KnowldegeSPONTANEOUS GENERATION, GERM THEORY OF DISEASE, CULTURE OF BACTERIA, CLASSIFICATION OF MICROORGANISM, VIRUSES, PROCURYOTES, EUCARYOTES, BACTERIOLOGY, MORPHOLOGY OF BACTERIAL CELL, ULTRA STRUCTURE OF THE BACTERIAL CELLS, ENDOSPORE, ECONOMIC IMPORTANCE OF BACTERIA, MORPHOLOGY, INTERFERONS, PLANT VIRUSES, TRANSMISSION OF VIRUSES, ANIMAL VIRUSES, REPLICATION OF VIRUSES, SYMPTOMS OF VIRUSES.