Decrease in number of genital chlamydia cases in Norrbotten, Sweden, October – November 2009: an indirect effect of pandemic influenza A(H1N1)?

A Österlund

doi:10.2807/ese.15.39.19675-en

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Decrease in number of genital chlamydia cases in Norrbotten, Sweden, October – November 2009: an indirect effect of pandemic influenza A(H1N1)?
A Österlund¹
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Affiliations: ¹ Department for Communicable Disease Prevention and Control, County of Norrbotten, Sweden

Correspondence:
A Österlund
anders.osterlund nll.se
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Citation style for this article: Österlund A. Decrease in number of genital chlamydia cases in Norrbotten, Sweden, October – November 2009: an indirect effect of pandemic influenza A(H1N1)?. Euro Surveill. 2010;15(39):pii=19675. https://doi.org/10.2807/ese.15.39.19675-en Received: 15 Sept 2010

Abstract

A sudden reduction in the number of reported genital chlamydia cases was observed in Norrbotten County, Sweden, during October to November 2009. After exploring other possibilities, such as a reduction in the number of chlamydia tests analysed or a new Chlamydia trachomatis variant that had been undetected in standard laboratory tests, it was found likely that the decrease was an indirect effect of the 2009 influenza A(H1N1) pandemic due to reduced social interactions among young adults.