Microbiology 50 Viruses-- Subviral organisms 11 Protozoa 6 Organisms characteristic of specific environments-- ecology 4 microbiology 4 Euglenophyta (Euglenoids) 2 virology 2 Acetabularia 1 Bacteriological Techniques 1 Biotechnology 1 Food Microbiology 1 Fungi 1 Laboratory manual-Microbiology 1 Marine phytoplankton 1 Plant viruses 1 Polyporales-- Fungi 1 Prokaryotes (Bacteria) 1 Prokaryotes(Bacteria) 1 Water Microbiology 1 manual of microbiology 1 marine algae 1 marine plankton 1 methods 1 microbiology--microorganisms 1 microorganisms--evolution 1 parasites 1 river algae 1 viruses 1