鼓室注射金黄色葡萄球菌致豚鼠鼓室硬化模型的建立

目的 建立鼓室硬化的动物模型,探讨鼓室硬化发生过程.方法 选择健康杂色豚鼠21只,麻醉后在无菌条件下于左耳经鼓膜注射1×108·L-1金黄色葡萄球菌液100 μl,制成慢性化脓性中耳炎模型,右耳为正常对照.术后1、3、6月分别断头处死动物,观察鼓膜和中耳粘膜的组织形态变化.结果 在造模3月及更长时间的豚鼠实验耳中出现鼓室硬化病理改变,组织中钙质沉积及纤维化程度与慢性化脓性中耳炎持续的时间呈正相关.结论 向豚鼠鼓室内注射金黄色葡萄球菌导致慢性化脓性中耳炎诱发鼓室硬化的动物模型切实可行.

Establishment of tympanosclerosis by intratympanic injection of Staphylococcosis aureus in guinea pigs

OBJECTIVE: To establish a guinea pig model of tympanosclerosis and investigate the development and progression of tympanosclerosis in the tympanic membranes and middle ear mucosa. METHODS: Twenty-one healthy guinea pigs were subjected inoculation of 1x10(8)/L Staphylococcosis aureus into the left middle ear cavities under general anaesthesia, with the right ears as the control, to establish models of chronic purulent otitis media. The animals were sacrificed by decapitation after 1, 3 and 6 months after model establishment for histological examination of the middle ear mucosa. RESULTS: The histological changes of tympanosclerosis occurred in some of the animals 3 months after model establishment, and the extent of calcium deposition and fibrosis across the mucosa were positively correlated with the duration of chronic purulent otitis media. CONCLUSION: Tympanosclerosis may occur in some guinea pigs after inoculation of Staphylococcosis aureus into the middle ear cavity, and this model can be useful for study of tympanosclerosis.