Animal diseases can model human diseases {animal model} {model, animal}. Germ-free animals are useful.
variables
Disease progress and outcome depend on species, strain, genotype modifications, gender, and age. Disease agents and treatments have different locations and administration methods.
problems
Animals contract other diseases regularly in laboratory settings, so animals must have no bacteria, such as Helicobacter and Camphlylobacter, or worms, such as Helminthes. Outside organisms can elicit immunologic, inflammatory, and cancerous effects to obviate experiment.
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Date Modified: 2022.0224