Traditional milk transformation schemes in Côte d’Ivoire and their impact on the prevalence of Streptococcus bovis complex bacteria in dairy products - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement
Journal Articles PLoS ONE Year : 2020

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

Aimé R Sanhoun
  • Function : Author
Sylvain G Traoré
  • Function : Author
Kossia D T Gboko
  • Function : Author
Jérôme Kirioua
  • Function : Author
Fabienne Kurt
  • Function : Author
Nize Otaru
  • Function : Author
Patriz Iten
  • Function : Author
Dasel W M Kaindi
  • Function : Author
Bernd Kreikemeyer
  • Function : Author
Daouda Dao
  • Function : Author
Jan Hattendorf
  • Function : Author
Leo Meile
  • Function : Author
Marina Koussemon
  • Function : Author
Christoph Jans
Bassirou Bonfoh
  • Function : Author

Abstract

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 Co ˆte 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 Co ˆte 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
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Dates and versions

hal-04309376 , version 1 (27-11-2023)

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Aimé R Sanhoun, Sylvain G Traoré, Kossia D T Gboko, Jérôme Kirioua, Fabienne Kurt, et al.. Traditional milk transformation schemes in Côte d’Ivoire and their impact on the prevalence of Streptococcus bovis complex bacteria in dairy products. PLoS ONE, 2020, 15 (5), pp.e0233132. ⟨10.1371/journal.pone.0233132⟩. ⟨hal-04309376⟩
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