You are here Home Glossary of technical terms Glossary of technical terms bacteria Listen Print Share Twitter Facebook Email Microorganisms that are smaller than a blood cell, but bigger than a virus; examples of diseases caused by bacteria are diphtheria, tetanus, pertussis, Haemophilus influenzae type b (Hib) and tuberculosis Page history Last updated 11 June 2018 Last reviewed 11 June 2018 Is there anything wrong with this page?