Heart rate and salivary cortisol concentrations in foals at birth

Nagel, Christina; Erber, R.; Ille, Natascha; Wulf, Manuela; Aurich, Jörg; Möstl, Erich; Aurich, Christine

doi:10.1016/j.tvjl.2014.11.013

Cited by 18 publications

(11 citation statements)

References 11 publications

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“…The present study showed that cortisol concentration at rest was less variable in horses older than one year, which contrast to neonates in their fi rst two hours of life (Nagel et al, 2015). However, there are reports indicating a reduction in sensitivity to the negative feedback of cortisol with increasing age (Gust et al, 2000), which may explain the upward trend in group C. A report with healthy neonates and 6-hour-old CCH (3.42 ± 1.47 μg/dL; Moreno, 2009) showed a lower value than that observed in this study, which coincides with the results by comparing basal cortisol in neonates and healthy adults considering that large variations occur immediately after birth.…”

Section: Discussioncontrasting

confidence: 43%

Serum cortisol concentration in the Colombian Creole Horse

Zuluaga¹,

Martı́nez

2017

Rev Colomb Cienc Pecu

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Concentración del cortisol sérico en el caballo criollo colombiano Concentração de cortisol sérico no cavalo crioulo colombianoAbstract Background: Cortisol is indicative of adaptation to physiological factors, disease and environmental stress in equines. Cortisol recently gained attention for its prognostic value in critical disease and as an indicator of fi tness and athletic performance. Objective: To determine baseline serum cortisol (SC) morning concentrations in the Colombian creole horse (CCH). Methods: Blood serum was taken from 62 CCH of both genders with and average age of 8.8 years (± 5.3), which were clinically healthy and had diff erent performance levels. Results: The overall SC average determined by sandwich ELISA was 13.3 ± 7.4 mg/dL. No signifi cant diff erences were attributed to gender, age, or performance. Conclusion: This concentration can be used as a reference value for CCH maintained in low physical activity.

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Section: Discussioncontrasting

confidence: 43%

Serum cortisol concentration in the Colombian Creole Horse

Zuluaga¹,

Martı́nez

2017

Rev Colomb Cienc Pecu

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“…Birth and the demands of immediate adaption to the extrauterine environment thereafter have been postulated to be amongst the most stressful events of life. Stress responses include sympathoadrenal activity and activation of the hypothalamo-pituitary-adrenocortical axis with increased cortisol release (Nagel et al 2015). The sympathoadrenal system stimulates cardiac function, pulmonary surfactant release, absorption of fluid from the lungs, energy mobilisation and thermogenesis (Irestedt et al 1982, Downing and Lee 1983, Padbury et al 1987.…”

Section: Introductionmentioning

confidence: 99%

Salivary cortisol, heart rate and heart rate variability in healthy and diseased neonatal foals

Nagel¹,

Aurich²,

Aurich³

2018

PHK

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In this study, parameters indicative of adrenocortical and sympathoadrenal function were determined in foals (n = 43). Foals were assigned to the following groups: Healthy home (n =10, born and kept at their home stud), Healthy clinic (n =11, born to mares hospitalized for surveillance of foaling), Colostrum (n = 4, received colostrum by bottle or nasogastric tube, no signs of disease), Failure of passive transfer (n = 8, received hyperimmune serum, no signs of disease), Sepsis (n = 5) and Prematurity (n = 5). Saliva for cortisol analysis was collected four times daily and heart rate for analysis of heart rate variability (HRV) was recorded once daily during the first 5 days of life. On day 1, cortisol concentration was elevated (p < 0.001), reflecting the demands of neonatal adaptation, but did not differ among groups. On days 2-5, cortisol concentration in premature foals, was higher (p < 0.05) than in all other groups, indicating adrenal maturation. Cortisol concentration did not differ between foals that required frequent examination and treatment and healthy foals. This indicates that handling was not perceived as stressful. In none of the foal groups, salivary cortisol concentration was reduced compared to healthy foals. Heart rate in septic foals was elevated throughout the observation period (p < 0.05) but this was not associated with a poor outcome. Heart rate was not influenced by handling of the foals. The HRV did not differ among groups and sepsis was not associated with decreased HRV, at least if treatment is initiated early. In conclusion, adrenocortical and sympathoadrenal function of foals was neither consistently activated nor depressed by neonatal sepsis. Increased cortisol release in premature foals in the first days of life may reflect maturational processes that occur already shortly before birth in term foals.

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“…With the availability of portable electrocardiogram (ECG) recorders, fetomaternal electrocardiography has recently become available for large animals but so far has near-exclusively been used in horses [12][13][14]. However, the technique is also of interest in cattle, both for research and clinical use.…”

Section: Introductionmentioning

confidence: 99%