Blood Serum Of Dairy Cows Research Articles

Total protein, albumin, and globulin levels of blood serum in repeat breeder Holstein Friesian cows

This study aimed to determine the relationship between total protein, albumin, and globulin in the blood with the incidence of repeat breeders in dairy cows. Ten normal cyclic cows and ten repeat breeders cows were taken randomly based on the reproductive records of the Tani Wilis Village Cooperative, Sendang District, Tulungagung Regency. Questionnaire data in the form of farmers' knowledge about dairy cows' reproductive systems and feed treatment is displayed descriptively. Dairy cows blood samples were taken from the jugular vein 6 mL to measure total protein, albumin, and globulin levels. Data analyzed using the Statistical Product and Service Solution software at a significance level of 5%. The results showed that the total protein, albumin, and globulin levels in normal dairy cows and dairy cows with repeat breeders were not significantly different (p>0.05). However, in normal cyclic cows, most of the total protein, albumin, and globulin levels (80-100% of normal cyclic cows samples) are within the normal range. Meanwhile, the majority of repeat breeder cows (60-70% of the repeat breeder cows) had total protein, albumin, and globulin levels lower than the normal range (p<0.05). It could be concluded that there was a relationship between the incidence of repeat breeder and total protein, albumin, and globulin levels in the blood serum of dairy cows with repeat breeder. Therefore, it is suggested to raise awareness of smallholder farmers about proper feeding and feeding management to reduce repeat breeder cases.

Total protein, albumin, and globulin levels of blood serum in repeat breeder Holstein Friesian cows

This study aimed to determine the relationship between total protein, albumin, and globulin in the blood with the incidence of repeat breeders in dairy cows. Ten normal cyclic cows and ten repeat breeders cows were taken randomly based on the reproductive records of the Tani Wilis Village Cooperative, Sendang District, Tulungagung Regency. Questionnaire data in the form of farmers' knowledge about dairy cows' reproductive systems and feed treatment is displayed descriptively. Dairy cows blood samples were taken from the jugular vein 6 mL to measure total protein, albumin, and globulin levels. Data analyzed using the Statistical Product and Service Solution software at a significance level of 5%. The results showed that the total protein, albumin, and globulin levels in normal dairy cows and dairy cows with repeat breeders were not significantly different (p>0.05). However, in normal cyclic cows, most of the total protein, albumin, and globulin levels (80-100% of normal cyclic cows samples) are within the normal range. Meanwhile, the majority of repeat breeder cows (60-70% of the repeat breeder cows) had total protein, albumin, and globulin levels lower than the normal range (p<0.05). It could be concluded that there was a relationship between the incidence of repeat breeder and total protein, albumin, and globulin levels in the blood serum of dairy cows with repeat breeder. Therefore, it is suggested to raise awareness of smallholder farmers about proper feeding and feeding management to reduce repeat breeder cases.

Speciation analysis of manganese against the background of its different content in the blood serum of dairy cows.

Studies in the field of microelement speciation in the body of farm animals, in particular dairy cattle, are almost completely absent. The average concentration of Mn in the blood serum of all the studied animals (n = 80) was 2.5 μg/L, which corresponds to normal values. Of the total number of animals, 21% were the cows with the low normal values (serum Mn concentration ≤ 2 µg/L, i.e. less than Q25 of the total sample) and 25% were the animals with the high normal values (serum Mn concentration ≥ 2.72 µg/L, i.e. more than Q75 of the total sample). The data obtained in the course of the study indicate that the change in the Mn level, even in the range of normal values, is accompanied by the redistribution of this element over various protein fractions. The six found Mn blood serum forms are presumably represented by α2-macroglobulin (tetramer, dimer, and monomer), transferrin/albumine, manganese citrates, and "free" metal ions. The analyzed fractions of Mn found in the blood serum of cows had the following hierarchy of concentrations: in the group with low-normal values of Mn ("free" Mn >> tetrameric form of α2-macroglobulin >> transferrin/albumine >> dimeric form of α2-macroglobulin >> monomeric form of α2-macroglobulin >> citrate), in the group with high normal manganese values ("free" Mn >> monomeric form of α2-macroglobulin >> transferring/albumine >> citrate >> tetrameric form of α2-macroglobulin >> dimeric form of α2-macroglobulin). In the group with high normal Mn values relative to the group with low normal values, there was a percentage decrease in the tetrameric fraction of a2-macroglobulin from 17.2 to 4.4%, dimeric fraction of a2-macroglobulin from 6.9 to 2.2%, "free" Mn from 54.3 to 44.4% and an increase in monomeric fraction of a2-macroglobulin from 6.7 to 23.1%, transferrin/albumine from 10.1 to 17.7%, citrate from 4.8 to 8.2%. Our data demonstrate the features of Mn redistribution of dairy cows, which can be used for an extended assessment of the microelement status of animals.

Influence of small peptides on milk productivity and biochemical indicators of blood serum of dairy cows

Influence of small peptides on milk productivity and biochemical indicators of blood serum of dairy cows

Changes in the Spectrum of Free Fatty Acids in Blood Serum of Dairy Cows during a Prolonged Summer Heat Wave.

Simple SummaryHeat stress leads to poor welfare, decreased productivity, and poor product quality. It is known that the content of fatty acids in the blood can reflect the physiological state of the body under normal and pathological conditions. They can be biomarkers for the state of biomembranes associated with inflammation and indicate the state of energy imbalance during chronic heat stress. They perform various functions in the body; therefore, the determination of the spectrum of free fatty acids can be used as biomarkers of these processes. The changes in the spectrum of free fatty acids in the blood serum of dairy cows revealed in our study will make it possible to better understand the physiological state of the organism and possibly indicate ways to maintain the health and milk productivity of animals under conditions of prolonged hyperthermia.This experiment was conducted to study the effect of a prolonged hot period on the fatty acid (FA) composition in blood serum of dairy cows. Eighteen multiparous Holstein cows were randomly assigned to the hyperthermia group (HYP, n = 8) in August (summer season) and the control group (CON, n = 10) in October (autumn season). Blood from animals of the HYP group was collected in one heat wave, which was preceded by a long period of heat stress (HS, temperature-humidity index (THI ≥ 72)). Blood from cows of the CON group was collected under thermal comfort conditions (THI < 68). The spectrum of free fatty acids (FFA) in the blood serum was analyzed by gas chromatography. The concentration of FFA increased, including saturated FAs and monounsaturated FAs, in the blood serum of cows under conditions of prolonged HS. This was associated with the mobilization of FA into the bloodstream from adipose tissue, as a consequence of negative energy balance. An increase in the ratio of n-6/n-3 polyunsaturated FAs may indicate biomembrane dysfunction and adversely affect dairy cows. This study showed that prolonged periods of heat can affect the FA composition of blood. How much this leads to changes in the FA composition of milk and the quality of food products remains to be seen in further research.

Milk productivity of cows and the content of the metal-ligand forms of iron

The milk productivity of animals was evaluated and the content of the metal-ligand forms of iron was studied against the background of changes in the total content of manganese in the blood serum of dairy cows using the hybrid technique (HPLC-ICP-MS). For this purpose, groups were formed for comparing animals with low-normal values of manganese (Mn concentration up to the 25th percentile) and high-normal values (Mn concentration above the 75 th percentile) according to the results of a previous study. The Mn content in the blood serum of all animals was within the physiological normal range. Analysis of the data obtained showed that high-normal levels of manganese in the blood were accompanied by a significant decrease in the indicators of milk productivity of cows. The metal-ligand forms of iron have undergone significant changes. Changes in metal ligand homeostasis can be considered early biomarkers for predicting the state of mineral metabolism to increase productivity.

A rapid blood test to monitor the immune status change of dairy cows and to evaluate their disease risk during the periparturient period

BackgroundDairy cows are at the highest risk of developing clinical and subclinical diseases and disorders in the first few weeks following parturition. During the periparturient period, from approximately 30 days before calving to 30 days postpartum, the immune system of the dairy cows undergoes a multitude of changes to prepare for parturition, colostrum production and lactation. One such change is the transfer of a large amount of immunoglobulin G proteins, especially subclass IgG1 to colostrum, leading to a reduction of IgG1 in the blood. As IgG1 and IgG2 need to maintain a balance to protect animals from intracellular and extracellular pathogens, a disruption of this balance compromises the immune protection of the animals. Rapid tests that can detect these immunological changes may be potentially useful for predicting the risk of dairy cows developing infectious diseases and other adverse health conditions following parturition. ResultsWe report here a new rapid test to detect certain immune status changes in the blood serum of dairy cows. This test uses a nanoparticle probe to evaluate the relative quantity of IgG1 and IgG2 in a sample. The nanoparticle probes are aggregated together upon interaction with bovine IgG2, while bovine IgG1 inhibits such interactions. The nanoparticle aggregates are detected by monitoring the color change of the assay solution using a handheld device. We tested the serum samples from 230 dairy cows collected during periparturient period, from 14 to 7 days before calving to 7–14 days postpartum. Results show that the test clearly detected an immune status change associated with IgG1/IgG2 relative quantity change around the time of parturition. Data analysis using mixed liner model in SAS (Statistical Analysis System) revealed a significant difference (P value = 0.04) in their test responses between healthy cows and cows with mastitis and/or lameness. ConclusionThe new rapid test we report here can be used to detect and monitor certain immune status change in dairy cows during the periparturient period. The test results may be potentially used to evaluate and predict the health risk of the dairy cows following parturition.

A study of Neospora caninum antibody seroprevalence ın dairy cows in Turkey

Neospora caninum is a intracellular protozoan parasite and is one of the major causes of repeated abortions, foetal malformations, pre-term deliveries, stillbirth and possible loss of milk yield in livestock. The presence of specific antibodies against N. caninum in the blood serum of dairy cows is investigated in the present study. A total of 184 blood serum samples of dairy cows were examined in Bursa province in the Marmara Region. N. caninum antibodies were measured using an indirect enzyme-linked immunosorbent assay (ELISA) (The Svanovir Neospora-Ab ELISA). From the total sample, antibodies to N. caninum were detected in 62 of the 184 examined cows (33.3%) and neurological findings were seen in a calf.

Determination of blood serum calcium, inorganic phoshorus and magnesium in different productive stages of holstein dairy cows

Introduction. The aim of this study was to determine and compare levels of blood serum calcium, inorganic phosphorus and magnesium in the peripartal period and during mid lactation in Holstein dairy cattle. Materials and Methods. Blood samples were collected from 12 cows in late pregnancy, 12 early lactation cows, and 12 mid lactation cows. Results and Conclusions. Serum calcium and inorganic phosphorus in blood of dairy cows in early and mid lactation were significantly lower compared to the values in the blood serum of dairy cows in late pregnancy, probably indicating the increased use of these macro elements by the mammary gland at the early stages of lactation. When the cows were in the lactation period, blood serum magnesium levels were significantly lower compared to the values of dairy cows during late pregnancy, probably indicating the increased use of magnesium by the dairy cows during lactation. The results show that the homeostasis of the macro elements examined in the blood of transition and mid lactation dairy cows was maintained, suggesting their adequate supply from alimentary sources.

The concentration of free amino acids in blood serum of dairy cows with primary ketosis.

Ketosis is a common condition found in the initial stages of lactation in high-yielding dairy cows. The major cause of ketosis is a negative energy balance. During the energy deficiency, proteolysis processes develop parallel to lipolysis. During proteolysis, muscle tissue can be used as a source of amino acid. To date, the participation of amino acids in gluconeogenesis (glucogenic amino acids) and ketogenesis (ketogenic amino acids) has not been determined in detail. This paper presents the study on determination of the parameters of protein and free amino acid metabolism in blood serum of dairy cows with primary ketosis compared to healthy cows. This study contributes to better understanding of the role of amino acids in pathogenesis of ketosis. A total of 30 cows, divided into two groups: experimental (15 cows with ketosis) and control (15 healthy cows), were included in the study. The concentrations of glucose, β-hydroxybutyrate, total protein, albumin, urea, and free amino acids were determined in peripheral blood. Statistically significantly higher concentrations of glutamine, glutamic acid, isoleucine (p≤0.001), and tyrosine (p≤0.05) were found in cows with primary ketosis compared to healthy cows. Significant decrease in the concentrations of asparagine, histidine, methionine, and serine (p≤0.001), alanine, leucine, lysine and proline (p≤0.05) was observed. Significant increase of total ketogenic and glucogenic amino acids (p≤0.05), and an increased ratio of total ketogenic and glucogenic amino acids to total amino acids (p≤0.001) were noted in cows with ketosis. In our study, the changes, in particular observed in amino acid concentration in cows with primary ketosis, indicate its intensive use in both ketogenesis and gluconeogenesis processes. Therefore, a detailed understanding of the role that amino acids play in gluconeogenesis and ketogenesis will improve ketosis diagnostics and monitoring the course of a ketosis episode. Perhaps, the prevention of this disease is possible by balancing the appropriate feed ration in terms of amino acid content.

Effect of selenium on the development of selected indicators of fertility in dairy cows

Aim: The aim of this study was to determine selenium (Se) concentration in the blood serum of dairy cows and to establish its influence on the level of production and reproduction traits. Materials and Methods: The study was performed on the farm located in Western Pomerania - Poland and involved 120 cows, which were selected using the analog method on the basis of their physiological state, lactation number, milk yield, age, and genotype. The following indices were analyzed in individual groups: Calving interval, gestation interval, insemination index, standstill of placenta. Se concentration in the blood serum was determined with the spectrofluorometric method. Results: The mean serum Se concentration was in cows 0.038 μg/ml. The use of Se preparations has raised fertility, which was documented statistically. Conclusion: The study revealed that the problem of Se deficiency is still present in some dairy cattle herds in Western Pomerania - Poland.

Milk amyloid A and selected serum proteins in cows suffering from mastitis

The aim of this work was to evaluate the influence of clinical and sub-clinical mastitis on the concentrations of mammary associated isotype of serum amyloid A (M-SAA) in milk samples, as well as on the concentrations of haptoglobin (Hp) and serum amyloid A (SAA), and some other biochemical variables in blood serum of dairy cows (n = 41). The concentrations of aforementioned variables were measured in 4 groups of cows divided according to the results of the clinical examination of the udder and to the results of California Mastitis Test (CMT): group 1 – cows without clinical changes on the mammary gland and with negative CMT, group 2 – cows without clinical changes on the mammary gland and with weakly positive CMT, group 3 – cows without clinical changes on the mammary gland and with strongly positive CMT and group 4 – cows with clinical changes on the mammary gland and changes in milk appearance. The concentrations of M-SAA were analyzed also in 145 quarter’s milk samples which were categorized according to the same criteria as cows used in the study. By the evaluation of M-SAA concentrations in composite milk samples we found significantly the highest mean value in cows with clinical signs of mastitis. Similar findings were recorded in the M-SAA concentrations in quarter’s milk samples. Moreover, higher concentrations of M-SAA were found also in samples from mammary quarters without clinical changes and positive CMT. The analyses of Hp and SAA concentrations showed a trend of higher values in cows with clinical mastitis. The lowest mean concentration of albumin we found in cows with clinical signs of mastitis. Our results indicate elevated production of M-SAA in cows with clinical changes on mammary gland, and suggest the usefulness of this indicator also in the diagnosing of sub-clinical mastitis.

Acute Phase Proteins and their Relation to Energy Metabolites in Dairy Cows during the Pre- and Postpartal Period

The objective of this study was to evaluate the concentrations of selected acute phase proteins – haptoglobin (Hp) and serum amyloid A (SAA), and selected variables of energy metabolism in blood serum of dairy cows during different stages of the pre- and postpartal period. The analyses were performed in dairy cows of the Slovak spotted breed and its crossbreeds (n = 57). The cows were divided into 9 groups according to the evaluated part of reproduction cycle – from 4 weeks before parturition to 10 weeks after parturition. Significant differences were found in mean Hp and SAA concentrations during the monitored period (P &lt; 0.05 and P &lt; 0.001, respectively). Cows during the early postparturient period had significantly higher Hp and SAA concentrations compared to cows in later postparturient period (P &lt; 0.05). Significant differences throughout the period under study was found also in means of total cholesterol (P &lt; 0.01), triglycerides (P &lt; 0.001), and non-esterified fatty acids (P &lt; 0.001). Concentrations of Hp during this period were positively correlated with SAA (R = 0.919; P &lt; 0.001). Moreover, significant correlations were found between Hp and non-esterified fatty acids, Hp and β-hydroxybutyrate, as well as between SAA and non-esterified fatty acids. Our results indicate that the acute phase response occurs in cows around parturition, and suggest that there are relationships between mediators of immune response and several indices of energy metabolism. Our results also suggest that in cows with higher concentrations of non-esterified fatty acids, indicating a certain degree of lipid mobilisation, higher values of acute phase proteins may be found.

Differences in the occurrence of selenium, copper and zinc deficiencies in dairy cows, calves, heifers and bulls

This study was conducted to evaluate the mineral status of various bovine categories reared on the same farm, and to monitor the quality of their mineral nutrition in this way. Blood samples were collected on 20 farms in various regions of the CzechRepublicto diagnose the selenium (Se), copper (Cu) and zinc (Zn) status of dairy cows, calves, heifers and bulls. Blood samples were collected from 5 dairy cows and their calves, 5 heifers and, whenever possible, also from 5 bullocks (10 farms). To assess the Cu and Zn status of the cattle, blood serum concentrations of the elements were determined by flame AAS. The Se status assessment was based on the glutathione peroxidase (GSH-Px) activity in whole blood. Dairy cows and calves showed the higher GSH-Px activity in comparison with heifers and bulls (P &amp;lt; 0.001). Overall mean GSH-Px activity in the blood of dairy cows, calves, heifers and bulls was 720.47 &amp;plusmn; 174.47 &amp;micro;kat/l, 688.34 &amp;plusmn; 204.12 &amp;micro;kat/l, 555.69 &amp;plusmn; 318.36 &amp;micro;kat/l and 516.17 &amp;plusmn; 214.70 &amp;micro;kat/l, respectively. Se deficiency was diagnosed in 23% of the examined dairy cows (20% herds), 31% calves (25% herds), 51% heifers (50% herds) and in 58% of bulls (50% herds). Dairy cows showed lower Zn and higher Cu concentrations in comparison with the other categories (P &amp;lt; 0.001). Mean Zn concentrations in blood serum of dairy cows, calves, heifers and bulls were 12.21 &amp;plusmn; 3.19 &amp;micro;mol/l, 18.91 &amp;plusmn; 5.78 &amp;micro;mol/l, 17.80 &amp;plusmn; 2.76 &amp;micro;mol/l and 16.69 &amp;plusmn; 3.08 &amp;micro;mol/l, respectively. Zn deficiency was diagnosed in 41% of the examined dairy cows (45% herds) and 13% of bulls (10% herds). None of the calf or heifer herds was classified as Zn deficient when Zn deficiency was found in only 9% of calves and 1% of the examined heifers. Mean Cu concentrations in blood serum of dairy cows, calves, heifers and bulls were 13.62 &amp;plusmn; 2.62 &amp;micro;mol/l, 10.18 &amp;plusmn; 3.22 &amp;micro;mol/l, 10.96 &amp;plusmn; 2.52 &amp;micro;mol/l and 11.18 &amp;plusmn; 2.40 &amp;micro;mol/l, respectively. Cu deficiency was diagnosed in 28% of the examined dairy cows (20% herds), 70% of calves (80% herds), 65% of heifers (75% herds) and 70% of bulls (60% herds). Deficiency of at least one of the microelements monitored was diagnosed on all investigated farms.

Influence of somatotropin on level of insulin, T3,T 4, TSH, BST in blood serum of dairy cows at various levels of crude protein in feed

Influence of somatotropin on level of insulin, T₃,T₄, TSH, BST in blood serum of dairy cows at various levels of crude protein in feed

Influence of somatotropin on level of insulin, T3,T 4, TSH, BST in blood serum of dairy cows at various levels of crude protein in feed

Influence of somatotropin on level of insulin, T₃,T₄, TSH, BST in blood serum of dairy cows at various levels of crude protein in feed

Ferritin in Blood Serum of Dairy Cows

Concentration of ferritin in blood serum of dairy cows was measured by a two-site immunoradiometric assay to assess changes in the iron nutritional status during gestation, parturition, and lactation. Although anemia did not occur in pregnancy of dairy cows, there were slight decreases of red cell counts, hemoglobin, and hematcrit in the early stage of lactation. Ferritin concentration remained relatively constant in late gestation (35ng/ml), but deviations were considerable. Ferritin rose gradually from 3 days prepartum with a sharp elevation after parturition. At 1 to 2 wk postpartum, it had increased to about twice amounts in late gestation. During the subsequent 8 wk postpartum, it fell gradually and thereafer maintained almost unchanged (40ng/ml). Both iron in blood serum and total iron-binding capacity declined from 2 wk prepartum to the end of gestation but showed a rise beginning about 2 wk after parturition. Because changes in iron-related proteins just before and after delivery may be results of inflammatory reactions accompanying delivery, ferritin concentration is not a good index for diagnosis of iron deficiency in lactating cows just after parturition.