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Abstract

Background

In a study from 2013 that prioritised communicable diseases for surveillance in Sweden, we identified Lyme borreliosis as one of the diseases with highest priority. In 2014, when the present study was designed, there were also plans to make neuroborreliosis notifiable within the European Union.

Aim

We compared possibilities of surveillance of neuroborreliosis in Sweden through two different sources: the hospital discharge register and reporting from the clinical microbiology laboratories.

Methods

We examined the validity of ICD-10 codes in the hospital discharge register by extracting personal identification numbers for all cases of neuroborreliosis, defined by a positive cerebrospinal fluid–serum anti- antibody index, who were diagnosed at the largest clinical microbiology laboratory in Sweden during 2014. We conducted a retrospective observational study with a questionnaire sent to all clinical microbiology laboratories in Sweden requesting information on yearly number of cases, age group and sex for the period 2010 to 2014.

Results

Among 150 neuroborreliosis cases, 67 (45%) had received the ICD-10 code A69.2 (Lyme borreliosis) in combination with G01.9 (meningitis in bacterial diseases classified elsewhere), the combination that the Swedish National Board of Health and Welfare recommends for neuroborreliosis. All 22 clinical laboratories replied to our questionnaire. Based on laboratory reporting, the annual incidence of neuroborreliosis in Sweden was 6.3 cases per 100,000 in 2014.

Conclusion

The hospital discharge register was unsuitable for surveillance of neuroborreliosis, whereas laboratory-based reporting was a feasible alternative. In 2018, the European Commission included Lyme neuroborreliosis on the list of diseases under epidemiological surveillance.

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/content/10.2807/1560-7917.ES.2019.24.20.1800453
2019-05-16
2024-04-19
http://instance.metastore.ingenta.com/content/10.2807/1560-7917.ES.2019.24.20.1800453
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Lyme neuroborreliosis epidemiology in Sweden 2010 to 2014: clinical microbiology laboratories are a better data source than the hospital discharge diagnosis register
<p class="citation"> <span>Citation style for this article:</span> <span class="meta-value authors"> <a href="/search?value1=Viktor+Dahl&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Dahl Viktor</a>, <a href="/search?value1=Karin+T+Wisell&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Wisell Karin T</a>, <a href="/search?value1=Christian+G+Giske&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Giske Christian G</a>, <a href="/search?value1=Anders+Tegnell&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Tegnell Anders</a>, <a href="/search?value1=Anders+Wallensten&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Wallensten Anders</a></span>. Lyme neuroborreliosis epidemiology in Sweden 2010 to 2014: clinical microbiology laboratories are a better data source than the hospital discharge diagnosis register. <a href="/content/ecdc">Euro Surveill.</a> 2019;24(20):pii=1800453. <a href="https://doi.org/10.2807/1560-7917.ES.2019.24.20.1800453" title="doi link" target="_blank">https://doi.org/10.2807/1560-7917.ES.2019.24.20.1800453</a> <span class="ES_Article_citation"> <span class="generated">Received</span>: 20 Aug 2018;&nbsp;&nbsp; <span class="generated">Accepted</span>: 14 Feb 2019 </span> </p>
/content/10.2807/1560-7917.ES.2019.24.20.1800453
/content/10.2807/1560-7917.ES.2019.24.20.1800453
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