Food Hygiene
Mohammadreza Taghdiri; Guiti Karim; Shahabeddin Safi; Abbas Rahimi Foroushani; Abbasali Motalebi
Volume 9, Issue 2 , June 2018, , Pages 179-185
Abstract
Bulk tank somatic cell count (BTSCC) is a gold standard test for identification of milk quality, but its results are influenced by several interventional factors. Recently, application of acute phase proteins and especially milk amyloid A (MMA) has been considered as accurate parameters for milk quality ...
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Bulk tank somatic cell count (BTSCC) is a gold standard test for identification of milk quality, but its results are influenced by several interventional factors. Recently, application of acute phase proteins and especially milk amyloid A (MMA) has been considered as accurate parameters for milk quality study. The current research was done to evaluate the accuracy of MMA, BTSCC, fat, protein and lactose for identification of milk quality. Ninety bulk tank milk samples were collected from 30 randomly selected dairy herds and classified into two groups of samples with BTSSC > 200000 cells per mL and those with BTSSC < 200000 cells per mL. Protein, fat, lactose and MAA contents of samples were analyzed. Average amount of the MAA in healthy and mastitic milk samples were 5.15 and 504.35 ng mL-1, respectively. Statistically significant difference was seen for MAA and total protein contents between two groups. Clinical accuracy of MAA-, total protein-, fat- and lactose–based methods was 0.937, 0.757, 0.665 and 0.547, respectively. The MAA method at concentration of 20.78 ng mL-1 had the highest sensitivity (97.30%) and specificity (46.70%). Evaluation of MAA is recommended as a rapid and accurate method for determination of the unfavorable changes in milk quality and early subclinical mastitis diagnosis.
Ladan Mansouri-Najand; Zeinab Rezaii
Volume 6, Issue 1 , March 2015, , Pages 79-82
Abstract
Milk is often described as a complete food because it contains protein, sugar, fat, vitamins, and minerals. This study was performed to investigate risk factors affecting chemical and bacteriological quality of bulk tank milk. According to the following conducted experiments, the milk was divided into ...
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Milk is often described as a complete food because it contains protein, sugar, fat, vitamins, and minerals. This study was performed to investigate risk factors affecting chemical and bacteriological quality of bulk tank milk. According to the following conducted experiments, the milk was divided into two standard and non-standard groups. Then, effect of risk factors on making the samples non-standard was studied. Risk factors such as type of milk delivery unit, distance of cattle farm from plant, size of herd, education level of stockbreeders, capacity of milk transport tank, capacity of cooler device, and number of workers employed in cattle farms were evaluated in this study. Microbial and chemical evaluations were performed. Beta-lactam antibiotic residues and somatic cell count were specified. At the same time, the stockbreeders who referred to the plant were given some questionnaires and the mentioned primary questions were asked. After collecting the data, logistic regression model was used. According to the obtained results and comparison with Iran’s national standard, 26 out of 109 samples were determined to be at standard level and 83 ones had at least one out-of-standard factor. The results obtained from the model demonstrated significant effect of education of stockbreeders and capacity of cooler devices on the milk quality. Education of stockbreeders could greatly affect management of a cattle farm unit.
