PLE Category: Microbiology

PLE-3658

A 25-year-old female has signs and symptoms consistent with genital warts. What would have been the best approach to prevent this disease?

PLE-3659

A 25-year-old female presents with dysuria, as well as urinary urgency and frequency. A urine dipstick test is positive for both leukocyte esterase and nitrites. What genus or family is noted for the production of nitrites?

PLE-3654

A 24-year-old medical student on the Caribbean island of Dominica presents at the Student Health Clinic complaining of an increasingly severe headache and back and bone pain. Yesterday she was nauseated and vomited several times during the night. She has a 39.5°C/103°F fever, which appeared suddenly, and a generalized rash that blanches under pressure. She had been hiking in the rainforest 1 week earlier and was particularly bothered by mosquitoes at that time. The most likely infectious agent causing her symptoms is

PLE-3655

A 24-year-old resident presents to the emergency department with severe eye pain. She has not been home for 2 days and has had the current pair of contacts continuously in her eyes for 6 weeks. What major protective mechanism of the eye could not keep up with such contaminated contacts, resulting in infection?

PLE-3656

A 24-year-old who just returned from a 2-week missionary trip to rural Haiti presents with a 2-day history of watery diarrhea. What is most likely causing his problem?

PLE-3650

A 23-year-old woman presents with symptoms of vaginitis, including a yellowish discharge. She claims to have not been sexually active for 18 months. When KOH is added to the discharge, a fishy odor appears. She is most likely infected with

PLE-3651

A 23-year-old woman presents with vaginal itching and erythema as well as a discharge which is thick and white. External erythema is also present with discrete pinpoint lesions off the edge. The discharge pH is 4.7 (normal). Amine test is negative as is the genetic probe test for Neisseria. What is the most likely cause?

PLE-3652

A 24-year-old man who has recently started doing intravenous drugs presents to the emergency department with fever and evidence of mild tricuspid valve insufficiency. As far as he knows, he had no previous damage to his heart. What is the most likely causative agent?

PLE-3653

A 24-year-old man who has recently started working on a sheep farm in Nova Scotia develops pneumonia shortly after helping with lambing. His cough produces little sputum, and a saline-induced sputum sample shows no predominant organism either with Gram stain or with acid-fast stain. It is established that he acquired the pneumonia from parturition products from the sheep. Which agent is most likely to be the cause of his pneumonia?