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Drivers and hazards of consumption of unpasteurised bovine milk and milk products in high-income countries
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de Klerk, Joanna N. and Robinson, Philip A. (2022) Drivers and hazards of consumption of unpasteurised bovine milk and milk products in high-income countries. PeerJ, 10 . e13426. doi:10.7717/peerj.13426 ISSN 2167-8359.
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Official URL: https://doi.org/10.7717/peerj.13426
Abstract
Introduction:
The consumption of dairy products contributes to health, nutrition, and livelihoods globally. However, dairy products do not come without microbiological food safety risks for consumers. Despite this risk, common hygiene measures in high-income countries, particularly pasteurisation, ensures that milk is safe, and is indeed frequently mandated by law. Nevertheless, over the past two decades, there has been a global increase in the number of consumers in high-income developed countries actively seeking out unpasteurised milk in liquid and product forms for perceived nutritional and health benefits, and improved taste. The often-anecdotal claims upon which consumers make such choices are not all supported by scientific evidence; however, some recent research studies have investigated (and in some cases demonstrated) the positive impact of unpasteurised milk consumption on the prevalence of asthma, atopy, rectal cancer and respiratory illness.
Methods:
To investigate the significance of unpasteurised milk and milk product consumption for human health in high-income countries, outbreak data between the years 2000 and 2018 were obtained for the United States of America, Canada, the European Union, the United Kingdom, Japan, New Zealand and Australia, which were then categorized into three World Health Organisation subregions: AMR A, EUR A and WPR A. Outbreak dynamic variables such as pathogens, the place of consumption, numbers of outbreaks and deaths per million capita, the average number of cases per outbreak and regulations were described and analysed using R Studio. To provide an overview of unpasteurised milk-related disease outbreaks, a rapid evidence review was also undertaken to establish an overview of what is known in the current literature about hazards and drivers of consumption.
Results:
Foodborne outbreaks associated with unpasteurised dairy consumption have risen in high-income countries over the period 2000 to 2018, with Campylobacter spp. being the most common aetiological agent responsible, followed by Escherichia coli and Salmonella spp. The most common places of consumption are on farms or in households, indicating individuals choose to drink unpasteurised milk, rather than a widespread distribution of the product, for example, at social events and in schools. Further study is needed to better understand contributing factors, such as cultural differences in the consumption of dairy products.
Conclusion:
There are several observable health benefits linked to consuming raw milk, but outbreaks associated with unpasteurised milk and milk products are on the rise. It cannot be definitively concluded whether the benefits outweigh the risks, and ultimately the decision lies with the individual consumer. Nevertheless, many countries have regulations in place to protect consumer health, acknowledging the definite risks to human health that unpasteurised dairy foods may pose, particularly from microbial hazards.
| Item Type: | Journal Article | ||||||
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| Subjects: | Q Science > QR Microbiology S Agriculture > SF Animal culture |
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| Divisions: | Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) | ||||||
| SWORD Depositor: | Library Publications Router | ||||||
| Library of Congress Subject Headings (LCSH): | Raw milk -- Health aspects , Milk hygiene, Raw milk -- Safety regulations , Bacterial diseases -- Prevention | ||||||
| Journal or Publication Title: | PeerJ | ||||||
| Publisher: | PeerJ, Ltd. | ||||||
| ISSN: | 2167-8359 | ||||||
| Official Date: | 16 May 2022 | ||||||
| Dates: |
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| Volume: | 10 | ||||||
| Article Number: | e13426 | ||||||
| DOI: | 10.7717/peerj.13426 | ||||||
| Status: | Peer Reviewed | ||||||
| Publication Status: | Published | ||||||
| Access rights to Published version: | Open Access (Creative Commons) | ||||||
| Date of first compliant deposit: | 16 June 2022 | ||||||
| Date of first compliant Open Access: | 16 June 2022 | ||||||
| RIOXX Funder/Project Grant: |
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