- Results And Interpretation Plate 1 Is Unwashed Skin And Should Show Both Resident Normal Biota And Transient Organisms 1 (44.86 KiB) Viewed 27 times
- Results And Interpretation Plate 1 Is Unwashed Skin And Should Show Both Resident Normal Biota And Transient Organisms 2 (41.6 KiB) Viewed 27 times
- Results And Interpretation Plate 1 Is Unwashed Skin And Should Show Both Resident Normal Biota And Transient Organisms 3 (34.94 KiB) Viewed 27 times
2- hands washed with soap
3- hands washed with soap& scrub brush
4- hands washed with use of antiseptic
Results and Interpretation Plate 1 is unwashed skin and should show both resident (normal biota) and transient organisms. Compare plate 1 to the other plates (figure 26.3a, b) and see if you can determine which are the transients. Plate 2 is from skin following the use of a soap or surfactant. Compare this to plate 1. Plate 3 involves the use of a surfactant with the addition of friction from the scrub brush. Plate 4 is made after the use of an antiseptic. Did it reduce the overall number of organisms? Several bacteria, which can be normal skin biota, are shown in figure 26.3c-e. Dasnije (b) (d) (e) igure 26.3 Abundance and diversity of skin microbiota. Colonies from plate 1 (a) and plate 2 (b): These bacteria re normal biota of the skin. (c) Staphylococcus epidermidis has whitish colonies and is very commonly seen. (d) Less ommon but more dangerous is Staphylococcus aureus, which is yellowish. (e) Micrococcus luteus is found on fewer seople than Staphylococcus and has distinctly yellow colonies.
Lab result 4.3 20% MH AL
Interpretation and Questions 1. What difference did you see between the unwashed and washed skin? Between the use of a scrub brush and no scrub brush? 2. What effects did you see from the use of an antiseptic rather than soap? 3. It is estimated that students and other humans shed 1.5 million skin cells per hour. What problems might that create in the microbiology lab or surgical suite?