Davies P R, Morrow W E, Jones F T, Deen J, Fedorka-Cray P J, Gray J T
Department of Food Animal and Equine Medicine, College of Veterinary Medicine, North Carolina State University, Raleigh 27606, USA.
J Am Vet Med Assoc. 1997 Feb 1;210(3):386-9.
To compare prevalence of fecal shedding of Salmonella organisms and serum antibodies to Salmonella sp in market-age pigs housed in barns with partially slotted floors or solid floors with open-flush gutters.
Cross-sectional study of prevalence.
Finishing-age pigs deemed by the producer to be within 1 month of slaughter.
Fecal and serum samples were obtained from a group of 121 pigs housed in a barn with solid floors (31 fecal samples, 30 serum samples) and from a group of about 400 pigs housed on partially slotted floors (57 fecal samples, 64 serum samples). Fecal samples were submitted for bacteriologic culture to detect Salmonella organisms, and serum samples were tested for antibodies by use of ELISA.
Salmonella agona was isolated from 26 of 31 (84%) fecal samples obtained from pigs housed in the open-flush gutter barn, compared with 5 of 57 (9%) fecal samples from pigs in the barn with slotted floors. Median value for optical density was higher for serum samples from pigs housed in the open-flush gutter barn.
Housing of finishing-age swine in barns with open-flush gutters may contribute to increased shedding of Salmonella sp. Analysis of our observations indicated that repeated exposure to infected feces is important in prolonging fecal shedding by swine.
比较饲养在部分漏缝地板猪舍或带开放式冲洗沟的实心地板猪舍中的上市猪沙门氏菌粪便排菌率及血清抗沙门氏菌抗体。
患病率横断面研究。
生产商认为在屠宰前1个月内的育肥猪。
从一组饲养在实心地板猪舍的121头猪（31份粪便样本，30份血清样本）和一组饲养在部分漏缝地板猪舍的约400头猪（57份粪便样本，64份血清样本）中采集粪便和血清样本。粪便样本送检进行细菌培养以检测沙门氏菌，血清样本采用ELISA法检测抗体。
从带开放式冲洗沟猪舍的猪的31份粪便样本中的26份（84%）分离出阿哥纳沙门氏菌，相比之下，漏缝地板猪舍的猪的57份粪便样本中的5份（9%）分离出该菌。带开放式冲洗沟猪舍的猪的血清样本光密度中位数更高。
在带开放式冲洗沟的猪舍中饲养育肥猪可能会导致沙门氏菌排菌增加。对我们观察结果的分析表明，反复接触感染粪便对于延长猪的粪便排菌很重要。
