Volume 77, Issue 3 pp. 804-812
Research Article

Selection of robust starters from household dahi and assessment of their sensitivity to bacteriophage isolated from dairy effluents

Archana Chandran

Corresponding Author

Archana Chandran

Kerala Veterinary and Animal Sciences University, Pookode, Lakkidi (PO), 673576 Wayanad, Kerala, India

Author for correspondence. E-mail: [email protected]

Contribution: Conceptualization, Formal analysis, ​Investigation, Methodology, Writing - original draft, Writing - review & editing

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Murugadas Vaiyapuri

Murugadas Vaiyapuri

Central Institute of Fisheries Technology, C.I.F.T Junction, Matsyapuri, Willingdon Island, 682029 Kochi, Kerala, India

Contribution: Conceptualization, Formal analysis, Resources, Supervision, Writing - review & editing

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Ramachandran Latha Rathish

Ramachandran Latha Rathish

Kerala Veterinary and Animal Sciences University, Pookode, Lakkidi (PO), 673576 Wayanad, Kerala, India

Contribution: Methodology, Visualization, Writing - review & editing

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Lijo John

Lijo John

Kerala Veterinary and Animal Sciences University, Pookode, Lakkidi (PO), 673576 Wayanad, Kerala, India

Contribution: Formal analysis, Resources

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Jennifer Mahony

Jennifer Mahony

School of Microbiolgy and APC Microbiome Ireland, University College Cork, Western Road, T12 YT20 Cork, Ireland

Contribution: Resources, Supervision, Validation, Writing - review & editing

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Beena Athrayil Kalathil

Beena Athrayil Kalathil

Kerala Veterinary and Animal Sciences University, Pookode, Lakkidi (PO), 673576 Wayanad, Kerala, India

Contribution: Project administration, Supervision

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First published: 27 March 2024

Abstract

Identifying the predominant strains of lactic acid bacteria (LAB) in dahi that are resistant to bacteriophages is essential for developing robust starter cultures. Dahi samples from two agroecological zones of Kerala were collected for isolation of LAB. Limosilactobacillus fermentum emerged as the dominant starter culture species based on sequence-based identification and technological property characterisation. Dairy effluents were screened for phages targeting L. fermentum, and 10 of 11 strains of L. fermentum showed resistance to one lytic phage isolated as part of this study. The strain ADMT 15 showed sensitivity to the phage and on subsequent genome sequencing the phage revealed its close relationship to members of the Herelleviridae phage family.

CONFLICT OF INTEREST STATEMENT

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

DATA AVAILABILITY STATEMENT

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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