2932260 Bacteria are invisible to the naked eye. patgfisher 1 1209655 Bacteria are everywhere. CK 681666 Bacteria are microscopic organisms. Source_VOA 35480 Bacteria will not breed in alcohol. CM 35401 Pasteur experimented with bacteria. CM 680328 That disease is caused by bacteria. Source_VOA 680327 We need to keep bacteria out of food. Source_VOA 1220341 Viruses are much smaller than bacteria. CK 35479 Bacteria are invisible to the naked eye. alexmarcelo 680326 Hand washing is one way to control bacteria. Source_VOA