--subdivision Microbiology under individual animals and groups of animals, individual plants and groups of plants, and under individual diseases, organs and regions of the body, and materials, e.g. Fishes--Microbiology; Corn--Microbiology; Tuberculosis--Microbiology; Heart--Microbiology; Metals--Microbiology
--subdivision Diseases and pests under individual plants and groups of plants, e.g. Corn--Diseases and pests; and names of specific diseases and pests, e.g. Canker (Plant disease)