But for nucleic acid testing laboratories last medical waste autoclave disinfection, especially the placement of autoclave sterilization kettle is still very controversial. It is understood that many laboratories of the autoclave is still in accordance with the requirements of the CDC experts placed in the sample preparation area; some laboratories in accordance with the requirements of the test experts to place the autoclave separately. High-pressure steam sterilizer placed in the sample preparation area is appropriate, we did a simple test to prove that high-pressure steam sterilizer placed in the sample preparation area does require discretion.