Influence of age, season, and pregnancy upon blood parameters in Austrian Karakul sheep

Baumgartner, Walter; Pernthaner, A.

doi:10.1016/0921-4488(94)90090-6

Cited by 36 publications

(34 citation statements)

References 5 publications

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“…The pattern of GLDH levels followed those of urea, indicating that amino-acid catabolism decreased throughout pregnancy and enabled partitioning of amino acids for fetal growth. Baumgartner and Pernthaner (1994) observed similar results for GLDH in Karakul sheep; younger sheep had higher GLDH levels than older sheep, in addition to differences during the reproductive cycle and varying seasons of the year. Plasma concentrations of AST decreased throughout pregnancy.…”

Section: Effect Of Physiological Status On Analyte Concentrationssupporting

confidence: 70%

The relationship between feed efficiency and the circadian profile of blood plasma analytes measured in beef heifers at different physiological stages

Gonano

Montanholi

Schenkel

et al. 2014

Animal

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The characterization of blood metabolite concentrations over the circadian period and across physiological stages is important for understanding the biological basis of feed efficiency, and may culminate in indirect methods for assessing feed efficiency. Hematological analyses for albumin, urea, creatine kinase, glutamate dehydrogenase, aspartate aminotransferase, carbon dioxide, and acetate were carried out in growing and gestating heifers. These measures were carried out in a sample of 36 Bos taurus crossed beef heifers held under the same husbandry conditions. Hourly blood samples were collected over a 24-h period on three separate sampling occasions, corresponding approximately to the yearling (and open), early-gestation and late-gestation stages. This design was used to determine variation throughout the day, effects due to physiological status and any associations with feed efficiency, as measured by residual feed intake. Blood analyte levels varied with time of day, with the most variation occurring between 0800 and 1600 h. There were also considerable differences in analyte levels across the three physiological stages; for example, creatine kinase was higher ( P < 0.05) in open heifers, followed by early-and late-gestation heifers. Feed efficiency was also associated with analyte abundance. In more feed-efficient open heifers, there were higher activities of creatine kinase ( P < 0.05) and aspartate aminotransferase ( P < 0.05), and lower concentrations of carbon dioxide ( P < 0.05). Furthermore, in late gestation, more efficient heifers had lower urea concentrations ( P < 0.05) and lower creatine kinase levels ( P < 0.05). Over the whole experimental period, carbon dioxide concentrations were numerically lower in more feed efficient heifers ( P = 0.079). Differences were also observed across physiological stages. For instance, open heifers had increased levels ( P < 0.05) of creatine kinase, aspartate aminotransferase, carbon dioxide than early and late pregnancy heifers. In essence, this study revealed relevant information about the metabolic profile in the context of feed efficiency and physiological stages. Further optimization of our approach, along with the evaluation of complementary analytes, will aid in the development of robust, indirect assessments of feed efficiency.

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Section: Effect Of Physiological Status On Analyte Concentrationssupporting

confidence: 70%

The relationship between feed efficiency and the circadian profile of blood plasma analytes measured in beef heifers at different physiological stages

Gonano

Montanholi

Schenkel

et al. 2014

Animal

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“…The present study showed seasonal variations of serum GGT, AST, GLDH and bile acids, which seemed to be similar to the findings published by in healthy horses without liver changes evaluated by histopathological examination in liver biopsies. According to our study, Gwaze et al (2012) and Baumgartner and Pernthaner (1994) reported a similar seasonal variation of serum AST, CK, GLDH and GGT in goats and sheep. Gwaze et al (2012) suggested that gastrointestinal parasites induced the elevation of GGT in the summer in sheep and goats.…”

Section: Discussionsupporting

confidence: 49%

Monthly changes of standard serum liver parameters of clinically healthy horses over a period of 24 months

Gabe¹,

Fedtke²,

Pankraz³

et al. 2018

PHK

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Summary: Horses that are in good health sometimes reveal in routine blood screenings increased serum activities of gamma-glutamyltransferase (GGT), glutamate-dehydrogenase (GLDH) as well as aspartate-aminotransferase (AST) without any corresponding clinical signs. For that reason, the aim of this study was to assess physiological changes of standard serum liver parameters in a population of normal warmblood horses in training over a period of 24 months. The study was conducted between March 2012 and February 2014. The study population consisted of 14 clinically healthy warmblood horses that were used as police horses. Body weight, body condition score and nutrition history were assessed monthly. The nutrient supply was calculated by ration formulation. Throughout the study feed samples of hay, straw, oats and complementary feeds were obtained on a monthly basis as well as blood samples (n = 334). A complete blood count was performed. The clinical chemistry panel consisted of serum hepatic enzyme activity evaluation including GGT, GLDH, AST as well as the analysis of total bilirubin, bile acids, total protein and albumin. The median hematological parameter as the median serum concentrations of bilirubin, bile acids, total protein and albumin were within the upper reference ranges. In certain months the median activities of AST, GGT and GLDH exceeded the upper reference limits. Furthermore, significant seasonal fluctuations (p < 0.05) of bile acids, AST, GGT and GLDH were assessed.

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“…Nesse estudo ainda avaliaram a influência do fator etário e determinaram maiores valores de proteína total e maiores atividades de AST e GGT em animais mais jovens e também maiores teores de GGT em animais em lactação. Baumgartner e Pernthaner 16 avaliaram a influência da lactação que determinou maiores atividades séricas de GGT e AST em relação aos demais estados fisiológicos. Avaliaram também a influência da idade, do sexo, da raça e da estação do ano sobre as concentrações séricas e não encontraram significâncias atribuíveis a estes fatores.…”

Section: Introductionunclassified

Influência dos fatores sexuais e etários sobre a proteína total, fração albumina e atividade sérica de aspartato-aminotransferase e gama-glutamiltransferase de ovinos da raça Santa Inês

Meira

Rizzo

Benesi

et al. 2009

Braz. J. Vet. Res. Anim. Sci.

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O presente estudo estabelece valores de referência dos teores séricos de proteínas totais, albumina, AST e GGT em ovinos da raça santa Inês e avalia a interferência de fatores sexuais e etários sobre estas variáveis. Foram colhidas amostras de sangue de 161 ovelhas. O resultado encontrado para os valores padrões séricos foram 5,86 + 0,96 g/dL para proteínas totais, 2,33+0,43 g/dL para albumina, 63,25+27,52 U/L para AST e 28,45+14,53 U/L para GGT. A análise dos resultados permite afirmar que os valores referentes à concentração sérica de albumina e à atividade sérica de AST sofrem influência de fatores sexuais e etários, e os valores referentes à atividade sérica de GGT sofrem influência somente de fatores etários. Não foram encontradas influências dos fatores sexuais e etários para os outros parâmetros estudados.

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Influence of age, season, and pregnancy upon blood parameters in Austrian Karakul sheep

Cited by 36 publications

References 5 publications

The relationship between feed efficiency and the circadian profile of blood plasma analytes measured in beef heifers at different physiological stages

The relationship between feed efficiency and the circadian profile of blood plasma analytes measured in beef heifers at different physiological stages

Monthly changes of standard serum liver parameters of clinically healthy horses over a period of 24 months

Influência dos fatores sexuais e etários sobre a proteína total, fração albumina e atividade sérica de aspartato-aminotransferase e gama-glutamiltransferase de ovinos da raça Santa Inês

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