Morfologia placentária e parâmentros fisiológicos de potros neonatos da raça campolina

• Autor(a) principal: Oliveira, Marcela
• Data de Publicação: 2017
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da Universidade Federal do Espírito Santo (riUfes)
• Texto Completo: http://repositorio.ufes.br/handle/10/7787
• topic: Biochemist; Hematology; Equine neonatal viability; Bioquímico; Hematologia; Viabilidade neonatal equina; Medicina Veterinária; Bioquímica; Hematologia veterinária; Equino - Reprodução; Reprodução animal; 619

The association of the physiological evaluation, biochemical and haematological neonatal, from birth, together with macroscopic assessment and placenta morphological are particularly important to identify early and promptly treat foals who suffers with dysfunction placental. In this sense, the objective of this study was to evaluate placental morphology and physiological, hematological and biochemical parameters in newborn Campolina foals. Eight births were monitored, and eight Campolina neonatal foals of both sexes were studied, newborns up to 48 hours of life. Immediately after expulsion, the placentas were macroscopically evaluated. After, it was collected and sent for histopathology exam the samples to check for gravid horn, non-gravid horn, the uterus’s body and cervical star. Neonates were evaluated for general health, body weight , heart and respiratory rates, rectal temperature, staining and conjunctival mucosa, behavior, capillary refill time, oral mucosa of neonatal reflexes according to the APGAR scale. The clinical parameters were evaluated in three intervals: immediately after at birth, 24 and 48 hours. Blood samples were collected into jugular venous to check glucose, lactate determination, hematological and biochemical analysis were obtained in the immediate postpartum period and every 12, 24 and 36 hours of life. All analyses were performed using a software GraphPad Instat, version 3.06. For parametric variables the student test was used. For the non-parametric variables, the Kruskal-Wallis test was used. There were no significant hematologic values difference (p<0,05) in a range of 0 to 36 hours post birth. There was no significant change in FC, FR and T (° C) in the studied moments. Neonates showed no behavioral changes during the trial period. One placenta looked rough and thicker in the gravid horn region with a brown mucoid secretion. The histopathology exam presented a focal necrosis areas with visible changes in the placenta. Others placentas didn´t show macroscopic changes and/or note worthy histopathology . All foals remained healthy throughout the experimental period. There were no significant differences (p <0.05) in serum concentrations of gamma glutamyl transferase, calcium, phosphorus, magnesium, cholesterol and triglycerides between the studied moments. Concentrations of total serum proteins (PT) showed a significant increase (p <0.05) between 0 and 36 hours of life. In the evaluation of serum albumin, a significant reduction (p <0.01) was observed between 0 and 24 hours of life. In relation to the activity of the alkaline phosphatase enzyme, a significant reduction (p <0.01) was observed between 0 and 36 hours of life. Serum concentrations of the enzyme aspartate aminotransferase were significantly (p <0.001) higher at times 12, 24 and 36 hours relative to birth. Serum urea concentrations were significantly lower at time 24 (* p <0.05) and 36 hours (** p <0.01) relative to birth. In the evaluation of serum creatinine, there was a significant reduction of the concentration at moments 12, 24 and 36 hours in relation to the birth (*** p <0.001), a significant decrease between moments 12 and 36 hours of life (* p < 0.05). In the evaluation of glycemia, a significant increase (p <0.001) was observed after 12 hours, stabilizing within 24 and 36 hours of life. Regarding serum lactate concentrations, a significant decrease in birth was observed for 24 hours. Since the studied foals did not show changes in the clinical parameters indicative of systemic impairment in the interval from 0 to 48 hours post birth, the changes observed in the biochemical parameters may reflect only the neonatal neuroendocrine adaptation to the external environment. Placentas were cleared at the appropriate time. Only one placenta presented areas of loss of function. The neonate referring to this placental sample showed a satisfactory response to the observed changes.