BIOD 171 Microbiology Exam 5 Portage learning 2024

Define the concept of universal precautions (short answer) Universal precautions means any and all samples, whether known or unknown, are to be treated as potentially hazardous (or pathogenic) materials 2. List at lease 3 observations a researcher would be sure to note while assessing and unknown microbial sample (short answer) Need to note: 1. Size and shape 2. Any observable motility 3. Gram status (positive or negative) 3. While observing an unknown sample of limited amounts, a researcher must determine the following observations: 1) the presence of any motility and 2) its Gram status using the same sample- the liquid sample cannot be divided. Which would you determine first and why? (short answer) You must determine motility before determining Gram status. Motility requires a wet mount, while gram staining requires heat fixing the sample. If one were to begin with the gram stain, the heat fixation process would kill the organism, making any observations regarding motility impossible. The correct approach would be to place the liquid culture on a glass slide and de