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General Microbiology & Immunology (PM 401)         Second level                Semester 4                    2024/2025











































                     3-  Classification based on the host range
                        Based on the type of host, there are four different types of viruses:

                      A-  Animal viruses

                        These viruses infect by invading the cells of animals, including humans.

                      B-Plant viruses

                        These viruses infect plants by invading the plant cells.

                      C- Bacteriophage


                         The virus which infects bacterial cells is known as bacteriophage.






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