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１ 材料和方法１．１ 材料 ♂Ｗｉｓｔａｒ大鼠３０只（体质量２２０ｇ±２０ｇ），１０周龄～１２周龄，由同济医科大学实验动物中心提供．标准致病菌（大肠杆菌ＡＴＣＣ２５９２２），由美国菌种保藏中心提供．还原型辅酶Ⅱ（βＮＡＤＰＨ）与硝基四唑氮蓝（ＮＢＴ）
1 Materials and methods 1.1 Materials ♂ Wistar rats 30 (body weight 220g ± 20g), 10 weeks of age to 12 weeks of age, provided by Experimental Animal Center of Tongji Medical University. Standard pathogens (Escherichia coli ATCC 25922), provided by the American Type Culture Collection. Reduced coenzyme Ⅱ (β NADPH) and nitrotetrazolium nitrogen blue (NBT)