18.4 Bacteria and Archaea Bacteria are living single-celled prokaryotes. 18.4 Bacteria and Archaea Bacteria Shapes rod-shaped Lactobacilli: rod-shapedSpirochaeta: spiral Spirochaeta: Spiral Enterococci: spherical spiral spherical 18.4 Bacteria and Archaea Bacteria Structures flagellum pili cell wall DNA plasma membrance flagellum pili DNA cytoplasm ribosomes 18.4 Bacteria and Archaea Bacteria reproduce asexually through binary fission. 18.4 Bacteria and Archaea Bacterial Diseases Lyme Disease Ticks Tetanus break in skin TB (tuberculosis) inhaled Strep Throat direct contact with mucus/ wounds Bubonic Plague Food Poisoning (E. Coli, Salmonella) Syphilis sexual activity Chlamydia sexual activity Gonorrhea sexual activity 18.4 Bacteria and Archaea Controlling Bacteria Wash Hands Disinfectants Food Storage (cold) Food Processing (hot) Sterilization (heat) Vaccines Antibiotics 18.4 Bacteria and Archaea Good Bacteria!!!! Decomposers Nitrogen Fixers In human intestines (help digestion, produce vit. K) Used in food production (yogurt, soy sauce, pickles) Clean up oil spills Produce Oxygen (cyanobacteria)