Blood biochemical parameters of Brazilian sport horses under training in tropical climate

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Abstract

ABSTRACT This study aimed to provide baseline data for the serum biochemical parameters of Brazilian sport horses undergoing physical training for eventing to be used as a practical guide. A total of 139 blood samples were collected by vacuum venipuncture of the jugular vein from healthy horses in training. Tubes without anticoagulant were used for biochemical analysis. Means and standard deviations were determined for aspartate aminotransferase (AST) (306.27±84.66 U/L), creatine kinase (CK) (181.06±80.38 U/L), urea (29.51±5.82 mg/dL), creatinine (1.44±0.20 mg/dL), gamma glutamyl transferase (GGT) (14.58±6.55 U/L), calcium (13.22±0.59 mg/dL), and albumin (2.86±0.16 g/dL). The specific reference ranges were: AST, 197-454 U/L; CK, 116-290 U/L; urea, 22-42 mg/dL; creatinine, 1.2-1.8 mg/dL; GGT, 9-26 U/L; calcium, 12.2-14.2 mg/dL; and albumin, 2.6-3.1 g/dL. Beneficial effects of the training program on the horses were observed and these effects did not lead to any changes in the biochemical parameters studied. The environment may influence the serum biochemical parameters, particularly AST and CK, of Brazilian sport horses.

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Formação e estrutura populacional do eqüino Brasileiro de Hipismo

I.M.G. Dias, J.A.G. Bergmann, A.C.C Rezende … (2000)

Analisaram-se dados do Stud Book Brasileiro do Cavalo de Hipismo, da Associação Brasileira de Criadores do Cavalo de Hipismo (ABCCH), correspondentes a julho de 1977 a setembro de 1998. O arquivo final continha 19.303 eqüinos, 11.508 da raça Brasileira de Hipismo (BH) e 7.795 de raças formadoras. Distribuição de freqüência, medidas de tendência central e de dispersão por criador, proprietário, sexo, tipo de registro, estado do nascimento, raça formadora, cruzamento utilizado na formação e coeficiente de endogamia foram estabelecidas para os efetivos da raça BH. Foram também calculados número da geração de cada animal, intervalo de gerações (anos) e tamanho efetivo da população (Ne). Vinte raças foram utilizadas na formação do BH, sendo as principais: BH (22,5%), animais sem genealogia conhecida (21,9%), PSI (15,0%), Hanoverana (8,1%), Westfalen (5,2%), Holsteiner (4,8%) e Trakehner (4,1%). Registros foram feitos em 14 estados da Federação, 76% deles em São Paulo. Número máximo de gerações encontrado foi de 3,12 (um animal), 59,7% dos animais na geração base e 24,1% na geração 1,5. O intervalo médio de gerações foi de 9,9 anos, 10,4 para garanhões e 9,3 para éguas. O Ne foi de 253 animais e os coeficientes de endogamia observado e esperado foram próximos de zero.

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Alterations in muscular enzymes of horses competing long-distance endurance rides under tropical climate

A.R. Teixeira-Neto, G. C. Ferraz, A. Moscardini … (2008)

This study tried to monitor the alterations of muscle enzymes activity - creatinokinase (CK), lactate dehydrogenase (LDH), and aspartate aminotransferase (AST) - in a group of horses that participated of 70 and 100km distance rides in five competitions of an annual endurance championship under tropical climate. Pre ride levels (U/l) were 245.13±9.84 for CK, 496.61±14.76 for LDH, and 328.95±8.65 for AST. When compared to these levels, the results revealed a significant decrease in all enzymes activities in the first moment of the rides. Peak levels, significantly different, were reached, immediately after rides by CK (413.591±50.75); 24 hours post rides by LDH (628.61±33.30); and 48 hours after rides by AST (389.89±16.96). Monitoring of recovery period revealed different behavior among enzymes activities with CK values returning to pre ride values (279.61±23.05) 24 hours post rides, while LDH and AST values returned to pre ride values (505.25±33.78 and 359.35±24.90, respectively) 72 hours post rides. These data revealed different alterations in concentration of muscular enzymes in endurance horses directly related to the duration of the effort.