Abstract

OSORIO, José Henry; RAMIREZ, Felipe  and  PEREZ, Jorge Enrique. COMPARISON OF THYROID PROFILE IN Equus ferus caballus (MAMMALIA: PERISSODACTYLA) BY GENDER AND AGE. Bol. Cient. Mus. Hist. Nat. Univ. Caldas [online]. 2013, vol.17, n.2, pp.121-126. ISSN 0123-3068.

Objective: To compare and analyze the correlation between serum thyroid concentrations of 6 groups of horses (young females vs. young males; adult females vs. adult males; young females vs. adult females; young males vs. adult males; females vs. males, and young vs. adults). Materials and Methods: Blood samples were obtained from 99 horses in the fasting state, differentiated by gender and age (50 horses under two years: 25 females and 25 males, and 49 horses over two years: 25 females and 24 males). Levels of THS and free T4 were measured by enzymatic immunoassay. Results: For the FT4 by age group: significant difference for young vs. adults was found, with a p-value lower than 0.05 equal to 0.005, with 0.74 mg/dl and 0.59 mg/dl average ranks for young and adults respectively, with a confidence level of 95%. Similarly, statistically significant difference for young females vs. adult females was found in the FT4 fraction ranging from 0.74 mg/dl and 0.56 mg/dl respectively, with a p-value lower than 0.05 equal to 0.01. For the other groups, the differences in FT4 and TSH values ?? were not significant (P ≥ 0.05). Conclusions: The results suggest that young females present higher FT4 serum levels.

Keywords : thyroid; metabolism; horses.

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