Oh! I DO agree on that. As far as I go with BSC I know you can use Biological Indicators (BI) for BSC. Usually the vial equivalent is used when you decontaminate your BSC and thereafter you do your Surface, Vaiable and Non-Viable air samples on a monthly basis. (Be aware I worked for 4 years in Clinical Micro and 2 years in Environmental Microbiology, doing QA for clean rooms, BSC and what not). I am just trying to make sure there is no other way that may escape to me that we may be able to do a BI as my boss is requesting. Then again - it is my boss requesting it so I need to accumulate ALL the info that proves it is NOT doable in a safety manner. What I also proposed (as this is based on some positive pre and post testing from the past that I am 100% sure it was because the patient him/herself was infected) is to include the use of sleeves over the lab coats and in any case settle plates during processing. Maybe 2 people per hood as a stress test.