Table 2

Bacteria isolated and prevalence weighted for study sample size

PathogenNeonates (0–1 month)Infants (>1 month)
Number of isolatesWeighted prevalence % (95% CI)Number of isolatesWeighted prevalence % (95% CI)
Staphylococcus aureus77226 (18 to 34)14822 (12 to 32)
Klebsiella spp.‡65521 (15 to 26)10310 (5 to 15)
Escherichia coli2448 (6 to 10)10410 (4 to 16)
Salmonella spp.1553 (1 to 4)1428 (1 to 15)
Streptococcus pneumoniae1082 (1 to 2)1489 (4 to 14)
Streptococcus agalactiae (group B streptococcus)1792 (1 to 3)2<1
Streptococcus pyogenes871 (1 to 2)342 (0 to 4)
Pseudomonas spp.832 (1 to 3)404 (1 to 7)
Other streptococci762 (1 to 3)333 (1 to 6)
Haemophilus influenzae5<1724 (1 to 7)
Acinetobacter spp.59<1162 (0 to 3)
Coagulase negative staphylococci601 (0 to 2)91 (0 to 2)
Enterobacter spp.541 (0 to 1)131 (0 to 1)
Citrobacter spp.28<1171 (0 to 3)
Chromobacterium spp.15<15<1
Serratia spp.19<10<1
Proteus spp.13<14<1
Enterococcus14<100
Neisseria meningitidis2<13<1
Flavobacterium spp.3<10<1
Other Gram-positive organisms*891 (0 to 2)0<1
Unidentified Gram-negative organisms†3577 (4 to 9)797 (2 to 12)
Total3077972
  • *Unspecified Gram-positive bacteria.

  • †Unidentified Gram-negative organisms included data reported as enteric Gram-negative bacilli, ‘coliforms’ and ‘other Gram-negative organisms’.

  • ‡90 of the Klebsiella isolates in infants aged 1–12 months were from one study (Sharma et al28).