Mantoux Conversion : Two Mantoux results (not less than eight weeks apart), where the first result is negative and the second is positive (as defined above), and where the second result is greater than the first by 10 mm or more
Ministry of Business, Innovation and Employment, Glossary of terms and acronyms, Wellington, New Zealand 2010. http://wwwsosh.govt.nz/resources/glossary-u.shtml, (Occupn Hlth and Sfty - Brit) {530}