Avaliação da qualidade de leite cru refrigerado de produtores assistidos pela EMATER/RS no município de São Luiz Gonzaga (RS)
Authors: Marques Thais de Matos , Pires Patrícia Rohr , Leães Fernanda Leal 
Published: November 2020

<p class="normal"><span style="left: 118.11px; top: 901.334px; font-size: 18.6162px; font-family: sans-serif; transform: scaleX(0.722857);">As a relevant source of nutrients, cow’s milk is widely consumed worldwide and its production is an important </span><span style="left: 118.11px; top: 923.167px; font-size: 18.6162px; font-family: sans-serif; transform: scaleX(0.661604);">source of income for small farmers. Considering the need for research on milk quality in the city of São Luiz </span><span style="left: 118.11px; top: 945.001px; font-size: 18.6162px; font-family: sans-serif; transform: scaleX(0.660958);">Gonzaga (RS), the objective of this study was to evaluate the physicochemical and microbiological patterns of </span><span style="left: 118.11px; top: 966.834px; font-size: 18.6162px; font-family: sans-serif; transform: scaleX(0.713614);">milk from producers assisted by EMATER/RS in the city of São Luiz Gonzaga (RS) and to characterize the profile </span><span style="left: 118.11px; top: 988.667px; font-size: 18.6162px; font-family: sans-serif; transform: scaleX(0.705052);">of these producers regarding proper milking practice. The characterization of the producers profile was obtained </span><span style="left: 118.11px; top: 1010.5px; font-size: 18.6162px; font-family: sans-serif; transform: scaleX(0.688184);">after they filled in a form. Quality assays were performed with milk samples from 10 producers. In the form results, </span><span style="left: 118.11px; top: 1032.33px; font-size: 18.6162px; font-family: sans-serif; transform: scaleX(0.652965);">we observed that 70% of producers do not execute the pre-dipping, 60% do not execute post-dipping, 40% do </span><span style="left: 118.11px; top: 1054.17px; font-size: 18.6162px; font-family: sans-serif; transform: scaleX(0.720463);">not perform CMT test to check mastitis in animals and 60% declared that the milking sites are the stables. For </span><span style="left: 118.11px; top: 1076px; font-size: 18.6162px; font-family: sans-serif; transform: scaleX(0.698228);">physicochemical analyzes, the pH averages ranged from 6,51 to 6,81 and titratable acidity varied between 15</span><span style="left: 852.165px; top: 1076px; font-size: 18.6162px; font-family: sans-serif; transform: scaleX(0.718282);"> °D</span><span style="left: 118.11px; top: 1097.83px; font-size: 18.6162px; font-family: sans-serif; transform: scaleX(0.701188);">and 21</span><span style="left: 164.365px; top: 1097.83px; font-size: 18.6162px; font-family: sans-serif; transform: scaleX(0.705777);"> °D. All density results were within the value required by the legislation (1,028 to 1,034). The </span><span style="left: 794.193px; top: 1097.83px; font-size: 18.6162px; font-family: sans-serif; transform: scaleX(0.715839);">averages of </span><span style="left: 118.11px; top: 1119.67px; font-size: 18.6162px; font-family: sans-serif; transform: scaleX(0.710062);">fat determination were between 2,5% and 5,9%, and for EST (total dry extract) results were found ranging from </span><span style="left: 118.11px; top: 1141.5px; font-size: 18.6162px; font-family: sans-serif; transform: scaleX(0.712788);">10,72% to 15,27% and for ESD (dry extract defatted) from 7,92% to 9,37%. In the standard plate count, results </span><span style="left: 118.11px; top: 1163.33px; font-size: 18.6162px; font-family: sans-serif; transform: scaleX(0.672445);">ranged from 1,78</span><span style="left: 243.491px; top: 1163.33px; font-size: 18.6162px; font-family: sans-serif;">x</span><span style="left: 256.887px; top: 1163.33px; font-size: 18.6162px; font-family: sans-serif; transform: scaleX(0.682759);">10</span><span style="left: 273.387px; top: 1163.71px; font-size: 10.8532px; font-family: sans-serif;">4</span><span style="left: 278.197px; top: 1163.33px; font-size: 18.6162px; font-family: sans-serif; transform: scaleX(0.723637);"> CFU/mL</span><span style="left: 340.175px; top: 1163.33px; font-size: 18.6162px; font-family: sans-serif; transform: scaleX(0.61594);"> to 4,8</span><span style="left: 391.106px; top: 1163.33px; font-size: 18.6162px; font-family: sans-serif;">x</span><span style="left: 404.502px; top: 1163.33px; font-size: 18.6162px; font-family: sans-serif; transform: scaleX(0.682759);">10</span><span style="left: 421.001px; top: 1163.71px; font-size: 10.8532px; font-family: sans-serif;">6</span><span style="left: 431.544px; top: 1163.33px; font-size: 18.6162px; font-family: sans-serif; transform: scaleX(0.670358);">CFU/mL. Regarding the presence of total coliforms, there was a </span><span style="left: 118.11px; top: 1185.17px; font-size: 18.6162px; font-family: sans-serif; transform: scaleX(0.693364);">variation between 28</span><span style="left: 258.477px; top: 1185.17px; font-size: 18.6162px; font-family: sans-serif; transform: scaleX(0.780243);"> MPN/mL</span><span style="left: 323.693px; top: 1185.17px; font-size: 18.6162px; font-family: sans-serif; transform: scaleX(0.648122);"> to &gt;1100</span><span style="left: 389.211px; top: 1185.17px; font-size: 18.6162px; font-family: sans-serif; transform: scaleX(0.701589);">MPN/mL and the results of thermotolerant coliforms were &lt;3.0</span><span style="left: 808.617px; top: 1185.17px; font-size: 18.6162px; font-family: sans-serif; transform: scaleX(0.780243);"> MPN/mL</span><span style="left: 118.11px; top: 1207px; font-size: 18.6162px; font-family: sans-serif; transform: scaleX(0.70862);">to &gt;1100 MPN/mL. The results demonstrate the need for corrective actions when obtaining raw milk, seeking to </span><span style="left: 118.11px; top: 1228.83px; font-size: 18.6162px; font-family: sans-serif; transform: scaleX(0.701221);">comply with legal norms and proper milking practice to preserve product quality.</span></p>