TB infections are often diagnosed by collecting sputum samples from the patient’s lungs and staining the cells to view under the microscope (Figure 5). Based on the microscopic image, what is the morphology of M. tuberculosis? Figure 5: Microscopic image of M. tuberculosis in a sputum sample. M. tuberculosis cells are stained pink and labeled with arrows.
Read DetailsDescribe how VapBC expression is regulated on a molecular level. (6 sentences max) For full credit be sure to: Name and describe the function of all proteins involved in the regulation. Describe what is happening on a molecular level when the genes are transcribed. Describe what is happening on a molecular level when the genes are not transcribed.
Read DetailsTB can also be diagnosed through a skin test. During a TB skin test, patients are exposed to tuberculin (a purified protein from M. tuberculosis) via an injection on the inner forearm. The sight of injection is observed after 48-72 hours. If the patient has been infected with M. tuberculosis, a large raised hard area of swelling will appear (Figure 6). This is the result of… Choose all that apply. Figure 6: TB skin test. Inoculation method (left) and positive result (right).
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