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How Bacteria Make Us Sick

This overview explores how bacteria enter the body and cause illness. Bacteria can enter through ingestion or skin breaks, finding the warm and moist environment inside our bodies suitable for rapid reproduction. Once inside, bacteria produce enzymes and toxins that disrupt normal bodily functions. For instance, Helicobacter pylori neutralizes stomach acid but can damage intestinal walls, while Clostridium botulinum releases powerful toxins leading to serious conditions like botulism. Understanding these pathways can help us recognize the dangers posed by bacteria.

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How Bacteria Make Us Sick

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  1. How Bacteria Make Us Sick

  2. Exposure • A bacterial cell has to first enter our body, this can happen through: Ingestion A break in the skin (Cut or wound)

  3. Inside Our Body • Warm (37 C) • Moist • Lots of food! (sugars) • This makes our insides the ideal breeding ground for bacteria

  4. Once inside • The bacteria begin to reproduce…Very Quickly!

  5. How Bacteria Cause Illness • 1. They can produce Enzymes • Ex: Helicobacter pylori produces an enzyme that neutralizes stomach acids…unfortunately it also destroys the lining of the intestinal wall

  6. Flesh Eating Disease •  The medical name for this disease is necrotizing fasciitis (NF) and it is caused by a bacterium called Streptococcus pyogenes,

  7. 2. Some produce toxins (poisons) that kill cells. Clostridium botulinum bacteria produce botulinum toxin, the most powerful toxin known to humankind. They cause the disease called botulism Exotoxins are poisons released by live bacteria. Endotoxins are poisons released when the bacteria die.

  8. 3. Body Become Overwhelmed Too many bacteria interrupt normal bodily functioning

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