Comparison of tests for failure of passive transfer in neonatal calf serum using total protein refractometry and the biuret method

2021 ◽  
Vol 189 ◽  
pp. 105290
Author(s):  
Katharine Denholm ◽  
Alexandra Haggerty ◽  
Colin Mason ◽  
Kathryn Ellis
Keyword(s):  
Total Protein ◽  
Calf Serum ◽  
Passive Transfer ◽  
Neonatal Calf ◽  
Biuret Method ◽  
Comparison Of Tests

scholarly journals Salivary IgG levels in neonatal calves and its association to serum IgG: an observational pilot study

2019 ◽  
Vol 3 (1) ◽  
pp. 589-593 ◽  
Author(s):  
Julie Føske Johnsen ◽  
Matteo Chincarini ◽  
Åse Margrethe Sogstad ◽  
Liv Sølverød ◽  
Marie Vatne ◽  
...  
Keyword(s):  
Pilot Study ◽  
Calf Serum ◽  
Passive Transfer ◽  
Dairy Calves ◽  
Strong Positive Correlation ◽  
Adult Cattle ◽  
Future Studies ◽  
Neonatal Calf ◽  
Serum Igg ◽  
Neonatal Calves

Abstract The diagnosis of inadequate transfer of colostrum immunoglobulin G (IgG) to calf serum, often known as failure of passive transfer (<10 g/L IgG1 at 24 to 48 h), necessitates blood sampling from the calf and in some instances the presence of a veterinarian. Sampling saliva is both less invasive and easy for the producer. Previous research has shown that quantification of saliva IgG is possible in juvenile and adult cattle. The objectives of this observational pilot study were to investigate whether IgG can be quantified in neonatal calf saliva, if it is correlated to serum IgG concentrations, and if the indirect quantification of saliva IgG is achievable by use of a digital refractometer. Paired blood and saliva samples were collected from 20 healthy dairy calves aged 1 to 3 d. In these samples, IgG was quantified directly with single radial immunodiffusion and indirectly by use of a digital refractometer indicating Brix % (a subsample of n = 12 saliva samples). A strong positive correlation (r = 0.7, P < 0.001) between saliva IgG (mean ± SD; 0.2 ± 0.11 g/L) and serum IgG (32.1 ± 11.94 g/L) was found. Saliva IgG ranged from the lowest detectable value, 0.1 g/L (n = 6 samples) to 0.6 g/L. Saliva Brix (1.2 ± 0.69%) was not significantly correlated to serum IgG (n = 12, r = 0.43, P = 0.155); however, it was significantly correlated to saliva IgG (n = 12, r = 0.7, P = 0.018) and Brix in serum (n = 12, r = 0.7, P = 0.013). We conclude that IgG was quantifiable in most of the saliva samples. For saliva IgG to be of any value with regards to detecting failure of passive transfer, future studies should investigate methods that can detect IgG <0.1 g/L. The results indicate that saliva IgG can be used to predict serum IgG at levels above 10 g/L, which may warrant further exploration of the use of saliva in the surveillance of failure of passive transfer. The results of the current pilot study did not support the potential usage of a Brix % refractometer to quantify saliva IgG.

scholarly journals 281 Techniques to estimate colostrum quality and the effects of cow age and pre-partum supplement intake levels on colostrum quality and serum IgG levels

2020 ◽  
Vol 98 (Supplement_4) ◽  
pp. 207-208
Author(s):  
Julia M Dafoe ◽  
Samuel Wyffels ◽  
Cory T Parsons ◽  
Boone Carter ◽  
Timothy DelCurto ◽  
...  
Keyword(s):  
Total Protein ◽  
Post Partum ◽  
Good Condition ◽  
Calf Serum ◽  
Good Alternative ◽  
Serum Total Protein ◽  
Serum Igg ◽  
Rapid City ◽  
Serum Igg Levels ◽  
Supplement Intake

Abstract Our study was conducted to evaluate the influence of cow age and supplement intake level during gestation on the quality of colostrum at calving, serum IgG levels of the cow at parturition, and serum IgG levels of the calf 3 days post-partum using two on-farm refractometer methods. Forty-five non-lactating multiparous Angus cows were selected from a contemporary group of 300 cows winter grazing northern mixed grass prairie rangelands with free choice protein supplement. Specifically, 15 first service bred cows were selected for each of the following treatment groups: 1) low supplement intake (> -0.75 SD); 2) average supplement intake (± 0.50 SD); 3) high supplement intake (> +0.75 SD). Supplement intakes were measured using 8 feeding stations in a SmartFeed Pro self-feeder system (C-Lock Inc., Rapid City, SD) and measurements were obtained from d 164 to 215 of gestation. Cows were further divided by age comparing young (4, 5, and 6 yr) to old (7 and 8 yr). Cow age did not interact with supplement intake for any of the colostrum or blood serum measurements (P ≥ 0.29). In addition, cow age and supplement intake did not influence colostrum Brix %, calf serum total protein taken 3 d post-partum or cow serum total protein taken at birth (P ≥ 0.14). The optical refractometer was found to be a good alternative to the more expensive digital refractometer. When regressing values of the two techniques, they were observed to be correlated (P < 0.01; R = .96). In summary, cow age and supplement intake levels of mature cows during the mid to late stages of gestation did not influence colostrum quality at birth. The lack of colostrum quality differences was likely due to the moderate to good condition of the cows and adequate nutrition 90 d prior to parturition.

scholarly journals Risk factors for poor colostrum quality and failure of passive transfer in Scottish dairy calves

2021 ◽  
pp. 1-6
Author(s):  
Alexandra Haggerty ◽  
Colin Mason ◽  
Kathryn Ellis ◽  
Katharine Denholm
Keyword(s):  
Risk Factors ◽  
Calf Serum ◽  
Significant Risk ◽  
Total Coliform ◽  
Passive Transfer ◽  
Dairy Calves ◽  
Dairy Calf ◽  
Serum Samples ◽  
Mixed Effect ◽  
Economic Implications

Abstract Failure of passive transfer (FPT) has health, welfare and economic implications for calves. Immunoglobulin G (IgG) concentration of 370 dairy calf serum samples from 38 Scottish dairy farms was measured via radial immunodiffusion (RID) to determine FPT prevalence. IgG concentration, total bacteria count (TBC) and total coliform count (TCC) of 252 colostrum samples were also measured. A questionnaire was completed at farm enrollment to investigate risk factors for FPT and poor colostrum quality at farm-level. Multivariable mixed effect logistic and linear regressions were carried out to determine significant risk factors for FPT and colostrum quality. Prevalence of FPT at calf level was determined to be 14.05%. Of 252 colostrum samples, 111 (44.05%) failed to meet Brix thresholds for colostrum quality. Of these 28 and 38 samples also exceeded TBC and TCC thresholds, respectively. Increased time between parturition and colostrum harvesting was numerically (non-significantly) associated with a colostrum Brix result <22%, and increased time spent in a bucket prior to feeding or storing was significantly associated with high TBC (≥100 000 cfu/ml and also ≥10 000 cfu/ml). High TBC values in colostrum were significantly associated with lower serum IgG concentrations. This study highlights associations between colostrum quality and FPT in dairy calves as well as potential risk factors for reduced colostrum quality; recommending some simple steps producers can take to maximise colostrum quality on farm.

scholarly journals EXERCISE-INDUCED CHANGES IN THE LEVEL OF TOTAL PROTEIN AND ITS FRACTIONS IN THE BLOOD OF HORSES INVOLVED IN RECREATIONAL HORSEBACK RIDING

2020 ◽  
pp. 35-46
Author(s):  
Halyna Tkachenko ◽  
Natalia Kurhaluk ◽  
Irina Tkachova
Keyword(s):  
Total Protein ◽  
Colorimetric Method ◽  
Exercise Session ◽  
Rank Test ◽  
Horseback Riding ◽  
Jugular Veins ◽  
Blood Samples ◽  
Biuret Method ◽  
G Ratio ◽  
Resting Period

The aim of the current study was to do the analysis of the total protein and its fraction in the blood samples of horses, which are involved in recreational horseback riding in the Pomeranian region (Pomeranian Voivodship, northern Poland). Thirteen healthy adult horses from the Pomeranian region in Poland (Strzelinko village, N54°30´48.0´´ E16°57´44.9´´), aged 9.5±2.4 years, including 5 Hucul ponies, 2 Thoroughbred horses, 2 Anglo-Arabian horses, and 4 horses of unknown breed, were used in the current study.Training started at 10:00 AM, lasted 1 hour, and consisted of a ride of cross country by the walking (5 min), the trotting (15 min), the walking (10 min), the trotting (10 min), the walking (5 min), the galloping (5 min), and the walking (10 min). Blood samples were taken from the jugular veins of the animals in the morning time, 90 minutes after feeding, while the horses were in the stables (between 8:30 and 10 AM), and immediately after the exercise session (between 11:00 AM and 2:00 PM). To obtain serum, the blood was collected in plain tubes without anticoagulants. Blood was stored in tubes with K3-EDTA and held on ice until centrifugation at 3,000g for 15 minutes. The plasma was removed.The total protein and its fractions were measured at +23°C by the biuret method with the use of commercially available reagents and a compact semi-automated analyzer RX Monza (Randox Laboratories LTD., UK) according to the procedures described by the manufacturer. The biuret method is the most widely used colorimetric method for the determination of the total protein concentration in serum because of its simplicity, precision, and accuracy. The absorbance of each sample was measured in duplicate.Results are expressed as mean ± S.E.M. All variables were tested for normal distribution using the Kholmogorov-Smirnov test (p>0.05). To find significant differences (significance level, p<0.05) between at the rest and after exercise, the Wilconson signed-rank test was applied to the data. All statistical analyses were performed using STATISTICA 8.0 software (StatSoft, Krakow, Poland). The total protein level in the blood of horses exhibited a non-significant increase (by 7.1%, p>0.05) immediately after exercise as compared to the resting period. Also, the albumin and globulin levels in the blood of horses were non-significantly increased by 5.9% (р>0.05) and 8.1% (р>0.05) after the training sessions. There were no significant differences in serum albumin/globulin ratio between the resting period and after exercise (0.997±0.09 vs. 0.977±0.08). The results of our current study showed that exercise has a statistically non-significant effect on the total proteins and their fractions in equine serum. The fractions and the A/G ratio were within the range of values obtained in horses in other studies. Thus, it was found that total protein and its fractions were increased in horses after training, and this increase was insignificant. This increase has a direct correlation with exercise. In this paper, it is shown that training can change the physiology and affect the biochemistry of hematobiochemical blood parameters in horses subjected to physical exertion.

scholarly journals Vitamin E Concentration in Colostrum and Neonatal Calf Serum from Dams Administrated Vitamin E Daily or Intermittently

1999 ◽  
Vol 52 (11) ◽  
pp. 699-701
Author(s):  
Gensei TSUNODA ◽  
Hironori HIROSE ◽  
Kazuyuki SUZUKI ◽  
Hiromi HANAZUMI
Keyword(s):  
Vitamin E ◽  
Calf Serum ◽  
Neonatal Calf

Assay of cerebrospinal fluid protein: a rate biuret method evaluated.

1983 ◽  
Vol 29 (1) ◽  
pp. 126-129 ◽  
Author(s):  
P R Finley ◽  
R J Williams
Keyword(s):  
Cerebrospinal Fluid ◽  
Total Protein ◽  
Protein Concentration ◽  
Protein A ◽  
Colorimetric Method ◽  
Total Protein Concentration ◽  
Reaction Cell ◽  
Biuret Method ◽  
Automated Instrument ◽  
Cerebrospinal Fluid Protein

Abstract We evaluated a rate colorimetric method (Beckman) for measuring total protein in cerebrospinal fluid. The automated instrument we used was Beckman's ASTRA TM. A 100-microL sample of spinal fluid is introduced into the biuret reagent in the reaction cell and the increase in absorbance at 545 nm is monitored for 20.5 s. Solid-state circuits determine the rate of alkaline biuret-protein chelate formation, which is directly proportional to the total protein concentration in the sample. The linear range of measurement is 120 to 7500 mg/L. Day-to-day precision (CV) over the range of 150 to 1200 mg/L ranged from 15.2 to 2.3%. The method was unaffected by radical alteration of the albumin/globulin ratio, but there is a positive interference in the presence of hemoglobin, a suppression in the presence of bilirubin, and no effect by xanthochromia. The method is precise, accurate, rapid, and convenient. The method was compared with the trichloroacetic acid method as performed on the Du Pont aca III, giving a correlation coefficient (r2) of 0.9693. The method is precise, accurate, rapid, and convenient.

Effects of dextran on five biuret-based procedures for total protein in serum.

1985 ◽  
Vol 31 (12) ◽  
pp. 2018-2019 ◽  
Author(s):  
D B Barnes ◽  
G F Pierce ◽  
D Lichti ◽  
M Landt ◽  
J Koenig ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Total Protein ◽  
Serum Samples ◽  
Biuret Method ◽  
Automated Instruments ◽  
Roche Cobas

Abstract We evaluated the effect of dextran on values for total protein in serum as measured by the biuret method with five widely used automated instruments: the American Monitor Parallel; the Du Pont aca II; the Roche Cobas-Bio; the Kodak Ektachem 400; and the Beckman Astra 8. Dextran concentrations as great as 25 or 30 g/L had relatively little or no influence on total protein measurements by the latter three instruments. Dextran concentrations exceeding 6 g/L caused falsely low results with the aca, whereas the Parallel gave falsely high results when the dextran concentration exceeded 2 g/L. The aca total protein procedure could be protected from the interference by dextran concentrations up to 30 g/L by injecting 0.4-0.8 mL of ethylene glycol directly into the reagent pack before sampling. However, we could not eliminate the interference with the Parallel procedure by any simple means; we thus recommend that it not be used for measuring total protein in serum samples from patients who are being treated with dextran.

Concentration of dipotassium ethylenediaminetetraacetic acid but not lithium heparin affects total protein determination in equine synovial fluid

2020 ◽  
Vol 187 (8) ◽  
pp. e62-e62
Author(s):  
Pablo Jimenez Rihuete ◽  
Nicolas Villarino ◽  
Alicja Pelisiak ◽  
Luis M Rubio-Martinez
Keyword(s):  
Synovial Fluid ◽  
Cross Section ◽  
Total Protein ◽  
Gold Standard ◽  
Ethylenediaminetetraacetic Acid ◽  
Protein Determination ◽  
Collection Tube ◽  
Refractometric Determination ◽  
Biuret Method

BackgroundRefractometric determination of total protein (TP) in synovial fluid (SF) is commonly used for diagnosis and monitoring of synovial sepsis in horses. Previous studies have shown that elevated concentrations of certain anticoagulants may overestimate refractometric determination of TP concentration.ObjectivesThe aim of the study was to evaluate the effect of different concentrations of dipotassium EDTA (K2EDTA) and lithium heparin (LH) on TP determination by using a hand-held refractometer in equine synovial fluid.Study designCross-section observational study.MethodsThirty samples of synovial fluid obtained from 22 horses with different synovial conditions were collected. Synovial fluid samples were separated into different aliquots and placed in commercially available collection tubes containing K2EDTA or LH at four different concentrations (1.76, 3.52, 7.04 and 17.6 mg/ml for K2EDTA; 16, 32, 64 and 160 IU/ml for LH) . Refractometric TP determination was performed on untreated and K2EDTA and LH aliquots with a hand-held refractometer and by spectophotometric Biuret method as the gold standard.ResultsRefractometric TP determination was overestimated in SF samples containing 10 times the recommended K2EDTA concentrations. Lower concentrations of K2EDTA and LH concentrations did not affect refractometric TP determinations.Main limitationsLimited number of samples mostly obtained from large synovial structures.ConclusionTo avoid incorrect TP determination, the use of LH containing collection tubes may be an appropriate alternative when the SF volume available is not enough to fill the K2EDTA collection tube.

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