- Rapid growth, thriving: Compared with other organisms, the microorganism growth rate and proliferate extremely loud.
- wide distribution, multiple categories: microorganisms distributed everywhere Left over dat.Chung diverse and abundant type.
During live operation, besides the useful features, microorganisms can cause harm to humans, animals and plants, such as altering substances of drugs, destroying the food, some of which may cause diseases or toxins harmful
to serve the food and drug testing in the microbiological testing we need to find out some key characteristics of 2 groups microorganisms are bacteria and fungi.
- Resilience powerful and easy variation arises: Resilience of microbial far more than animals and plants. In the long-term evolution, VSV have created for themselves the regulatory mechanisms of metabolism to adapt to the living conditions are very unfavorable. It was realized that the amount of enzyme adaptation, comprising 10% of the protein in living cells. Adaptation of microorganisms sometimes beyond human imagination. Most microorganisms can retain vitality in the temperature of liquid nitrogen (-1960C), even at temperature of liquid hydrogen (-2530C).
VSV easy variation arises because usually unicellular, haploid , faster growth, greater numbers, in direct contact with the environment. Common variation form is mutation and lead to changes in the morphology, structure, type of metabolism, metabolic products, antigens, the resistance, ... Such as new search the fertility of filamentous fungal antibiotic Penicillium chrysogenum, it extracts to yield 20 units of penicillin in 1 ml of fermentation.
4.1.2. Bacteria (Bacteria)
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