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Environment, respiratory disease, and performance of pigs in three Saskatchewan grower-finisher barns 总被引:1,自引:0,他引:1 下载免费PDF全文
Bauck SW Rhodes CS Barber EM 《The Canadian veterinary journal. La revue veterinaire canadienne》1990,31(7):506-513
A microcomputer-based environmental monitoring system was used to monitor temperature, humidity, and ventilation rate continuously in three commercial grower-finisher swine barns in Saskatchewan. During the monitoring period, a group of pigs in each barn was examined for growth rate, amount of lung affected with pneumonia, and degree of atrophic rhinitis. In addition, the total bacterial colony forming particle count within the airspace of each barn was measured once each week.
Significant differences existed among barns for daily maximum and minimum temperature, relative humidity, ventilation rate, and average bacterial colony forming particle counts. There was no difference among farms in the average percentage of lung affected with pneumonia, average snout atrophy score, or growth rate of the test animals.
On one farm, there was a significant positive correlation between snout score and percentage of lung affected with pneumonia. On another farm, there was a significant negative correlation between percentage of lung affected with pneumonia and growth rate.
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SW PAGE 《Australian veterinary journal》1991,68(7):224-225
Diethylstilboestrol is a non-steroidal orally active oestrogen that in the past has been widely used in a variety of conditions in both medical and veterinary fields. In recognition of potential systemic availability to man of DES in the tissues of treated food-producing animals, together with an understanding of the potential teratogenic and carcinogenic toxicity of DES in man, the veterinary use of DES has been restricted to oral use in small animals only. Use of DES is prohibited in all food-producing animals. 相似文献
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