You are here Home Glossary of technical terms Glossary of technical terms invasive disease Listen Print Share Twitter Facebook Email When bacteria are found in the blood, spinal fluid or another part of the body that would normally be sterile. This term is often used in relation to pneumococcal or meningococcal disease. Page history Last updated 11 June 2018 Last reviewed 11 June 2018 Is there anything wrong with this page? Help us improve the Australian Immunisation Handbook What you were doing? (required) What went wrong? (required) Leave this field blank