bacteriophage virus cycle

phage bacteria bacteriophage virus replicating spread replication bacteriophages viruses phages virology cell wall nucleic acid capsid head bacterial infect infectious antibiotic antibacterial agents bactericidal pathogen pathology dna rna tail fibers viral lytic cycle lysogenic virulent virilent immunization epidemiology immunity immunology therapy treatment biology science microscopic concept medicine medical genetically modified gene genetic engineering genome virion protien coat inside infecting symbol attacks infections bacteriophages