Geographical differences in tonsillar carriage rates of Fusobacterium necrophorum – A cross-sectional study in Sweden and Zambia

David Nygren, Ellen Brorson, Michael Musonda, Lisa Wasserstrom, Åsa Johansson, Karin Holm

Research output: Contribution to journalArticlepeer-review

Abstract

While Fusobacterium necrophorum historically has been considered normal tonsillar flora, recent studies from Europe and the US have suggested that carriage occur transiently in adolescence and young adulthood. However, no studies originating from Africa exist. In this cross-sectional study of tonsillar carriage of F. necrophorum, we aimed to investigate geographical differences in tonsillar carriage rates of F. necrophorum in healthy participants aged 15–25 years in Sweden and Zambia and further investigate the age distribution of tonsillar carriage in Zambia. Specimens were obtained by tonsillar swabs and analyzed with real-time PCR for F. necrophorum. In participants aged 15–25 years, tonsillar carriage was more common in Sweden 21/100 (21%) than in Zambia 6/192 (3%), p < 0.001. In Zambian participants aged above 25 years tonsillar carriage was rare 1/76 (1%). In conclusion, the high rate of tonsillar carriage in participants aged 15–25 years in Sweden has implications on the interpretation of tonsillar findings in patients with pharyngotonsillitis. Interestingly, a geographical difference was found with tonsillar carriage rarely identified in Zambia.

Original languageEnglish
Article number102360
JournalAnaerobe
Volume69
DOIs
Publication statusPublished - 2021

Subject classification (UKÄ)

  • Microbiology in the medical area

Keywords

  • Fusobacterium necrophorum
  • Geographical difference
  • Sweden
  • Tonsillar carriage
  • Tonsillar flora
  • Zambia

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