scholarly journals Parameters of glucose tolerance test traits in dairy cattle

2006 ◽  
Vol 49 (2) ◽  
pp. 120-132
Author(s):  
G. Freyer ◽  
R. Staufenbiel ◽  
E. Fischer ◽  
L. Panicke
Keyword(s):  
Glucose Tolerance ◽  
Dairy Cattle ◽  
Fixed Effects ◽  
Glucose Tolerance Test ◽  
Original Data ◽  
Tolerance Test ◽  
Logarithmic Transformation ◽  
Breeding Values ◽  
Glucose Challenge ◽  
Dairy Bulls

Abstract. Numerous studies in dairy cattle focused on measuring the content of hormones, metabolites and enzyme activities in blood. Response on glucose challenge in 620 dairy bulls within a defined period of 340 … 450 days of age is targeted on within this paper. The time response course after glucose challenge was the basis for selecting corresponding response traits. Deviation from normal distribution was taken into account by means of comparing parameters of original data, after logarithmic transformation and breeding values obtained from both. The residual plots did not confirm the necessity of logarithmic transformation. After evaluating fixed effects trait-specifically, individual breeding values for glucose tolerance test traits were estimated. Heritability coefficients were promising for using these traits in cattle breeding. Trait specific heritability coefficients for G0 was 0.22 and 0.26, for Ga 0.23 and 0.18, for GHL 0.31 and 0.39 from logarithmic and original trait observations, respectively.

scholarly journals Role of positive glucose challenge test only versus oral glucose tolerance test in pregnancy outcome: a comparative study

2019 ◽  
Vol 9 (2) ◽  
pp. 1545-1549
Author(s):  
Neha Homagai ◽  
Nirajan Mainali ◽  
Sikha Rijal
Keyword(s):  
Glucose Tolerance ◽  
Oral Glucose Tolerance Test ◽  
Glucose Tolerance Test ◽  
Challenge Test ◽  
Tolerance Test ◽  
Oral Glucose ◽  
Oral Glucose Tolerance ◽  
Glucose Challenge Test ◽  
Increased Risk ◽  
Glucose Challenge

Background: Gestational diabetes mellitus is defined as any degree of glucose intolerance which is first recognized during pregnancy and is associated with a number of adverse perinatal outcomes, such as neonatal hypoglycemia, macrosomia with an increased risk of shoulder dystocia and the need for neonatal intensive care. Maternal complications include pre-eclampsia and an increased risk of caesarean delivery. The objective of this study was to compare maternal and perinatal outcomes in pregnant women with positive and negative oral glucose tolerance test following positive glucose challenge test. Materials and Methods: This is a prospective observational hospital based study of 120 patients admitted in Nobel Medical College Teaching Hospital, Biratnagar with glucose challenge test positive pregnancy for delivery. Oral glucose tolerance test was performed in all the glucose challenge test positive pregnant and compared with various maternal parameters and newborn’s conditions. Results: Among 120 patients included in the study, 28 (30.4%) cases were oral glucose tolerance test. Pregnancy induced hypertension was present in 12 cases. Hyperbilirubinemia was present in 42, hypoglycemia in 32, respiratory distress in 44, birth asphyxia in 15 and macrosomia in 6 cases. Conclusions: Pregnancy induced hypertension and hyperbilirubinemia were found to be significantly higher in OGTT positive cases so early detection of GDM screening via is advisable

scholarly journals Zum Glukosetoleranztest beim Rind 1. – Mitteilung: Beziehungen zum Laktationsabschnitt und zur Milchleistung

1999 ◽  
Vol 42 (1) ◽  
pp. 45-56
Author(s):  
R. Staufenbiel ◽  
U. Reinicke ◽  
L. Panicke
Keyword(s):  
Glucose Tolerance ◽  
Dairy Cattle ◽  
Milk Yield ◽  
Glucose Tolerance Test ◽  
Post Partum ◽  
Tolerance Test ◽  
Test Results ◽  
Dry Period ◽  
Stage Of Lactation ◽  
Holstein Friesian

Abstract. Titel of the paper: Investigations into glucose tolerance test in cattle. I. Relations to stage of lactation and milk yield. Intravenous glucose tolerance test was used in 104 randomly selected milk cows to proove the influence of stage of lactation on test results. The test period enclosed the time from 8 weeks ante partum ( begin of dry period) to 36 weeks post partum. In another trial the glucose tolerance test was applied in 68 first lactation cows in the time from 2 to 7 days post partum. The test results were correlated to parameters of milk yield of the following lactation. The probands belong to two breeds (Friesian Dairy Cattle, SMR and Holstein-Friesian HF) The Parameters of glucose tolerance test show significant changes in the time from the dry period to the lactation cycle, which can be seen as a mean for supporting milk production. The glucose and insulin related parameters differ in their reaction in dependence on time of lactation. Back fat thickness as an parameter for body fat content shows a similar behaviour as insulin related parameters. In this context their were prooved significant correlation coefficients between parameters of milk yield and insulin function in the range from 0 3 to 0 6 But there were seen no relevant relations between glucose related parameters and milk yield datas. No substantial differences were established between the Friesian Dairy Cattle and Holstein-Friesian cows.

scholarly journals Zusammenhang zwischen Parametern des Glukosetoleranztestes bei Jungbullen und deren Nachkommenzuchtwert

2000 ◽  
Vol 43 (3) ◽  
pp. 231-240 ◽  
Author(s):  
L. Panicke ◽  
R. Staufenbiel ◽  
O. Burkert ◽  
E. Fischer ◽  
F. Reinhardt
Keyword(s):  
Glucose Tolerance ◽  
Glucose Tolerance Test ◽  
Correlation Coefficients ◽  
Tolerance Test ◽  
Intravenous Glucose Tolerance Test ◽  
Breeding Value ◽  
Central Position ◽  
Intravenous Glucose ◽  
Genetic Determination ◽  
Breeding Values

Abstract. Title of the paper: Relationships between parameters of the glucose tolerance test by young sires and estimated their breeding values A high milk Performance connected to a sound health regarding metabolism and a sufficient fertility in dairy cows depends on a well balanced distribution of energy in body. The terms "type of tumover" and "type of deposition" embody two extremes of food energy preferably for milk production or for body composition. Insulin plays an outstanding role based on its central position in energetic metabolism. The function of insulin may be recorded by means of the intravenous glucose tolerance test (GTT). The reaction of insulin and glucose was investigated after infusion of 1 g Glucose/kg075 because of the probable genetic determination of the reactive ability. The coefficients of heritability range from h2 = 0.16 + 0.10 to h2 = 0.28 ± 0.16. Investigating 28 sires the correlation coefficients amount to r = 0.5 for parameters of gluccose tolerance test and estimated breeding values which is closer than those between pedigree breeding value and glucose tolerance test.This is expecting additional Information for young sires before the insert of the test.

The association between an oral glucose tolerance test performed at term pregnancy and obstetric outcomes

2021 ◽  
pp. 1753495X2110556
Author(s):  
Oren Barak ◽  
Israel Yoles ◽  
Tamar Wainstock ◽  
Noa Gadassi ◽  
Tal Schiller ◽  
...  
Keyword(s):  
Glucose Tolerance ◽  
Oral Glucose Tolerance Test ◽  
Glucose Tolerance Test ◽  
Challenge Test ◽  
Tolerance Test ◽  
Oral Glucose ◽  
Oral Glucose Tolerance ◽  
Term Pregnancy ◽  
Glucose Challenge Test ◽  
Glucose Challenge

Aims Assessing the value of oral glucose tolerance test performed at term pregnancy in identifying obstetric complications. Methods Retrospective cohort study of women with a normal 50 g glucose challenge test who also had an oral glucose tolerance test at term (defined as at or after 37 weeks of gestation). Comparison between the pathological and normal oral glucose tolerance test groups was performed. Results The mean glucose in the glucose challenge test of women in the normal oral glucose tolerance test ( n = 256) group was lower than that in the pathological oral glucose tolerance test ( N = 16) group (105 ± 17 mg/dl (5.8 ± 0.9 mmol/l) vs 117 ± 13 mg/dl (6.5 ± 0.7 mmol/l), p = 0.007). Relevant obstetrical complications did not differ significantly between the groups. Of note, in the pathological oral glucose tolerance test group only one woman delivered a macrosomic infant. Conclusions A pathological oral glucose tolerance test performed at term was unable to identify women at risk for impaired glucose metabolism-related obstetric complications and is therefore of limited clinical value and seems to be unjustified.

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