* Bacteria are living organisms: They are single-celled microbes that exist everywhere in the environment.

* Poisons are substances: They are chemicals that can cause harm when ingested, inhaled, or absorbed.

Here's the connection:

* Some bacteria produce toxins, which are poisonous substances. These toxins can make us sick.

* Examples: * E. coli bacteria can produce toxins that cause food poisoning. * Botulinum toxin, produced by Clostridium botulinum bacteria, is one of the most deadly substances known.

Key takeaway:

* Bacteria themselves are not poisonous.

* Some bacteria produce toxins that can be harmful.