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Table 2 Aetiology based on standard diagnostic tests grouped by age and study site. N = 1564

From: Acute undifferentiated fever in India: a multicentre study of aetiology and diagnostic accuracy

Diagnose Total N = 1564 5–14 years N = 199 15–59 years N = 1069 >60 years N = 154 Oddanchatram N = 330 Ambur N = 316 Tezpur N = 336 Mungeli N = 62 Anantapur N = 160 Ratnagiri N = 251 Raxaul N = 109
Malaria PCR
 Positive 268 (17) 26 (13) 201 (19) 23 (15) 19 (6) 44 (14) 49 (15) 13 (21) 28 (18) 85 (34) 30 (28)
 Negative 1144 (73) 151 (76) 773 (72) 126 (82) 299 (91) 230 (73) 244 (73) 39 (63) 96 (60) 160 (64) 76 (70)
Malaria microscopy + PCR
 Positive 66 (4) 4 (2) 57 (5) 4 (3) 3 (1) 7 (2) 14 (4) 2 (3) 9 (6) 29 (12) 2 (2)
 Negative 1102 (70) 123 (62) 667 (62) 101 (66) 315 (95) 110 (35) 262 (78) 5 (8) 104 (65) 208 (83) 98 (90)
Bacteraemia
 Positive 124 (8) 13 (7) 102 (10) 4 (3) 31 (9) 9 (3) 36 (11) 0 14 (9) 13 (5) 21 (20)
 Negativea 1037 (66) 136 (68) 691 (65) 108 (70) 297 (90) 300 (95) 12 (3) 5 (8) 98 (61) 214 (85) 80 (73)
Dengue
 Positiveb 244 (16) 3 (2) 39 (4) 1 (1) 25 (8) 59 (19) 19 (6) 3 (5) 54 (34) 76 (30) 8 (7)
 Negativec 1243 (79) 121 (61) 694 (65) 97 (63) 305 (92) 252 (78) 292 (87) 30 (48) 95 (59) 170 (68) 99 (91)
Scrub typhus
 Positived 159 (10) 26 (13) 113 (11) 15 (10) 7 (2) 35 (11) 75 (22) 1 (2) 5 (3) 20 (8) 16 (15)
 Negativee 1281 (82) 155 (80) 879 (86) 130 (86) 307 (93) 267 (84) 220 (65) 32 (52) 147 (92) 217 (86) 91 (83)
Leptospirosis
 Positivef 116 (7) 6 (3) 95 (9) 13 (8) 6 (2) 14 (4) 49 (15) 2 (3) 14 (9) 26 (10) 5 (5)
 Negativeg 1303 (83) 167 (84) 865 (81) 121 (79) 314 (95) 292 (92) 232 (69) 29 (47) 132 (83) 209 (83) 95 (87)
Chikungunya
 Positive 98 (6) 17 (9) 71 (7) 8 (5) 33 (10) 15 (5) 4 (1) 0 29 (18) 13 (5) 4 (4)
 Negative 1389 (89) 170 (85) 955 (89) 142 (92) 284 (86) 296 (94) 308 (92) 34 (55) 124 (76) 238 (95) 105 (96)
  1. Data are given as number and percentages among total of patients with case definitions filled, including those with more than one case definition. Discrepancies between positive plus negative results and total number are due to missing values or inconclusive/discrepant test results
  2. aIncluding contaminants (N = 40). bPositive MAC ELISA and/or RDT. cNegative MAC ELISA and/or RDT. dPositive IFA on ELISA positives. eELISA negatives and positive ELISA/IFA negatives. fPositive MAT on ELISA positives. gELISA negatives and ELISA positive/MAT negatives