与细菌核蛋白体的50S亚基结合,抑制细菌蛋白质合成的是( )
患者,女,25岁。左侧头部着地摔伤,曾出现意识丧失。无头痛、呕吐。查体:血压118/72 mmHg,脉搏78次/min,呼吸19次/min。神志清醒,对答切题。左耳有血性液体流出。护士在对患者的护理中,可采取的护理措施应除外()
禁忌腰椎穿刺
可用棉球阻塞耳道
抬高头部,促进漏口封闭
避免用力咳嗽、打喷嚏、擤鼻涕
严禁经耳部滴药、冲洗
患者,男,32岁。尿频、尿急、尿痛,并见肉眼血尿。尿常规检查示:红细胞满视野。肾B超检查未见异常。舌质红,舌苔薄黄,脉弦数。用药宜首选
男 ,35岁 。右腹股沟肿块10年,站立时明显,平卧后消失,有时可降入阴囊,可还纳。查体 :右腹股沟肿块,手拳大小还纳腹腔,外环容3指,压迫内环后肿块不再出现。
如上述患者 ,行Halsted修补术,精索的位置是
Passage 1 It's one of our common beliefs that mice are afraid of cats. Scientists have long known that even if a mouse has never seen a cat before, it is still able to detect chemical signals released from it and run away in fear. This has always been thought to be something that is
into a mouse's brain. But now Wendy Ingram, a graduate student at the University of California, Berkeley, has challenged this common sense. She has found a way to "cure" mice of their inborn fear of cats by infecting them with a parasite, reported the science journal Nature. The parasite, called Toxoplasma gondii, might sound unfamiliar to you, but the shocking fact is that up to one-third of people around the world are infected by it. This parasite can cause different diseases among humans, especially pregnant women-it is linked to blindness and the death of unborn babies. However, the parasite's effects on mice are unique. Ingram and her team measured how mice reacted to a cat's urine (尿) before and after it was infected by the parasite. They noted that normal mice stayed far away from the urine while mice that were infected with the parasite walked freely around the test area. But that's not all. The parasite was found to be more powerful than originally thought-even after researchers cured the mice of the infection. They no longer reacted with fear to a cat's smell, which could indicate that the infection has caused a permanent change in mice's brains. Why does a parasite change a mouse's brain instead of making it sick like it does to humans? The answer lies in evolution. "It's exciting scary to know how a parasite can manipulate a mouse's brain this way," Ingram said. But she also finds it inspiring. "Typically if you have a bacterial infection, you go to a doctor and take antibiotics and the infection is cleared and you expect all the symptoms to also go away." She said, but this study has proven that wrong. "This may have huge implications for infectious disease medicine."
The experiment found that mice infected with toxoplasma gondii ______.