Abstract

TARAZONA-MANRIQUE, L. E; ANDRADE-BECERRA, R. J.  and  VARGAS-ABELLA, J. C.. Detection of aflatoxin M₁ in raw cow milk samples in cooling tanks in Boyacá (Colombia). Rev. Med. Vet. Zoot. [online]. 2020, vol.67, n.3, pp.219-229.  Epub May 05, 2021. ISSN 0120-2952.  https://doi.org/10.15446/rfmvz.v67n3.93929.

One of the main forms of contamination of milk with mycotoxins is the consumption of fermented foods that are contaminated with mold, mainly Aspergillus spp, which produce toxins that can become a public health problem due to their thermal and chemical stability. The objective of the present work was to detect aflatoxin M1 concentrations in cows' milk samples in cooling tanks in four municipalities of the department of Boyacá for one year, determining the variations according to the season. A longitudinal, quantitative descriptive study was carried out, four cooling tanks from four different municipalities in the department were randomly selected, each tank, in each municipality, was sampled twice a month throughout the study period and processed using Charm methodology Ez Lite®, an ANDEVA was performed to determine the statistical differences between aflatoxin M1 concentrations for each quarter. Statistical differences were determined between each of the quarters of the study, finding a positivity percentage of 74.06% of the total positive samples in the summer quarters. 28.12% (108) of the samples taken throughout the study were positive, with toxin concentrations ranging between 0.5 and 2.0 μg/Kg of milk. Seasonal concentrations and variations of aflatoxin M1 in milk cooling tank samples were determined for the first time in the department of Boyacá, finding the highest concentrations and number of positive cases of aflatoxin M1 in the summer months.

Keywords : charm; milk; aflatoxin M₁ public health.

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