generation of experimental animals, microorganisms and parasites. The building consists of ７ breeding rooms of experimental animals，２ laboratories, one breeding room of snails, one insectarium, two P３‐level biohazard laboratory and breeding room. The air pressure is kept to be always negative to avoid outflow from inside even at entrance to building. Since the building has the most thorough ventilation through HEPA filter, the microorganisms could not leak out to outside of the building. The water used is given chlorination and drained off. The breeding of animals and experiments are done according to the guideline for animal experiment edited by Nagasaki University. The laboratory animals bred in the center are mice, rats, hamsters, rabbits, gerbils, snails and mosquitoes. The center is largely used for the original research by Department of Virology, Bacteriology, Protozoology, Parasitology, Biochemistry, Environmental Physiology and Internal Medicine.