Microbiota Changes in Acute Myeloid Leukemia Patients Undergoing Intensive Chemotherapy

Inclusion Criteria: * Adults (ages 18 - 99 years) undergoing inpatient intensive chemotherapy for newly diagnosed, refractory, or relapsed AML. Patients may or may not have been exposed to any type of therapy before. * Any intensive chemotherapy regimen defined as a planned \~4 week inpatient stay. Chemotherapy may be delivered for any number of days and on any schedule. Patients may be discharged from the hospital sooner than 4 weeks if the treating physician choose so, but the expectation at the initiation of chemotherapy must be \~4 weeks of inpatient stay, as is typical. * Able to provide written voluntary consent before performance of any study related procedure.