biotherapy

n. treatment of disease using drugs or vaccines made from live organisms, treatment of diseases using live vaccines or antibiotics; biological therapy, treatment using substances for stimulating the body's immune system to fight infection and cancer or other diseases

Biotherapy is the use of living animals for medical treatment or as an adjunct to medical diagnosis.
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Biotherapy /bio·ther·a·py/ biological therapy. bi·o·ther·a·py n. Treatment of disease with biologicals, such as vaccines. [more]Biotherapy - Community and Resources

Treatment to stimulate or restore the ability of the immune system to fight infections and other diseases. Also used to lessen certain side effects that may be caused by cancer treatment. Also called biological therapy, immunotherapy, or biological response modifier (BRM) therapy. 

Any treatment that involves the administration of a microorganism or other biologic matter.