The Bacterial Cell Bacteria are prokaryotic (lack a nucleus) Shape of Bacteria Round – cocci Example – strep – throat (Streptococcus) Shape of Bacteria Rod-shaped - bacilli Example – E. coli (Escherichia coli) Usually found in the intestines Shape of Bacteria Spiral shaped – spirilla Example – Lyme disease (Borrelia burgdorferi) Movement of Bacteria Flagella – a long whip-like structure that helps the cell move by spinning in place like a propeller. A bacterial cell can have many flagella, one or none. If a bacterial cell does not have a flagella, they depend on air, water or clothing to carry them around. Obtaining Food Autotrophs – make their own food. Obtaining Food Heterotrophs – obtain food by eating autotrophs or other heterotrophs. Types of Bacteria Helpful Bacteria Food: cheese, sauerkraut, pickles, sour cream and yogurt Harmful Bacteria Illness and Health –Strep throat and food poisoning Antibiotic A chemical that can kill bacteria.