ArticleEpidemiology and infection2019
An outbreak of hepatitis A in Canada: The use of a control bank to conduct a case-control study.
Article in Epidemiology and infection, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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Who cites it
8 citing papers in PubMed.
- Hepatitis A outbreak associated with food consumption and sexual practices: a case-control study, Curitiba, Paraná, 2024.Epidemiologia e servicos de saude : revista do Sistema Unico de Saude do Brasil · 2026Article
- Everything but the kitchen sink: The use of multiple hypothesis generation methods to investigate an outbreak ofEpidemiology and infection · 2024Article
- Hepatitis a Vaccine as Opportunity of Primary Prevention for Food Handlers: A Narrative Review.Vaccines · 2023Review
- Recruiting controls from an online panel for a case-control study enabled a timely and reliable foodborneEpidemiology and infection · 2023Article
- Prevalence of Foodborne Viruses in Berries Harvested in Canada.Foods (Basel, Switzerland) · 2023Article
- A 2019 Outbreak Investigation of Hepatitis A Virus Infections in the United States Linked to Imported Fresh Blackberries.Food and environmental virology · 2022Article
- Probable Nipa Palm Wine-Associated Hepatitis A Outbreak after Attending a Funeral Ceremony in Sabah.The American journal of tropical medicine and hygiene · 2021Article
- Review
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Authors and funding
4 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
An outbreak of 18 cases of hepatitis A virus infection across five Canadian provinces was investigated. Case onsets occurred between October 2017 and May 2018. A retrospective matched case-control study was conducted to identify the likely source of the outbreak. Three matched controls were recruited for each case using a previously established control bank, supplemented by landline and cell phone call lists. Univariate and multivariate matched analyses were conducted to identify a potential outbreak source. Seventy-two per cent of controls were recruited through the control bank, and required on average 25.5 calls per recruited control; 20% of controls were recruited through a landline sample and 8% of controls were recruited through a cell phone sample, requiring an average of 847.3 and 331.7 calls per recruited control, respectively. Results of the analysis pointed to shrimp/prawns (odds ratio (OR) 15.75, p = 0.01) and blackberries (OR 7.21, p = 0.02) as foods of interest, however, an outbreak source could not be confirmed. The control bank proved to be a more efficient method for control recruitment than random call lists. Expanding the control bank size and using alternative methods, such as online surveys, may prove beneficial for increasing the timeliness of a case-control study during an outbreak investigation.
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