Evaluación de la calidad de leches crudas en tres subregiones del departamento de Sucre, Colombia

P, Alberto Romero; R, Alfonso Calderón; R, Virginia Rodríguez

doi:10.24188/recia.v10.n1.2018.630

Cited by 9 publications

(8 citation statements)

References 13 publications

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“…This study used test day records up to 2017 while the study of Werner (2014) included lactations records only up to 2011, other studies using Chilean dairy records (Pinedo and Meléndez 2010) are even older. Ponce (2009) and Romero et al (2018) suggested that in order to improve milk quality and continuing lowering SCC, more consistent farmer training and use of information technology is needed and they must reach the dairy sector, mainly small-scale producers. Also, the infrastructure of dairy companies must improve and new ways to industrialize dairy products, that are consumer safe, must be developed.…”

Section: Discussionmentioning

confidence: 99%

Effect of test year, parity number and days in milk on somatic cell count in dairy cows of Los Ríos region in Chile

Sebastino

Uribe

González

2020

Austral j. vet. sci.

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In Chile, most dairy cattle are located in the southern region of the country, where the largest volume of milk is produced. This study aimed to quantify changes of somatic cell count (SCC) over 20 years in 11 herds of the Los Ríos region and to assess the effect of parity number, days in milk, milk yield, and milk fat and protein content on SCC. A database of approximately 277,709 observations based on 10,363 cows from 11 herds of the area was used. Data were gathered from 1998 to 2018. Outliers and inconsistent observations were eliminated. Multiple linear regression was used to model SCC on fixed variables such as test year, parity number, test season, and stage of lactation; covariables included in the model were milk yield, milk fat and protein yields, and milk urea concentration. There were statistically significant associations among SCC and all independent variables included in the model. Regarding parity number and stage of lactation, they increased along with SCC. SCC was higher in warmer months and, as SCC increased, the yield decreased. It was concluded that as test year increased, SCC decreased, indicating that the mammary gland health improved and the quality of the milk was better.

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Section: Discussionmentioning

confidence: 99%

Effect of test year, parity number and days in milk on somatic cell count in dairy cows of Los Ríos region in Chile

Sebastino

Uribe

González

2020

Austral j. vet. sci.

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“…The basic physical–chemical parameters that many dairy plants receiving raw milk evaluate are the amount of water, fat, protein, pH, titratable acidity, presence of chlorides and neutralizers, and determination of total solids and non-fat solids [ 18 ]. However, these analyzes do not determine the presence of cheese whey in milk at the time it arrives at the plant.…”

Section: Resultsmentioning

confidence: 99%

Cheese Whey Milk Adulteration Determination Using Casein Glycomacropeptide as an Indicator by HPLC

Vera-Bravo

Hernández

Peña

et al. 2022

Foods

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Raw milk adulteration with cheese whey is a major problem that affects the dairy industry. The objective of this work was to evaluate the adulteration of raw milk with the cheese whey obtained from the coagulation process, with chymosin enzyme using casein glycomacropeptide (cGMP) as an HPLC marker. Milk proteins were precipitated with 24% TCA; with the supernatant obtained, a calibration curve was established by mixing raw milk and whey in different percentages, which were passed through a KW-802.5 Shodex molecular exclusion column. A reference signal, with a retention time of 10.8 min, was obtained for each of the different percentages of cheese whey; the higher the concentration, the higher the peak. Data analysis was adjusted to a linear regression model, with an R2 of 0.9984 and equation to predict dependent variable (cheese whey percentage in milk) values. The chromatography sample was collected and analyzed by three tests: a cGMP standard HPLC analysis, MALDI-TOF spectrometry, and immunochromatography assay. The results of these three tests confirmed the presence of the cGMP monomer in adulterated samples with whey, which was obtained from chymosin enzymatic coagulation. As a contribution to food safety, the molecular exclusion chromatography technique presented is reliable, easy to implement in a laboratory, and inexpensive, compared with other methodologies, such as electrophoresis, immunochromatography, and HPLC-MS, thus allowing for the routine quality control of milk, an important product in human nutrition.

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“…However, regions such as the Province of Sucre does not have the same standards. Romero et al (2018) reported an average between 530.000 and 624.000 cel/mL. Only the 20.6% of the total raw milk samples tested were <400.000 cel/mL.…”

Section: The Problem Of High Somatic-cell Levels In Colombiamentioning

confidence: 97%

Mastitis, somatic cell count, and its impact on dairy-product quality… An omission in Colombia?: A review

Riveros-Galán

Obando-Chaves

2020

Rev. colomb. cienc. pecu.

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Mastitis is the most common disease in dairy herds and the main cause of economic losses in milk production worldwide. This inflammatory reaction of the mammary gland affects the quantity, composition and quality of milk produced and its suitability for the dairy industry. Despite of its importance, Colombia has no regulations on somatic cell count (SCC); that is, no official upper limits have been established for the dairy industry. The current quality-based payment system for raw milk does not encourage local producers to reduce the level of somatic cells. Consequently, Colombia is at a disadvantage compared to countries that include this parameter in their payment schemes and subscribe to international free trade agreements, affecting the competitiveness of the Colombian dairy sector. This article reviews the types of somatic cells, the microbiology of mastitis, its etiology and diagnosis, the changes that generate the composition of milk, and the impact of high SCCs on the quality of dairy products, such as yogurt, cheese, and milk powder. The final section offers a reflection on the problem of high SCCs in Colombia and the lack of regulations in this regard.

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Evaluación de la calidad de leches crudas en tres subregiones del departamento de Sucre, Colombia

Cited by 9 publications

References 13 publications

Effect of test year, parity number and days in milk on somatic cell count in dairy cows of Los Ríos region in Chile

Effect of test year, parity number and days in milk on somatic cell count in dairy cows of Los Ríos region in Chile

Cheese Whey Milk Adulteration Determination Using Casein Glycomacropeptide as an Indicator by HPLC

Mastitis, somatic cell count, and its impact on dairy-product quality… An omission in Colombia?: A review

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