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Table 3 Quality control for TB slide examination from TB Diagnosis and Treatment Center (CDT) sites*

From: Strengthening systems for communicable disease surveillance: creating a laboratory network in Rwanda

Year Number of CDT sites participating in QC Number of TB slides (specimens) Percent (%) TB-smear positive Percent (%) with false positive result Percent (%) with false negative result Overall performance
2003 60 No records available     
2004 134 No records available     
2005 147 3622 13.7% 6.4% 2.6% Not rated
2006 173 7370 11.3% 4.1% 1% Good
2007 183 9057 6.6% 2.7% 0.5% Good
  1. *The NRL was initiated in 2003 and organization of the network began in 2004. The lab network was able to begin reporting number of specimens by 2005. We attribute the gradual decrease from 13.7% to 6.5% to comprehensive training of laboratory technicians and to the national TB program in its goals for reducing spread of TB.