All Subjects Medicine Surgery Pathology Anatomy Pharmacology Social & Preventive Medicine Microbiology Gynaecology & Obstetrics Dental Physiology Biochemistry Pediatrics
Showing 188245 questions
Sort:
117103 Microbiology

A clinical laboratory performs real-time PCR for detection of MRSA in the area where specimens are plated. The supervisor discovers that the last 50 specimens tested were positive. However, companion cultures were positive for only 15 of the specimens. What is the most likely reason for this discrepancy?

AReal-time PCR is more sensitive than culture
BReal-time PCR is more specific than culture
CThe PCR instrument needs to be calibrated
DThe PCR workstation has been contaminated with MRSA DNA
Microbiology
View Explanation →
117108 Medicine

An agitated and nervous 24-year-old woman has had severe wheezing and shortness of breath for 2 days. After receiving oxygen, steroids, and salbutamol (Ventolin) in the emergency room, her breathing improves. She is still wheezing and now feels tremulous and anxious with a pulse of 110/min and respirations 30/min. Arterial blood gases on oxygen reveal a pH of 7.40, PO2 340 mm Hg, PCO2 40 mm Hg, and bicarbonate of 24 mEq/L. She is hospitalized for further treatment. Which of the following treatments or medications should be avoided in her?

Atheophylline
Bsedatives
Ccorticosteroids
Dsympathomimetic amines
Medicine
View Explanation →