评注(闫之春,美国谷物协会):Premium Standard Farms公司是美国的一家大型养猪企业,拥有生产母猪近20万头。这篇短文叙述的是几年前该公司的兽医和生产负责人在猪群繁殖与呼吸综合征(蓝耳病)阳性时遇到的烦恼,以及决策进行疾病净化的过...评注(闫之春,美国谷物协会):Premium Standard Farms公司是美国的一家大型养猪企业,拥有生产母猪近20万头。这篇短文叙述的是几年前该公司的兽医和生产负责人在猪群繁殖与呼吸综合征(蓝耳病)阳性时遇到的烦恼,以及决策进行疾病净化的过程。这与当前中国不少大型养猪企业的情况何其相似!本文简短的几条描述,为大型养猪场疾病净化决策时需要考虑的问题提供了很好的思路。净化前后的生产成绩对比说明,即便是一两年的净化状态也是值得的。展开更多
During a toxicological test using diisopropyl methylphosphonate (DIMP) on mallards, an anaesthesia-like response was noted after oral dosing. In order to further elucidate these effects, arterial blood pressures were ...During a toxicological test using diisopropyl methylphosphonate (DIMP) on mallards, an anaesthesia-like response was noted after oral dosing. In order to further elucidate these effects, arterial blood pressures were determined both pre-and post-dosing on adit male and female mallards by cannulation of the left carotid artery. A significant decrease in systolic, diastolic, and mean blood pressure was noted after the oral administration of DIMP. There was no significant difference in response between males and females. During the first 30 min after dosing, systolic pressure fell from an average of 158 mmHg, to 94 mmHg, diastolic decreased from 127 mmHg to 63 mmHg, and mean blood pressure dropped from 138 mmHg to 75 mmHg. However, there was no significant effect on pulse pressure, heart rate, or respiratory rate. These results are compared to physiological data cited in the literature for various CNS-acting drugs on mallards.展开更多
文摘评注(闫之春,美国谷物协会):Premium Standard Farms公司是美国的一家大型养猪企业,拥有生产母猪近20万头。这篇短文叙述的是几年前该公司的兽医和生产负责人在猪群繁殖与呼吸综合征(蓝耳病)阳性时遇到的烦恼,以及决策进行疾病净化的过程。这与当前中国不少大型养猪企业的情况何其相似!本文简短的几条描述,为大型养猪场疾病净化决策时需要考虑的问题提供了很好的思路。净化前后的生产成绩对比说明,即便是一两年的净化状态也是值得的。
文摘During a toxicological test using diisopropyl methylphosphonate (DIMP) on mallards, an anaesthesia-like response was noted after oral dosing. In order to further elucidate these effects, arterial blood pressures were determined both pre-and post-dosing on adit male and female mallards by cannulation of the left carotid artery. A significant decrease in systolic, diastolic, and mean blood pressure was noted after the oral administration of DIMP. There was no significant difference in response between males and females. During the first 30 min after dosing, systolic pressure fell from an average of 158 mmHg, to 94 mmHg, diastolic decreased from 127 mmHg to 63 mmHg, and mean blood pressure dropped from 138 mmHg to 75 mmHg. However, there was no significant effect on pulse pressure, heart rate, or respiratory rate. These results are compared to physiological data cited in the literature for various CNS-acting drugs on mallards.
