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Table 3 Contribution of the alternative methods to the diagnosis of pneumococcal CAP

From: Detection and serotyping of pneumococci in community acquired pneumonia patients without culture using blood and urine samples

    All conventional tests Blood culture BinaxNow Sputum culture
   Total Pos N (%) Neg N (%) Pos N (%) Neg N (%) Nd N Pos N (%) Neg N (%) Nd N Pos N (%) Neg N (%) Nd N
  Total 309 64 245 28 273 8 52 255 2 15 279 15
qPCR Pos 16 13 (29) 3 (02) 9 (45) 4 (2) 3 10 (29) 6 (3) 0 4 (33) 9 (5) 3
  Neg 195 32 (71) 163 (98) 11 (55) 180 (98) 4 24 (71) 169 (97) 2 8 (67) 176 (95) 11
  Nd 98 19 79 8 89 1 18 80 0 3 94 1
IMIA Pos 39 20 (43) 19 (11) 11 (55) 27 (14) 1 16 (41) 23 (13) 0 3 (38) 32 (16) 4
  Neg 184 27 (57) 157 (89) 9 (45) 171 (86) 4 23 (59) 161 (86) 0 5 (62) 172 (84) 0
  Nd 86 17 69 8 75 3 13 71 2 7 75 4
MIA Pos 37 19 (40) 18 (15) 9 (43) 26 (10) 2 13 (36) 23 (9) 1 6 (40) 23 (9) 8
Neg 134 29 (60) 105 (85) 12 (57) 230 (90) 4 23 (64) 222 (91) 1 9 (60) 232 (91) 5
  Nd 138 16 125 7 17 2 16 10 0 0 24 2
  1. Pos: positive, Neg: negative, Nd: not done/not available.