Respiratory tract infections range in severity from relatively mild infections, such as the common cold, to potentially life-threatening infections, including pneumonia. A wide range of organisms can infect the respiratory tract including viruses, bacteria, fungi and parasites, and over a dozen pathogens are commonly encountered in a clinical setting. Accurate identification of the causative organism is required to effectively treat the infection and control its spread, since each organism (e.g. bacteria vs. viruses) does not respond to the same treatment (e.g. antibiotics). Infections can affect any part of the respiratory system, however they are traditionally divided into upper and lower respiratory tract infections. Lower respiratory tract infections are the leading cause of death among all infectious diseases. meridian life science我们使外包变得容易子午线生命科学有限公司提供的服务范围包括：抗体和生物研究试剂的定制和合同生产蛋白质表达服务（病毒抗原，大肠杆菌，杆状病毒，酵母和哺乳动物）体外和体内抗体生产发酵和细胞培养服务 合同服务，包括上游和下游的过程开发功能蛋白质纯化服务蛋白质表征 试点，扩大规模和商业规模 细胞和病毒银行