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bmic chp1 - Coggle Diagram
bmic chp1
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Gram +ve or Gram -ve?
Gram positive is purple
crystal violet, primary stain
purple due to thick peptidoglycan cell wall, which retains violet stain
Gram negative is pink
safranin, secondary stain
pink due to thin peptidoglycan cell wall, does not retain violet stain and is free to take up pink stain
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How to describe: Gram status + shape of bacterium + arrangement
Example 1: Gram positive cocci in clusters
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Symbiosis
different organisms living tgt and interacting with each other, be it +ve or -ve
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Flora
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Benefits of flora
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Strengthen immune system, induces resistance to infection in the host
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Harmful effects of flora
Under abnormal conditions, normal flora can cause diseases → opportunistic pathogens
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Algae, photosynthetic bacteria are involved in fixing atmospheric CO2