Normal Microbiota and the Host Transient microbiota may be present for days,weeks, or months Normal microbiota permanently colonize the host Symbiosis is the relationship between normal microbiota and the host • Transient microbiota may be present for days, weeks, or months • Normal microbiota permanently colonize the host • Symbiosis is the relationship between normal microbiota and the host Normal Microbiota and the Host