Tag Archives: somatic cell count

xxx S. Skuja, V. Antāne and I. Lūsis
Effects of retained fetal membranes treatments and dry period length on the subsequent lactation in cows – milk yield and somatic cell count
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Effects of retained fetal membranes treatments and dry period length on the subsequent lactation in cows – milk yield and somatic cell count

S. Skuja*, V. Antāne and I. Lūsis

Latvia University of Life Sciences and Technologies, Faculty of Veterinary Medicine, Kr. Helmaņa 8, LV3004 Jelgava, Latvia *Correspondence: santa.skuja0@gmail.com

Abstract:

Different treatment strategies in cows with retained fetal membranes (RFM) may affect subsequent lactation in various ways. Also, excessively short or long dry periods (DP) can decrease milk yield (MY), increase the risk of poor udder health, and increase the risk of RFM. This study aimed to evaluate how different treatment strategies of RFM affect subsequent lactation in cows, i.e., MY and udder health determined on the somatic cell count (SCC) bases in milk, expressed as somatic cell score (SCS). A secondary but equally important objective was to analyse the dry period length (DPL) effect on the subsequent lactation in cows. The cows from two herds were divided into three groups: group 1–healthy control; group 2–cows with RFM, removed manually and treated with intrauterine (IU) antibiotics (AB); group 3–cows with RFM, not removed, but treated IU with AB. The DP of cows was divided post factum into shortened (up to 46 days), traditional (47 to 70 days), or prolonged (over 70 days). Statistical analyses were performed using linear multiple regression and multivariate analyses. Differences were statistically significant when P <0.05. The effect of different RFM treatment strategies on MY and SCS was evaluated. There were no statistically significant effects of RFM treatments on the MY in the subsequent lactation. However, there was a tendency (P = 0.07) for SCS in standard lactation to be higher in cows in group 2. The highest economic losses, calculated from the decrease in MY, were detected in the same group. Significantly lower MY was observed in cows with a shortened DPL during the first 30 days PP (P <0.05). The DPL did not affect the SCS.

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1796–1703 L. Marcinkoniene and I. Ciprovica
The influence of milk quality and composition on goat milk suitability for cheese production
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The influence of milk quality and composition on goat milk suitability for cheese production

L. Marcinkoniene* and I. Ciprovica

Latvia University of Life Sciences and Technologies, Faculty of Food Technology, Department of Food Technology, Riga Street 22, LV-3004, Jelgava, Latvia
*Correspondence: liga.marcinkoniene@gmail.com

Abstract:

The goat milk production sector is growing in Latvia, therefore detailed studies are required to examine goat milk suitability for cheese production. There is still not enough information about the chemical composition and quality of goat milk, and its connection with milk renneting properties. The objective of this study was to analyse the impact of milk composition and quality on goat milk renneting properties. Fat, protein, lactose, urea content, somatic cell count and freezing point were measured by infrared spectroscopy. The curd firmness was analysed by Texture Analyser TA.HD.plus (Stable Micro Systems, UK). In total, 34 samples, including bulk milk samples (n = 3) were analysed. The analysed breeds included the Latvian Native (n = 9), Saanen (n = 14) and milking crosses (closer to Anglo Nubian) (n = 8). The samples were arranged according to the lactation, somatic cell count and breeds. Obtained fat content varied from 1.72 to 4.67%, and the protein content – from 2.93 to 4.57% in individual goat milk samples. The highest fat to protein ratio was established in the Saanen breed goat milk (0.96), but the lowest – in milking crosses’ milk (0.80). The highest somatic cell count was determined in the second lactation goat milk (1421 thous mL-1) and in milking crosses’ goat milk (1027 thous mL-1). The somatic cell count influences curd firmness in cheese, and the highest fat to protein ratio was established in the first group samples with lower somatic cell count.

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144–154 G. Gulbe, S. Doniņa, V. Saulīte, J. Jermolajevs, L. Peškova, Š. Svirskis and A. Valdovska
The effect of immunomodulation composition on systemic immune response and udder health in case of bovine subclinical mastitis
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The effect of immunomodulation composition on systemic immune response and udder health in case of bovine subclinical mastitis

G. Gulbe¹*, S. Doniņa¹, V. Saulīte¹, J. Jermolajevs¹, L. Peškova¹, Š. Svirskis¹ and A. Valdovska¹²

¹Riga Stradins University, A. Kirchenstein Institute of Microbiology and Virology, Ratsupites street 5, Riga, LV-1067, Latvia
²Latvia University of Agriculture, Faculty of Veterinary medicine, Institute of Food and Environmental Hygiene, Kr. Helmana street 8, Riga, LV-3004, Latvia
*Correspondence: Gundega.Gulbe85@gmail.com

Abstract:

Modulation of mammary gland immune response may offer an alternative to antimicrobial therapy in the treatment of subclinical mastitis. The aim of the study is to investigate the systemic immunomodulating effect and the impact of composition LLG which consists of lysozyme, lactic acid and glycopeptides isolated from Lactobacillus spp. on udder health parameters. A total of 10 cows with subclinical mastitis were used in the study – 5 cows (19 udder quarters) in the experimental group and 5 other cows (19 udder quarters) in the control group. The experimental cows received intramammary infusions of LLG, given once per day, 3 times with the intervals of 48 h. Cows from the control group received infusions of sterile 0.15 M NaCl, given in the same way as the treated cows. The following parameters were measured: somatic cell count (SCC), the total number of blood leucocyte, differentiation between banded neutrophils, segmented neutrophils and lymphocytes, peripheral blood mononuclear cells and markers of cell activation. Besides bacteriological culturing was performed. Quarter milk and blood samples were taken several times from the 1st to the 21st day. During the treatment the number of lymphocytes and T helper cells significantly decreased in the blood of the treated group, the CD8+ cells did not change remarkably, the number of CD25+, CD38+, as well as CD69+ and CD95+ cells had diminished during the treatment. On the 21st day a rapid increase of IL-2 receptor bearing cells was detected. A significant elevation of SCC in the treated group was observed but pathogenic bacteria incidence decreased.

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1396–1406 T. Michlová, H. Dragounová, R. Seydlová and A. Hejtmánková
The hygienic and nutritional quality of milk from Saanen goats bred in the Moravian-Silesian region
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The hygienic and nutritional quality of milk from Saanen goats bred in the Moravian-Silesian region

T. Michlová¹*, H. Dragounová², R. Seydlová² and A. Hejtmánková¹

¹Czech University of Life Sciences Prague, Faculty of Agrobiology, Food and Natural Resources, Department of Chemistry, Kamýcká 129, CZ165 21, Prague, Czech Republic
²Dairy Research Institute Ltd, Ke dvoru 791/12A, CZ160 00, Prague, Czech Republic
*Correspondence: michlova@af.czu.cz

Abstract:

 The aim of the study was to monitor milk yield and the hygienic and nutritional quality of milk of Saanen goats in the Moravian-Silesian region in Czech Republic. Milk samples were collected once a month during the lactation period. The average milk yield in the standardized lactation was 1,100 liters. The somatic cell count in pool samples ranged from 470 x 103 to 696 x 103. The total microorganism count ranged from 3.6 x 103 to 1.4 x 105. The pathogen Staphylococcus aureus was proven no more than in 6.3%. The highest values of all main components of milk were achieved within a relatively short time after kidding (April 2015). The average content of fat was 3.64  0.52 g 100 ml-1, 3.17  0.16 g 100 ml-1 of protein, 2.60  0.06 g 100 ml-1 of casein, 4.56  0.24 g 100 ml-1 of lactose, and 12.02  0.80 g 100 ml-1 of solids. Average content of vitamin A was 0.27  0.14 mg kg-1 and average content of vitamin E was 0.60  0.34 mg kg-1. Content of vitamin E increased almost continuously during the lactation, and the content of vitamin A was significantly higher at the end of lactation. In lyophilized milk powder the average trace metal contents were 7.76  0.92 g kg-1 Ca, 1.62  0.26 g kg-1 Mg, 15.3  1.43 g kg-1 K, 789  111 mg kg-1 Na, 23.2  2.73 mg kg-1 Zn, and 0.85  0.55 mg kg-1 Cu. Contents of minerals varied during the lactation period, but no significant trends were observed.

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