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Table 3 Clinical characteristics of infants with serotypes Ia, Ib, and III

From: Etiological serotype and genotype distributions and clinical characteristics of group B streptococcus-inducing invasive disease among infants in South China

CharacteristicsSerotype Ia
(n = 14)
Serotype Ib
(n = 12)
Serotype III
(n = 51)
F /χ2 valueP
Laboratory data
 WBCa, mean ± SD, 103/μL15.44 ± 7.7823.13 ± 7.2415.83 ± 8.262.7470.071
 Platelets, mean ± SD, 103/μL357.71 ± 257.28437.25 ± 224.59390.80 ± 218.060.4010.671
 Abnormal PCTb, n (%)2 (14.29)3 (25.00)17 (33.33)2.2300.328
 CRPc, mean ± SD, mg/L32.20 ± 38.8462.29 ± 75.5054.84 ± 66.490.8740.421
Clinical feature
 Fever presentation, n (%)7 (50.00)6 (50.00)31 (60.78)0.8180.664
 Respiratory distressd, n (%)7 (50.00)8 (66.67)15 (29.41)6.4850.039
 Seizure presentation, n (%)1 (7.14)1 (8.33)4 (7.84)0.3411.000*
 Pneumonia, n (%)10 (71.43)10 (83.33)31 (60.78)2.6040.286
 Sepsis, n (%)8 (57.14)6 (50.00)37 (72.55)2.7770.249
 Purulent meningitis, n (%)1 (7.14)3 (25.00)21 (41.18)7.2680.026
 Pneumorrhagia, n (%)0 (0.00)1 (8.33)2 (3.92)1.3110.471*
 Shock, n (%)1 (7.14)2 (16.67)5 (9.80)0.6330.729
 DICe, n (%)1 (7.14)1 (8.33)5 (9.80)0.1080.947
 Total antibiotic duration, mean ± SD, days9.57 ± 5.529.08 ± 4.3612.08 ± 5.862.0710.133
 Length of stay, median (IQR), days12.00
(6.00, 14.25)
9.00
(6.00, 14.25)
14.00
(7.00, 15.75)
2.0430.137
 Mortality, n (%)4 (28.57)0 (0.00)2 (3.92)7.3280.023*
  1. a White blood cells, bProcalcitonin, cC-reactive protein
  2. dRespiratory distress is manifested by rapid breathing, more than 60 breaths per minute, a rapid heart rate, chest wall retractions, expiratory grunting, nasal flaring, and blue discoloration of the skin during breathing efforts
  3. eDisseminated intravascular coagulation
  4. *Fisher’s exact test