Augustine P C, Denbow D M
U.S. Department of Agriculture, Livestock and Poultry Science Institute, Beltsville, Maryland 20705.
Poult Sci. 1991 Apr;70(4):785-9. doi: 10.3382/ps.0700785.
Plasma epinephrine, norepinephrine, and glucose levels were measured in 3- to 4-wk-old turkey poults that had been infected with the coccidium Eimeria adenoeides. When measured at 6 days postinoculation, the acute stage of the infection, the epinephrine and norepinephrine levels of the infected poults showed a dose-dependent increase over levels in controls, with poults that were most heavily infected having the highest levels. The catecholamines appeared to show a classic stress-elicited response: this response increases with time to high levels during the acute stage of the infection, and then returns to levels approximately the same as those of the controls as the poults recover from the infection. Anorexia, or feed restriction, appeared to be primarily responsible for the increase in norepinephrine. However, epinephrine levels in the infected poults were significantly higher than in their pair-fed, uninfected counterparts, indicating that factors other than reduced feed consumption contributed to the increase. The data indicate that plasma catecholamines are increased during coccidial infection. As pressor compounds, they may contribute to the previously observed changes in blood pressure and heart function in infected poults.
对感染了腺艾美耳球虫的3至4周龄小火鸡的血浆肾上腺素、去甲肾上腺素和葡萄糖水平进行了测量。在接种后6天（感染的急性期）进行测量时，感染小火鸡的肾上腺素和去甲肾上腺素水平相对于对照组呈剂量依赖性增加，感染最严重的小火鸡水平最高。儿茶酚胺似乎表现出典型的应激引发反应：在感染急性期，这种反应随时间增加至高水平，然后随着小火鸡从感染中恢复，又回到与对照组大致相同的水平。厌食或饲料限制似乎是去甲肾上腺素增加的主要原因。然而，感染小火鸡的肾上腺素水平显著高于成对饲养的未感染对照小火鸡，这表明除了饲料消耗减少之外，其他因素也导致了肾上腺素水平的升高。数据表明，球虫感染期间血浆儿茶酚胺会增加。作为升压化合物，它们可能是之前观察到的感染小火鸡血压和心脏功能变化的原因。
