--subdivision Microbiology under individual animals and groups of animals, individual plants and groups of plants, individual diseases and types of diseases, individual organs and regions of the body, and individual materials and types of materials, e.g. Fishes--Microbiology; Corn--Microbiology; Tuberculosis--Microbiology; Heart--Microbiology; Metals--Microbiology
--subdivision Viruses under individual animals and groups of animals and individual plants and groups of plants, e.g. Cattle--Viruses; Fishes--Viruses; Corn--Viruses