test Examination of covariance and correlation in aflatoxin levels between feeds and dairy cattle milk in Northern Greece|Περιοδικό της Ελληνικής Κτηνιατρικής Εταιρείας

Examination of covariance and correlation in aflatoxin levels between feeds and dairy cattle milk in Northern Greece

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Δημοσιευμένα: Νοε 7, 2025
DOI: https://doi.org/10.12681/jhvms.39644
D Gourdouvelis
Department of Animal Production, Faculty of Agriculture, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
V Dotas
Department of Animal Production, Faculty of Agriculture, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
D Vouzaras
Department of Animal Sciences, University of Thessaly, GR-41500 Larisa, Greece
I Kaimakamis
Department of Animal Production, Faculty of Agriculture, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
L Hatzizisis
Faculty of Agriculture, University of Ioannina, 47100 Arta, Greece
M Koidou
Department of Agriculture, School of Agricultural Sciences, University of Western Macedonia, 53100 Florina, Greece
V Schina
Department of Animal Production, Faculty of Agriculture, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
Περίληψη

This study aimed to determine the concentration of aflatoxins and reveal the degree of correlation between feed and cow’s milk. A total of 182 corn grain samples, 73 cotton pie samples, 183 maize silage samples, 183 total mixed ration samples, and 183 fresh cow milk samples were collected and analyzed using the ELISA method in 2021 and 2022 from farms in the Central Macedonia and Thessaly regions.  The Pearson coefficient was employed to investigate the existence of correlations. The results indicated that the presence of aflatoxins in milk is significantly correlated with the level of aflatoxins in feed. The levels of aflatoxin concentrations in corn grain, cotton pie, and total mixed rations showed a presence of aflatoxins in cow’s milk. Specifically, when the concentration of aflatoxins in either the corn grain or the total daily ration increases, the concentration of aflatoxins in the milk also rises, never exceeding the maximum permissible limit. The analysis is completed by capturing and examining scatter charts among the variables, which found strong correlations. In all cases, there is no evidence of non-linear relationships or strongly divergent values, and the dispersion of the points is small, indicating high correlation values (r>0.700). Moreover, this study indicates that the feed used in dairy cattle must have zero or low levels of aflatoxins to produce aflatoxin-free milk. Careful observance of the rules and conditions in the production, harvesting, drying, storage and maintenance of feed materials is of key importance in this regard.

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