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Flow of spore-forming bacteria between suppliers of dairy powders and users in some developing countries: challenges and perspectives

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Abstract

Spore-forming bacteria are common contaminants of milk powder and processing lines and a major concern for the dairy industry. This dairy-associated microflora was studied extensively and well characterized in developed countries (exporters of milk powder), compared to developing countries (importers). Thereby, the quality issues affecting dairy powders and derived products are not fully controlled in developing countries. That is the case in Algeria, where recombined or reconstituted pasteurized milk is of low quality, reduced shelf-life, and the related dairies faced recurrent contaminations due to spores and biofilms. The transfer of spore-forming bacteria from exporters of dairy powders to importers in developing countries is an interesting topic, not thoroughly investigated. In addition, milk powder-based products are growing worldwide and their attributes, processes and technologies need to be better understood and controlled. This review analyzes issues affecting milk powder quality, based on few studies from developing countries in comparison with current knowledge, and emphasis on the case in Algeria. It provides information on how spore-forming bacteria and their biofilms affect the quality and shelf-life of recombined pasteurized milk produced in Algeria and compromise hygiene conditions in local dairy plants. Challenges and perspectives for better management of spore transfer from exporters of dairy powders to importers in developing countries are thereby outlined.

Highlights

  • The presence of spore-forming bacteria in milk powder is a serious safety issue.

  • Spores are not well known, characterized and controlled in importers from developing countries.

  • Spores cause recurrent contamination of pasteurized milk and biofilm issues in Algerian dairies.

  • Challenges are how to reduce the flow of spores in milk powder trade.

  • Perspectives on identification targeting predominant spores and improvement of biofilm removal.

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Fig. 1
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Adapted from Malek (2016a)

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Adapted from Malek (2016a)

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Adapted from Malek (2016a)

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Acknowledgements

Trade data exposed in this paper are available from required report of public distribution of USDA: United State Department of Agriculture (Foreign Agricultural service) and GAIN: Global Agricultural Information Network and from JORA: Journal officiel de la République Algérienne. The related government authorities are acknowledged for these information supports.

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  1. Department of Biology, Faculty SNV-STU, University of Tlemcen, 13000, Tlemcen, Algeria

    Fadila Malek

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Malek, F. Flow of spore-forming bacteria between suppliers of dairy powders and users in some developing countries: challenges and perspectives. J Food Sci Technol 60, 2132–2142 (2023). https://doi.org/10.1007/s13197-022-05495-0

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