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Traditional milk transformation schemes in Côte d'Ivoire and their impact on the prevalence of Streptococcus bovis complex bacteria in dairy products.

  • Sanhoun AR UFR des Sciences et Technologies des Aliments (STA), Université Nangui Abrogoua, Abidjan, Côte d'Ivoire.
  • Traoré SG Centre Suisse de Recherches Scientifiques en Côte d'Ivoire (CSRS), Abidjan, Côte d'Ivoire.
  • Gboko KDT Centre Suisse de Recherches Scientifiques en Côte d'Ivoire (CSRS), Abidjan, Côte d'Ivoire.
  • Kirioua J Département Biochimie-Génétique, Université Péléforo Gon Coulibaly, Korhogo, Côte d'Ivoire.
  • Kurt F Department of Health Sciences and Technology, ETH Zürich, Zürich, Switzerland.
  • Otaru N Department of Health Sciences and Technology, ETH Zürich, Zürich, Switzerland.
  • Iten P Department of Health Sciences and Technology, ETH Zürich, Zürich, Switzerland.
  • Kaindi DWM Department of Food Science, Nutrition and Technology, University of Nairobi, Nairobi, Kenya.
  • Kreikemeyer B Institute of Medical Microbiology, Virology, and Hygiene, Rostock University Medical Centre Rostock, Rostock, Germany.
  • Renault P Institute Nationale de la Recherche Agronomique, UMR 1319 MICALIS, Jouy-en-Josas, France.
  • Dao D Centre Suisse de Recherches Scientifiques en Côte d'Ivoire (CSRS), Abidjan, Côte d'Ivoire.
  • Hattendorf J Department of Epidemiology and Public Health, Swiss Tropical and Public Health Institute, Basel, Switzerland.
  • Meile L Department of Health Sciences and Technology, ETH Zürich, Zürich, Switzerland.
  • Koussemon M UFR des Sciences et Technologies des Aliments (STA), Université Nangui Abrogoua, Abidjan, Côte d'Ivoire.
  • Jans C Department of Health Sciences and Technology, ETH Zürich, Zürich, Switzerland.
  • Bonfoh B Centre Suisse de Recherches Scientifiques en Côte d'Ivoire (CSRS), Abidjan, Côte d'Ivoire.
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  • 2020-05-16
Published in:
  • PloS one. - 2020
Animals
Cattle
Cote d'Ivoire
Cross-Sectional Studies
Cultured Milk Products
Female
Food Microbiology
Humans
Milk
Phylogeny
Streptococcus
Streptococcus bovis
Streptococcus gallolyticus
English The Streptococcus bovis/Streptococcus equinus complex (SBSEC) and possibly Streptococcus infantarius subsp. infantarius (Sii) are associated with human and animal diseases. Sii predominate in spontaneously fermented milk products with unknown public health effects. Sii/SBSEC prevalence data from West Africa in correlation with milk transformation practices are limited. Northern Côte d'Ivoire served as study area due to its importance in milk production and consumption and to link a wider Sudano-Sahelian pastoral zone of cross-border trade. We aimed to describe the cow milk value chain and determine Sii/SBSEC prevalence with a cross-sectional study. Dairy production practices were described as non-compliant with basic hygiene standards. The system is influenced by secular sociocultural practices and environmental conditions affecting product properties. Phenotypic and molecular analyses identified SBSEC in 27/43 (62.8%) fermented and 26/67 (38.8%) unfermented milk samples. Stratified by collection stage, fermented milk at producer and vendor levels featured highest SBSEC prevalence of 71.4% and 63.6%, respectively. Sii with 62.8% and 38.8% as well as Streptococcus gallolyticus subsp. macedonicus with 7.0% and 7.5% were the predominant SBSEC species identified among fermented and unfermented milk samples, respectively. The population structure of Sii/SBSEC isolates seems to reflect evolving novel dairy-adapted, non-adapted and potentially pathogenic lineages. Northern Côte d'Ivoire was confirmed as area with high Sii presence in dairy products. The observed production practices and the high diversity of Sii/SBSEC supports in-depth investigations on Sii ecology niche, product safety and related technology in the dairy value chain potentially affecting large population groups across sub-Saharan Africa.
Language
  • English
Open access status
gold
Identifiers
Persistent URL
https://sonar.ch/global/documents/185542
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