Once patients are identified as meeting criteria for enrollment, the research assistant will be notified at which time the frontline staff will retrieved a premade package for the sample collection. Using a sterile catheter and a clean technique, two separate tracheal aspirates will be acquired from the subject and placed in their specialized clinical or research sputum trap. To acquire two samples, sterile saline irrigation will be permitted and if needed the splitting of the specimen into the separated collection traps. Concurrently a tube of blood as well as one set of blood cultures from an established indwelling access (either central line, arterial line or peripheral blood draw) will be drawn. Clinical lab labels will be placed on one sputum sample and the set of blood cultures and sent routinely to the microbiology lab. The research lab bag will contain the second sputum sample and blood tube labelled with patient identification number and the time of sample collection. To ensure the ability of culturing for anaerobic bacteria in the research laboratory, an anaerobic pack will be placed in the research sample bag with the sputum sample and blood tube as well as a damp paper towel. The sample bag will then be voided of air and sealed. The research bag is labelled as well with patient identification number and date/time of sample collection which is then sent to the clinical microbiology lab. The clinical laboratory is then notified of the incoming research sample which will need to be transported to the research laboratory via established laboratory transportation protocols. Once the sample is sent, the co-investigator is notified again and clinical data (leukocytes, hemoglobin, platelets, arterial blood gases, temperature, Glasgow coma scale, oxygen requirements, high/low respiratory rate, heart rate, and blood pressure) for the day of collection and for the following six days including complete ICU antibiotic usage, extubation date and final patient outcome after 30 days can be collected and entered into a secure RedCap database. Communication to the research laboratory will be the responsibility of the co-investigator to ensure samples have arrived and can be plated in the time set out within the study protocol. Transportation of the samples are available from 0700 until 2000 Monday through Sunday so identification of potential enrollment , and collection of samples will be encouraged during these times to ensure successful arrival and processing of samples at the research laboratory.