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Volume 22, Number 10—October 2016
Dispatch

Hypervirulent Clone of Group B Streptococcus Serotype III Sequence Type 283, Hong Kong, 1993–2012

Margaret IpComments to Author , Irene Ang, Kitty Fung, Veranja Liyanapathirana, Ming Jing Luo, and Raymond Lai
Author affiliations: Chinese University of Hong Kong, Hong Kong, China; and Prince of Wales Hospital, Hong Kong

Main Article

Table 1

Invasive potential of individual group B Streptococcus serotypes among neonates, nonpregnant adults and pregnant women, Hong Kong, 1993–2012*

Serotype Odds ratio (95% CI), p value
All patients, n = 1,645 Neonates, n = 249 Nonpregnant adults, n = 692 Pregnant women, n = 704
Ia 0.6 (0.4–0.8), <0.001 0.7 (0.4–1.4), 0.37 0.4 (0.2–0.6), <0.001 1.0 (0.6–1.6), 0.94
Ib 1.0 (0.7–1.3), 0.92 1.1 (0.5–2.5, 0.74 1.2 (0.8–1.8), 0.30 0.7 (0.4–1.3), 0.30
II 0.9 (0.6–1.3), 0.49 0.2 (0.1–0.5), <0.01 0.9 (0.5–1.6), 0.76 2.0 (1.0–3.7), <0.04
III-1 1.1 (0.8–1.5), 0.69 1.2 (0.6–2.3), 0.65 1.3 (0.8–2.1), 0.33 0.8 (0.4–1.6), 0.58
III-2 1.5 (1.1–2.1), <0.01 5.3 (2.7–10.3), <0.001 0.5 (0.3–1.0), <0.05 1.4 (0.8–2.5), 0.22
III-3 1.1 (0.4–2.9), 0.83 8.6 (0.4–169.2), 0.16 0.8 (0.2–3.3), 0.79 0.4 (0.0–6.3), 0.49
III-4 19.4 (9.1–41.2), <0.001 6.3 (0.7–54.3), <0.01 18.4 (7.7–43.9), <0.001 6.3 (0.4–101.8), 0.19
IV 0.1 (0.0–2.2), 0.16 0.4 (0.0–9.9), 0.57 0.2 (0.0–4.2), 0.32 0.6 (0.0–10.2), 0.70
V 0.6 (0.5–0.9), <0.02 0.1 (0.0–0.4), 0.001 0.9 (0.5–1.4), 0.60 0.8 (0.4–1.6), 0.56
VI 0.8 (0.4–1.5), 0.51 0.2 (0.0–2.0), 0.19 1.0 (0.5–2.2), 0.95 0.7 (0.4–2.8), 0.57
VII 2.3 (0.7–7.6), 0.17 0.4 (0.0–9.9), 0.57 14.5 (0.7–282.2), 0.08 2.5 (0.5–13.2), 0.27
VIII 0.1 (0.0–2.2), 0.16 0.4 (0.0–9.9), 0.57 0.2 (0.0–4.2), 0.32 0.6 (0.0–10.2), 0.70
IX 0.9 (0.0–22.7), 0.96 1.2 (0.0–61.1), 0.93 2.0 (0.0–103.5), 0.72 2.1 (0.1–51.3), 0.66
NT 1.4 (0.1–15.3), 0.79 1.2 (0.0–61.1), 0.93 2.1 (0.1–33.0), 0.61 2.1 (0.1–51.3), 0.66

*Bold indicates statistical significance; p values determined by Fisher exact or χ2 test.

Main Article

Page created: August 24, 2016
Page updated: August 24, 2016
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