bacteriophage and phage virus background

phage bacteriophage virus bacteriophages viruses phages virology bacterial infect bacteria infectious antibiotic antibacterial agents bactericidal pathogen pathology dna rna capsid 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 replication protien coat background blue infects symbol attacks infections