1887

Journal of Medical Microbiology logo

Volume 61, Issue 5

Molecular epidemiological investigation to determine the source of a fatal case of serotype 22F pneumococcal meningitis Free

Abstract

A child’s death due to pneumococcal meningitis after contracting the disease in an after-school programme prompted an investigation to assess nasopharyngeal (NP) carriage among her contacts. The serotype of the meningitis case isolate was determined, together with the serotypes of the NP specimens of contacts, comprising the case patient’s brother, the case patient’s after-school programme contacts and the brother’s day-care centre (DCC) contacts. NP swabs from 155 children and 69 adults were obtained. Real-time PCR and conventional multiplex PCR (CM-PCR) assays were used to detect pneumococcal carriage and determine serotypes. Broth-enriched culture of NP specimens followed by pneumococcal isolation and Quellung-based serotyping were also performed. DNA extracts prepared from cerebrospinal fluid of the index case and from the NP strain isolated from the brother and from one attendee of the brother’s DCC were subjected to genotyping. Pneumococcal carriage assessed by real-time PCR and culture was 49.6 and 36.6 %, respectively (<0.05). Twenty-three serotypes were detected using CM-PCR, with serotypes 6A/6B, 14, 19F, 6C/6D, 22F/22A, 23F and 11A/11D being the most frequent. All eight serotype 22F/22A NP specimens recovered were from children attending the brother’s DCC. The meningitis case isolate and the NP carriage isolate from the patient’s brother were both serotype 22F and shared the same new multilocus sequence type (ST6403) with the attendee of the brother’s DCC. CM-PCR proved to be useful for assessing carriage serotype distribution in a setting of high-risk pneumococcal transmission. The causal serotype appeared to be linked to the brother of the case patient and attendees of his DCC.

  • Received:
  • Accepted:
  • Published Online:
© 2012 SGM
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2012-05-01
2024-04-19
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Molecular epidemiological investigation to determine the source of a fatal case of serotype 22F pneumococcal meningitis
J. Med. Microbiol. 61, 686 (2012); https://doi.org/10.1099/jmm.0.040790-0
/content/journal/jmm/10.1099/jmm.0.040790-0
/content/journal/jmm/10.1099/jmm.0.040790-0
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