A preliminary report on hepatic pigmentation in Falkland Islands sheep

Pigmentation of hepatocytes and Kupffer's cells with lipofuscin and melaninlike pigment is described. The occurrence of pigmented reticulo-endothelial cells in the lungs and lymphoid tissue was also noted. No discernible impairment of function accompanied the pigmentation.     

Insulin Sensitivity in Thoroughbred Geldings: Effect of Weight Gain,Diet, and Exercise on Insulin Sensitivity in Thoroughbred Geldings

The effects of dietary energy source, controlled weight gain, and exercise restriction on insulin sensitivity (SI) were studied in mature Thoroughbred geldings with body condition scores (BCS) of 4.3 ± 0.1. Two dietary energy sources were used, one high in starch and sugar (HS; n = 9) and one high in fat and fiber (HF; n = 7), and horses were fed 20 Mcal digestible energy (DE)/day above maintenance requirements to encourage weight gain. Using the minimal model of glucose and insulin dynamics, no differences in SI between groups were noted before initiation of treatment concentrate feeding. After dietary acclimation, SI was decreased in HS (P < 0.01) as compared with HF. After 32 weeks of controlled weight gain (90.8 kg; final BCS, 7.0 ± 0.1), SI remained lower in HS (P = 0.07) but did not change from the preweight gain value. SI in HF did not change between the start and end of weight gain. After completion of weight gain, exercise was restricted for 2 weeks, resulting in a reduction in SI in HF (P = 0.03) but no change in HS. It was concluded that dietary energy source may be more influential than weight gain on SI in the mature Thoroughbred gelding between BCS 4 and 7. The higher SI found in horses consuming the HF diet appeared to be partially dependent on some level of physical activity.     

替米考星对仔猪呼吸道感染的疗效试验

进行了替米考星对仔猪呼吸道感染的疗效试验,并与泰乐菌素、支炎净、氟苯尼考、克林霉素进行比较。替米考星治疗组仔猪死亡率、有效率、治愈率分别为5.88%、94.12%和88.23%,经统计学分析,效果显著优于对照组(P<0.01);替米考星预防组仔猪发病率、死亡率、有效率和15 d增重分别为4.76%、0、100%和(5.65±1.25)kg,经统计学分析,有效率、治愈率和相对增重显著高于对照组(P<0.01),仔猪发病率、死亡率明显低于对照组(P<0.01)。试验结果表明,替米考星对仔猪呼吸道感染疗效显著,具有临床使用和推广价值。