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Metataxonomic analysis of microbiota from Pakistani dromedary camelids milk and characterization of a newly isolated Lactobacillus fermentum strain with probiotic and bio-yogurt starter traits

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Abstract

This study was undertaken to investigate the starter and probiotic potential of lactic acid bacteria isolated from dromedarian camel’s milk using both culture-dependent and -independent approaches and metataxonomic analysis. Strains of lactic acid bacteria recovered were examined in vitro for tolerance to gastric acidity, bile, and lysozyme. Bile salt hydrolysis, serum cholesterol-lowering, oxalate degradation, proteolytic activity, exopolysaccharide production, and cell surface characteristics necessary for colonizing intestinal mucosa were also evaluated. A single strain of the species, Lactobacillus fermentum named NPL280, was selected through multivariate analysis as it harbored potential probiotic advantages and fulfilled safety criteria. The strain assimilated cholesterol, degraded oxalate, produced exopolysaccharides, and proved to be a proficient alternate yogurt starter with good viability in stored bio-yogurt. A sensorial analysis of the prepared bio-yogurt was also found to be exemplary. We conclude that the indigenous L. fermentum strain NPL280 has the desired traits of a starter and adjunct probiotic culture for dairy products.

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All data generated or analyzed during this study are included in this published article (and its supplementary information files).

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Funding

This work was partially supported by an HEC, Pakistan’s TDF grant no.040 awarded to the corresponding author along with a Government of Pakistan’s PSDP grant, “Development of a National Probiotic Lab at NIBGE.” The corresponding author was its Project Director.

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Authors

Contributions

Kanwal Aziz: investigation, formal analysis, writing the original draft. Zubair Farooq: investigation, resources. Arsalan Zaidi: conceptualization, methodology, resources, writing-review and editing, visualization, supervision, project administration, funding acquisition. Muhammad Tariq: validation, resources. Contributions of Kanwal Aziz and Arsalan Zaidi are equal.

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Correspondence to Arsalan Haseeb Zaidi.

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All procedures performed in studies involving human participants were per the institutional and national research committee’s ethical standards and the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. The study was approved by the Institutional review committee (NIBGE). Informed consent was obtained from all individual participants included in the study.

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The authors declare that they have no conflict of interest.

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Aziz, K., Farooq, Z., Tariq, M. et al. Metataxonomic analysis of microbiota from Pakistani dromedary camelids milk and characterization of a newly isolated Lactobacillus fermentum strain with probiotic and bio-yogurt starter traits. Folia Microbiol 66, 411–428 (2021). https://doi.org/10.1007/s12223-021-00855-3

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  • DOI: https://doi.org/10.1007/s12223-021-00855-3

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