内容正文:
Reading and writing one, read the passage below and find out what kinds of plague are caused by the bacterium your cinna pestis. The black death IT came to europe . by ship in the year thirteen forty seven. and within just a few short years, IT killed up to two hundred million people. living up to sixty percent of the population of europe dead. They called IT the black death because the patient skin would turn black where IT had died. However, the medical term for IT is the biblical plague because its victims developed as of swelling called buboes. We now know that this plague was caused by the bacterium. your senior pestis. This same bacterium can cause two other forms of the plague. The september mic plague, which affects the blood in, is spread by insect bites. And the neumann plague, which affects the lungs and is spread by coffin and sneezing before anti biotics entered into use in the nineties, all forms of the plague were usually fatal. making IT one of the . most fear diseases on earth. Fortunately, there have been no large outbreaks for more than one hundred years.