A lab technician intern is asked to apply a 10% KOH (potassium hydroxide)solution on a sample.There are four patient samples sitting on the lab bench and he is trying to remember which sample should be treated.Which of the following four samples would require treatment with KOH?

Question

Quizplus · Accepted Answer

A skin scraping from a site suspected to be a fungal infection would require treatment with a 10% KOH solution to help visualize the fungal elements under the microscope. KOH can dissolve non-fungal elements to enhance the visibility of fungal elements. Nasopharyngeal swab for Bordetella pertussis, sputum sample from a patient with tuberculosis, and fecal sample from an individual with bloody diarrhea would not require KOH treatment.

A Lab Technician Intern Is Asked to Apply a 10