A. CRUMP, TDR, WHO / SCIENCE PHOTO LIBRARY A. CRUMP, TDR, WHO / SCIENCE PHOTO LIBRARY
Animal laboratory. Technician holding a guinea pig Cavia sp. in a laboratory. Guinea pigs are used for various types of research. They are used for genetic manipulations, safety tests on chemicals and drugs, and for the study of infectious organisms. Laboratory guinea pigs are used as experimental animals because they produce a litter of young several times a year. Also their size and relative genetic similarity to humans is ideal for medical and toxicity tests. The technician's clothing helps to maintain clean room conditions. Photographed in Iran.
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