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Table 2 Sputum smear and LJ culture bacillary load by TB-LAMP test result and setting

From: Performance of loop-mediated isothermal amplification assay in the diagnosis of pulmonary tuberculosis in a high prevalence TB/HIV rural setting in Uganda

  TB-LAMP P-value Site P-value
Positive, N = 49 (%) Negative, N = 184 (%) Hospital, N = 126 (%) Health Centre, N = 107 (%)
LJ MTB culture quantification (Colonies)
 Greater than 20 (N = 57) 43 (87.8) 14 (7.6) 0.000 26 (20.6) 31 (29) 0.061
 10-20 (N = 2) 00 02 (1.1)   00 02 (1.87)  
 Less than 10 (N = 1) 01 (2.0) 00   00 01 (0.9)  
Negative/contaminated (N = 173) 05 (10.2) 168 (91.3)   100 (79.4) 73 (68.2)  
Smear microscopy AFB quantification
 3+ 14 (28.6) 00 0.000 07 (5.6) 07 (6.0) 0.867
 2+ 13 (26.5) 00   06 (4.8) 07 (6.5)  
 1+ 06 (12.2) 07 (3.8)   08 (6.4) 05 (4.7)  
 Scanty 03 (6.1) 00   01 (0.8) 02 (1.9)  
Negative 13 (26.5) 177 (96.2)   104 (82.5) 86 (80.4)  
  1. AFB Acid Fast Bacilli, LJ Lowenstein-Jensen