The types of mutation are morphological and structural mutation, colony mutation, virulence mutation and drug resistance mutation.
1. Morphological and structural variation: the L-form of bacteria shows high polymorphism and is sensitive to osmotic pressure, but it cannot grow in normal medium. The special structure of bacteria, such as pods, bud cells, flagella, etc. will also be mutated.
2. Colony variation: Bacterial colonies are divided into smooth and rough types. Colony variation is common in enterobacteria, such as Salmonella, Shigella and other bacteria.
3. virulence mutation: virulence mutation is manifested as the weakening or enhancement of virulence, which is due to the infringement of the cells by viruses or toxic substances, resulting in mutation of genes, i.e. genetic mutation.
4. Drug-resistant mutation: drug-resistant mutation is the mutation of bacteria sensitive to certain antimicrobial drugs into drug-resistant strains. For example, the resistance of Staphylococcus aureus to penicillin has reached 95%.
All organisms are subject to mutation, so it is recommended that you seek medical attention if you have any symptoms.