what is microbiology, immunology and molecular genetics major
An agar plate streaked with microorganisms. Microbiology (from Greek Î¼á¿ÎºÏÎ¿Ï, mÄ«kros, small; Î²Î¯Î¿Ï, bios, life; and -Î»Î¿Î³Î¯Î±, -logia) is the study of microscopic organisms, those being unicellular (single cell), multicellular (cell colony), or acellular (lacking cells). Microbiology encompasses numerous sub-disciplines including virology, mycology, parasitology, and bacteriology.