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Local outbreak of Streptococcus pneumoniae serotype 12F caused high morbidity and mortality among children and adults

  • T. Ikuse (a1) (a2), R. Habuka (a2), Y. Wakamatsu (a3), T. Nakajima (a3), N. Saitoh (a1), H. Yoshida (a1), B. Chang (a4), M. Morita (a4), M. Ohnishi (a4), K. Oishi (a5) and A. Saitoh (a2)...

Abstract

Pneumococcal serotype replacement is an important issue after the introduction of pneumococcal conjugate vaccine (PCV) in children. After the introduction of 13-valent PCV, the incidence of invasive pneumococcal diseases (IPD) caused by Streptococcus pneumoniae serotype 12F (Sp12F) have increased in some countries; however, an outbreak of Sp12F has not reported in the post-13-valent PCV era. We experienced a local outbreak of Sp12F during March through May 2016 in Tsuruoka city, Japan after the introduction of 13-valent PCV in 2013. The IPD patients were two children and seven adults, three of whom died with a rapid disease progress. Although the clear transmission route was not determined, eight of the nine patients (89%) had close contact with children, which suggests that transmitted colonisation of Sp12F among children and adults might be the source of transmission. Continuous monitoring of IPDs, along with the determination of pneumococcal serotypes, is warranted in the post–13-valent PCV era. New IPD control strategies may be needed if this fatal outbreak continues to occur.

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Copyright

Corresponding author

Author for correspondence: T. Ikuse, E-mail: t.ikuse.634@gmail.com

References

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