Clostridium tyrobutyricum occurrence in silages and cattle feed: Use of molecular and simulation data to optimize predictive models

Frontiers in Microbiology

Microbiology

Martina Mosconi¹  Antonio Gallo¹  Daniela Bassi²  Mireya Viviana Belloso Daza²  Alessandra Fontana² 

[1]Dipartimento di Scienze animali, della nutrizione e degli alimenti (DiANA), Università Cattolica del Sacro Cuore, Piacenza, Italy

[2]Dipartimento di Scienze e Tecnologie Alimentari per una Filiera Agro-Alimentare Sostenibile (DISTAS), Università Cattolica del Sacro Cuore, Piacenza, Italy

关键词: Clostridium tyrobutyricum;    late-blowing defect;    predictive modeling;    silage;    real-time PCR;    farm residues;    dairy cows;   

DOI  :  10.3389/fmicb.2023.1118646

 received in 2022-12-07, accepted in 2023-03-09,  发布年份 2023

来源: Frontiers

【 摘 要 】

IntroductionPoor quality silage can derive from the presence of deleterious microorganisms such as clostridia. Their dissemination along the food chain, especially in milk, causes issues such as the cheese late-blowing defect, particularly triggered by Clostridium tyrobutyricum. The scope of our study was to determine the C. tyrobutyricum occurrence in three different farms across four time periods in relation to the animal diets, specifically the Total Mixed Ration (TMR), by using real-time PCR.MethodsFor this purpose, molecular-derived data were exploited to optimize a predictive model that simulated the farm conditions favoring the growth of butyric acid bacteria such as C. tyrobutyricum.ResultsOur results showed that the originally utilized predictive model strongly underestimated the growth of C. tyrobutyricum in comparison to the molecular data. At the same time, our findings uncovered an additional source of contamination in the TMR related to silage and dietary residues that represent a reservoir of microbial contamination during successive TMR preparation. Based on these findings, the optimization of the model parameters such as growth rate range and the inclusion of the residues in the model, allowed a more accurate prediction of the contamination levels. Therefore, this study revealed that proper hygiene practices such as the removal of silage and TMR residues within the farm environment is essential to control the contamination by C. tyrobutyricum and avoid food waste and economic losses.

【 授权许可】

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Copyright © 2023 Mosconi, Fontana, Belloso Daza, Bassi and Gallo.