RT Book, Section T1 In Vitro and In-Model Evaluation of the Antimicrobial Activity of Lactic Acid Bacteria Protective Cultures to Replace Nitrite in Dry Fermented Sausages A1 Hierro Paredes, Eva A1 Fernández Hospital, Xavier A1 Mano, Sergio A1 Fernández Álvarez, Manuela AB When investigating substitutes for nitrate and nitrite in meat products, it is essential to assess whether these alternatives have the same antimicrobial effect as the curing salts to be fully or partially replaced. Challenge tests on real products require a considerable amount of time and expense, and it is necessary to have precise information on the activity and viability of the compounds/ingredients to be investigated to carry out those tests. Here, we describe the protocol for conducting in vitro (using agar diffusion test) and meat model studies with bacteriocin-producing lactic acid bacteria cultures to replace nitrite in fermented sausages before proceeding to in-product challenge tests. We describe the protocol to investigate antilisterial activity, but it can be applied to other non-spore-forming meat pathogens. With some modifications, this protocol could also be adapted to test antimicrobial ingredients other than bacteriocin-producing cultures. PB Springer SN 978-1-0716-3573-5 SN 2662-950X YR 2023 FD 2023 LK https://hdl.handle.net/20.500.14352/93972 UL https://hdl.handle.net/20.500.14352/93972 LA eng NO Hierro, E., Hospital, X.F., Mano, S.B., Fernández, M. (2024). In Vitro and In-Model Evaluation of the Antimicrobial Activity of Lactic Acid Bacteria Protective Cultures to Replace Nitrite in Dry Fermented Sausages. In: Verruck, S., Teixeira Marsico, E. (eds) Functional Meat Products. Methods and Protocols in Food Science . Humana, New York, NY. https://doi.org/10.1007/978-1-0716-3573-5_10 DS Docta Complutense RD 10 abr 2025