PLE Category: Microbiology

PLE-3594

Which of the following viruses possess a reverse transcriptase enzyme?

PLE-3595

A 65-year-old rich lady presented with cough, shortness of breath, and weight loss for 1 month. She had no history of smoking and was very socially active. She recalls to you that there have been numerous times that she suppresses her cough, especially during her very numerous gallant occasions, for fear of embarrassment. Work-up showed the presence of acid-fast bacilli, while imaging revealed a middle lobe infiltrate. What is the causative agent?

PLE-3596

The laboratory work-up of a gram-positive cocci showed a catalase-positive, coagulase-negative organism. Further work-up showed rampant growth around the Novobiocin antibiotic disc after 16 hours of incubation. What is the most probable identity of the isolated organism?

PLE-3597

Which of the following methods do prokaryotes employ for locomotion?

PLE-3598

Which of the following filarial worms is known for its diurnal periodicity, and therefore, should alert the physician to the timing of blood extractions for parasite detection?

PLE-3599

If a patient has a load of about 20 adult Necator americanus worms, what is the expected blood loss per day secondary to the hookworm infection?

PLE-3589

A 33-year-old male gardener comes into the clinic a few weeks after a rose thorn abraded the dorsal surface of his left thumb while gardening. He has developed a well-demarcated ulcerated lesion on the dorsal surface of his right thumb and erythematous nodular lesions on his right forearm. Which of the following antifungals is most appropriate for this patient?

PLE-3590

A 48-year-old male resident of rural Argentina came home to Manila for the holidays. During this visit, the patient was rushed to the ER after presenting with generalized edema, exertional dyspnea, and palpitations. On physical examination, you note that the apex beat is displaced to the 6th ICS LAAL, rales are heard on basal lung fields, and jugular veins are distended. You suspect a chronic phase disease caused by a parasitic infection and request blood cultures and PCR to identify infection with:

PLE-3591

A 28-year-old male, known case of AIDS, presents with severe diarrhea. Stool examination reveals acid-fast cysts. What is the infective stage in the life cycle of the etiologic organism?