Macri N P, Porter R E, Holt P S
Purdue University, Animal Disease Diagnostic Laboratory, West Lafayette, Indiana 47907-1175, USA.
Avian Dis. 1997 Jan-Mar;41(1):117-24.
This study describes and compares early inflammation caused by Salmonella enteritidis in molted and nonmolted hens. Adult white leghorn chickens were orally infected with Salmonella enteritidis 4 days after feed removal. At 2, 4, 8, 10, 24, 48, 72, and 96 hr after infection, the hens were euthanatized, and the duodenum, jejunum, ileum, cecum, and colon were evaluated by light microscopy. Two trials were conducted, and in both trials inflammation occurred more frequently and was significantly greater in the cecum and colon of molted-infected hens compared with nonmolted-infected hens beginning at 8 hr after infection. In one trial, inflammation was more severe in the ileum of molted-infected hens compared with nonmolted-infected hens. Results indicated that molting by feed deprivation shortened the time of onset and increased the severity of acute intestinal inflammation caused by Salmonella enteritidis.
本研究描述并比较了肠炎沙门氏菌在换羽母鸡和未换羽母鸡中引发的早期炎症。成年白来航鸡在停喂4天后经口感染肠炎沙门氏菌。感染后2、4、8、10、24、48、72和96小时，对母鸡实施安乐死，并通过光学显微镜对十二指肠、空肠、回肠、盲肠和结肠进行评估。进行了两项试验，在两项试验中，与未换羽感染母鸡相比，换羽感染母鸡的盲肠和结肠从感染后8小时开始，炎症出现得更频繁且明显更严重。在一项试验中，换羽感染母鸡的回肠炎症比未换羽感染母鸡更严重。结果表明，通过停喂进行换羽缩短了由肠炎沙门氏菌引起的急性肠道炎症的发病时间并增加了其严重程度。
