
какие бактерии положительные и отрицательные


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Positive and Negative Bacteria
Bacteria can be classified into two main groups: positive and negative bacteria. These classifications are based on the structure of their cell walls and their response to a specific staining technique called the Gram stain.
Positive Bacteria: Positive bacteria, also known as Gram-positive bacteria, have a thick peptidoglycan layer in their cell walls. This layer retains the crystal violet stain used in the Gram stain, causing the bacteria to appear purple under a microscope. Some examples of positive bacteria include Staphylococcus aureus, Streptococcus pyogenes, and Bacillus subtilis.
Negative Bacteria: Negative bacteria, also known as Gram-negative bacteria, have a thinner peptidoglycan layer in their cell walls. This layer does not retain the crystal violet stain, but instead takes up the counterstain called safranin, causing the bacteria to appear pink or red under a microscope. Some examples of negative bacteria include Escherichia coli, Salmonella enterica, and Pseudomonas aeruginosa.
It's important to note that the classification of bacteria as positive or negative is based on their response to the Gram stain and the structure of their cell walls. It does not necessarily indicate the positive or negative effects of these bacteria on human health or the environment.
I hope this information helps! Let me know if you have any other questions.


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