Seasonal evaluation of physicochemical parameters in raw milk received by a dairy plant in northern Minas Gerais State, Brazil

The soft cheese Minas frescal is one of the most popular cheese in Brazil, which is typically manufactured in small dairy farms under unsatisfactory hygiene conditions. To assess the risk involved in consumption of this cheese, virulence markers were investigated in 330 Escherichia coli strains isolated from 30 Minas frescal cheeses inspected by official government agency (SIF - serviço de inspeção federal), from 50 cheeses not inspected by SIF and 31 cheeses not inspected by SIF with spice added, all of them collected in the southwest of Minas Gerais State. The E. coli isolates were screened for the presence of Shiga toxin-encoding (stx 1 and stx 2), intimin (eae) genes and for the presence of (pap, sfa, afa) genes related to adhesion in epithelial cells. The only gene detected by PCR was the sfa gene at one isolate. The strains were also screened for resistance to 9 antimicrobial drugs. Predominant resistance was to cephalothin, tetracycline and streptomycin. Multidrug resistance was found among isolates from cheese with SIF (16.6%), cheese without SIF (8.0%) and cheese without SIF with spice added (30.0%) what is a reason for concern due to the high consumption of raw milk cheese by the Brazilian population.

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Influence of climate conditions on aflatoxin M1 contamination in raw milk from Minas Gerais State, Brazil

Food Control ◽

10.1016/j.foodcont.2012.10.024 ◽

2013 ◽

Vol 31 (2) ◽

pp. 419-424 ◽

Cited By ~ 42

Author(s):

Lídia Cristina Almeida Picinin ◽

Mônica Maria Oliveira Pinho Cerqueira ◽

Eugênia Azevedo Vargas ◽

Ângela Maria Quintão Lana ◽

Isabela Maia Toaldo ◽

...

Keyword(s):

Raw Milk ◽

Minas Gerais ◽

Aflatoxin M1 ◽

Climate Conditions ◽

Minas Gerais State

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Effect of seasonal conditions and milk management practices on bulk milk quality in Minas Gerais State - Brazil

Arquivo Brasileiro de Medicina Veterinária e Zootecnia ◽

10.1590/1678-4162-10063 ◽

2019 ◽

Vol 71 (4) ◽

pp. 1355-1363 ◽

Cited By ~ 3

Author(s):

L.C.A. Picinin ◽

M.T. Bordignon-Luiz ◽

M.M.O.P. Cerqueira ◽

I.M. Toaldo ◽

F.N. Souza ◽

...

Keyword(s):

Management Practices ◽

Transition Period ◽

Climatic Factors ◽

Dairy Farms ◽

Raw Milk ◽

Minas Gerais ◽

Laboratory Analysis ◽

Total Bacterial Count ◽

Rainy Period ◽

Minas Gerais State

ABSTRACT The influence of seasonality and the training and implementation of good dairy farming practices on raw milk production and quality was evaluated on dairy farms in Minas Gerais State, Brazil. The physico-chemical composition, somatic cell count (SCC) and total bacterial count (TBC) were determined in 3,096 milk samples collected from bulk tanks originated from 43 dairy farms over a three-year period and correlated with key climatic factors. The recommended milking management practices were applied through a training program and correlated with the seasonal data in three stages: I) prior to training (dry period); II) 48 days after the training (transition period); III) 96 days after the training (rainy period). In the first stage, a diagnosis of the situation was performed with raw milk samplings for laboratory analysis, and training for implementation of good milking practices. In stages II and II, the checklist and laboratory analysis were also performed. The rainfall and high temperatures were found to represent the main factors affecting the milk composition and production, and TBC. The composition and physical properties of raw milk, and the TBC and SCC parameters can be controlled or minimized by applying proper milking management practices and constant monitoring.

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Chilled raw milk quality: a case study in Zona da Mata region, Minas Gerais State, Brazil

Ciência Rural ◽

10.1590/0103-8478cr20190749 ◽

2020 ◽

Vol 50 (4) ◽

Author(s):

Luiz Paulo de Lima ◽

Gustavo Bastos Braga ◽

Ronaldo Perez ◽

Antonio Fernandes de Carvalho

Keyword(s):

Bacterial Count ◽

Raw Milk ◽

Milk Composition ◽

Minas Gerais ◽

Milk Quality ◽

Total Bacterial Count ◽

Improvement Program ◽

Minas Gerais State

ABSTRACT: This paper aimed to analyze the evolution of the quality of raw milk produced by producers in the Zona da Mata region, in the state of Minas Gerais, between 2012 and 2018. For this purpose, we used the linear mixed-effects model to analyze the monthly evolution of the results of milk composition indicators (fat, protein, and defatted dry extract - DDE), somatic cell count - SCC, and total bacterial count - TBC, from the official monthly registry of 94 milk producers, suppliers of a region’s dairy. Results indicate a continuous reduction in the milk composition indicators between 2014 and 2018. For the SCC and TBC indicators, we identified only one-off reductions. The supply of a larger volume of milk was associated with increased TBC. Seasonality influenced all quality indicators analyzed. According to these results, we concluded that the analyzed quality of chilled raw milk offered by producers was proven worse from 2012 to 2018, despite the actions implemented by the National Milk Quality Improvement Program - PNMQL.

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