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PATHOPHYSIOLOGICAL STUDY OF BOVINE TEAT,CANAL AND CISTERN

牛乳头、运河和水池的病理生理学研究

基本信息

批准号：
06660406
负责人：
HAMANA Katsumi
金额：
$ 1.34万
依托单位：
KAGOSHIMA UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1994
资助国家：
日本
起止时间：
1994 至 1995
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06660406/
关键词：
Dairy Cattle Teat Teat Canal Teat Cistern Bacteria Mastitis Teat measurement Ultrasonography 病理組織学検査乳頭乳管洞乳頭部

项目摘要

Most commonly, mastitis begins as a result of penetration of bacteria through the teat canal into the interior of the gland. Therefore, morphorogical differences of the teat shoud be related to the infection. In this research, teat measurements and ultrasonic tomography were applied to evaluate the teat morphology related to milk quality and bacteria.Teat-base and -apex diameter, -length, teat canal diameter and -length and teat gradient were measured. At the same time, milk quality (electronicconductivity, CMT and somatic cell counts) and bacteria were examined. These parameters were compared between the positive and negative groups divided from the result of milk mastitis tests and bacteriological examination.The teats of the same materials were examined on ultrasonography by the water bath dipping method. They were then compared with macroscopic and histopathologic findings.Teat gradient and teat canal diameter were significantly larger in the positive group than in the negative group. The teat canal diameter of the positive group in bacterial examination was significantly larger than that in the negative group. These results suggest that the teat with larger teat grandient and/or teat canal diameter is susceptible to mastitis.The ultrasonograhic images of normal teats were recorded that the epidermis of teat wall, intima and rosette of Furstenberg appeared as hyperecogenic, the muscle layr as hypoechogenic and the teat sinus and teat canal as anechogenic. Abnormal findings were obtained as follows, obstruction of teat sinus, hypertrophy of intima, abscess and polyp. These abnormalities were confirmed by morphological examination. In the lactating cows, some abnormal teats were found as diverticulum, stenosis and malformation.Teat measurements and ultrasonography will be a useful methods for preventing mastitis.

最常见的情况是，乳腺炎是由于细菌通过乳头管渗透到腺体内部而引起的。因此，乳头的形态差异可能与感染有关。本研究应用乳头测量技术和超声断层扫描技术对奶牛乳头形态进行了研究，测量了乳头基径、乳头顶径、乳头长度、乳头管径、乳头管长度和乳头倾斜度，并对乳头形态与牛奶品质和细菌的关系进行了分析。同时对乳品质（电导率、CMT和体细胞数）和细菌进行了检测.根据乳房炎试验结果和细菌学检查结果划分阳性组和阴性组，并对同一材料的乳头进行超声水浴法检查。阳性组乳头倾斜度和乳头管直径明显大于阴性组。细菌检查阳性组乳头管直径明显大于阴性组。正常乳头的声像图表现为乳头壁表皮、内膜和Furstenberg花环呈高回声，肌层呈低回声，乳头窦和乳头管呈无回声。发现乳头窦阻塞、内膜肥厚、脓肿和息肉。通过形态学检查证实了这些异常。在泌乳奶牛中发现乳头憩室、乳头狭窄、乳头畸形等异常情况，乳头测量和超声检查是预防乳腺炎的有效方法。