ArticleCanada communicable disease report = Releve des maladies transmissibles au Canada2019
Use of a case-control study and control bank to investigate an outbreak of locally acquired cyclosporiasis in Canada, 2016.
Article in Canada communicable disease report = Releve des maladies transmissibles au Canada, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
7 citing papers in PubMed.
- Multi-Laboratory Evaluation of Modified BAM Chapter 19b and Long-Term Detection ofMicroorganisms · 2026Article
- Ten years of Foodbook: Utilization of Foodbook survey data for research.Canada communicable disease report = Releve des maladies transmissibles au Canada · 2025Article
- Detectability and Persistence ofPathogens (Basel, Switzerland) · 2025Article
- Evaluation of the Increased Genetic Resolution and Utility for Source Tracking of a Recently Developed Method for GenotypingMicroorganisms · 2024Article
- Article
- Genotyping CanadianMicroorganisms · 2022Article
- An outbreak of hepatitis A in Canada: The use of a control bank to conduct a case-control study.Epidemiology and infection · 2019Article
Corrections and comments
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Authors and funding
7 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
background
objectiveTo report on a national outbreak of locally acquired cyclosporiasis, highlight the challenges of investigating these outbreaks and document the first time use of a control bank to recruit controls for a national outbreak case-control study in Canada.
methodsCases of cyclosporiasis were identified through provincial laboratory testing and reported through provinces to the national level. Cases were interviewed about food exposures using a questionnaire and food exposures reported by cases were compared to Foodbook reference values. To narrow down the food items of interest, a matched case-control study was conducted. Controls for the study were recruited primarily from a control bank, that is, a list of individuals who had previously agreed to participate in public health-related surveys.
resultsIn total, 87 cases of locally acquired cyclosporiasis with onset or report dates between May 19, 2016 and August 10, 2016 were reported by four provinces. Comparing case exposures to Foodbook reference values identified several food items of interest, including blackberries, other berries, herbs and leafy greens. The case-control study identified only blackberries and mesclun greens as significantly more frequently consumed by cases than controls. Due to lack of product details for blackberries and mesclun greens, the source of the outbreak was not conclusively identified.
conclusionBlackberries were the primary food item of interest, but could not be identified as the conclusive source due to lack of traceability. The control bank was found to be a useful tool for control recruitment.
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