MICROBIOLOGY. Pathogens and Viruses. Prokaryote vs. Eukaryote. Prokaryotes (Bacteria). Fossil evidence shows that bacteria have been on the earth for over 3.5 billion years Three major shapes Cocci (round) Bacilli (rod-like) Spirilla (spiral). HARMFUL BACTERIA.
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Pathogens and Viruses
1) WASH your hands when they are dirty and BEFORE eating. 2) DO NOT cough into your hands. 3) DO NOT sneeze into your hands. 4) DO NOT put your fingers into your eyes, nose, or mouth.