Incidence and characterisation of aerobic spore-forming bacteria originating from dairy milk in Tunisia

Abstract : The purpose of this study was to evaluate the incidence and characterisation of aerobic spore-forming bacteria originating from dairy milk in Tunisia. The distribution of Bacillus species in raw milk, pasteurised milk and UHT milk were 47.5%, 27.5% and 25%, respectively. Seven Bacillus species, including Bacillus pumilus (10%), Bacillus subtilis (12.5%), Brevibacillus brevis (10%), Bacillus cereus (22.5%), Bacillus sphaericus (7.5%), Bacillus licheniformis (12.5%) and Bacillus sporothermodurans (25%) were identified in different milk samples. Bacillus cereus was predominant in raw and pasteurised milk. Although B.sporothermodurans was the predominant sporogenous micro-organism in UHT milk, B.cereus, B.sphaericus and B.licheniformis were also present. This study showed that there is a high degree of diversity, both phenotypic and genotypic, among Bacillus isolates from Tunisian milk and the persistence of spoilage risk in UHT milk.
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Contributor : Institut Pasteur Tunis <>
Submitted on : Sunday, October 2, 2016 - 11:19:29 PM
Last modification on : Monday, October 8, 2018 - 5:44:08 PM

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Chedia Aouadhi, Abderrazak Maaroufi, Slah Mejri. Incidence and characterisation of aerobic spore-forming bacteria originating from dairy milk in Tunisia. International Journal of Dairy Technology, Wiley, 2013, 67 (1), pp.95 - 102. ⟨10.1111/1471-0307.12088⟩. ⟨pasteur-01375109⟩

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