Lab Technician exam questions2022
Question:
A 78-year-old man developed endocarditis due to a
vancomycin-resistant strain of Enterococcus faecalis. What is the molecular
basis of resistance of this organism to vancomycin?
Options:
Question:
A 47-year-old woman in India is becoming blind due to
repeated infection with Chlamydia trachomatis. What is seen in the pus draining
from her eyes and stained by immunofluorescence?
Options:
(A) Elementary bodies
Question:
A new rapid diagnostic test for strep throat was
undergoing clinical trials. Among 500 culture-positive individuals with sore
throat, 500 were positive by the test. Among 500 culture-negative individuals
without sore throat, 200 were negative by the test. Describe the sensitivity
and specificity of this test.
Options:
(B) High
sensitivity; low specificity
Question:
What is the basis of serotyping of the pathogen in the
above question?
Options:
(D) M
antigens
Question:
A resident in his first week of outpatient clinic work
prescribes erythromycin for the treatment of a urinary tract infection,
presumably a simple caseof Escherichia coli. The attending physician
countermands the resident’s order and prescribes TMP– SMZ. Why is the
therapeutic choice by the attending more appropriate?
Options:
(C) Macrolides are principally secreted in the feces
Question:
What are the virulence factors of the organism in the
above question that enable it to adhere to and kill ciliated respiratory epithelial
cells?
Options:
DHA LICENSING PROCESS
Question:
A 35-year-old male became ill with watery diarrhea due to
a bacterial infection while on a trip to South America. Which of the following
is the key event that promotes the development of watery diarrhea?
Options:
(B) Increase in the intestinal epithelial cell levels of
cAMP
Question:
A 47-year-old male is diagnosed with peptic ulcer
disease. Treatment includes antibiotics for infection of the stomach with
Helicobacter pylori. Which enzyme is secreted by this organism and enables it
to survive in the acid environment of the stomach?
Options:
(D) Urease
Question:
A 3-year-old girl develops a wound infection on her hand
following a cat bite. Culture of wound exudate on blood agar grew a
Gram-negative coccobacillus that is a normal flora of the cat oropharynx. What
is the most likely etiologic agent?
Options:
(D) Pasteurella multocida
Question:
An outbreak of pneumonic plague occurs in the Democratic
Republic of the Congo killing over half of the affected individuals. How is
this form of transmitted?
Options:
(D) Inhalation of aerosolized bacteria
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