The Thai Journal of Veterinary Medicine


Serum cholinesterase (ChE) levels were determined in adult elephants in the summer, the rainy season and in the winter by a colorimetric method using acetylthiocholine as the substrate. The results showed that ChE levels in adult males were lower than those in adult females, in all three seasons (p < 0.05). Furthermore, the ChE level was at it’s highest in the rainy season, falling lower inมthe summer and lower again in the winter season. The difference was found in both sexes. This study is the first report on the measurement of ChE levels in elephants.

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