Lab Technician Prometric 2022
Question:1
A bacterium, cultured on MacConkey agar (shown in the
photograph), was isolated from sputum and blood of the patient in the above
case. What is the primary function of the pathogenicity determinant depicted in
this photo?
Options:
Question:2
A bacterium was isolated from the central nervous sys-
tem of a newborn that died of meningitis. The vagina of the mother was
colonized with the same isolate as determined by the capsular antigen. The
microbe grew well on standard blood and MacConkey agar at ambi- ent atmospheric
conditions. What is the most likely etiologic agent?
Options:
Answer:
(A) Escherichia coli K1
Question:3
An adult tourist visiting a remote area of Guatemala
developed fever, prostration, malaise, dysentery, and dehydration. Based on
current epidemiologic data of the region, a local physician reported that the
causative agent was probably a diarrheogenic strain of Escherichia coli and
did not prescribe antibiotic therapy. Presuming the Guatemalan doctor to be
correct, which type of viru- lent E. coli is most consistent with this clinical
picture?
Options:
Answer:
(E) Enterotoxigenic E. coli (ETEC)
Question:4
A 40-year-old man presented with a rubeola-like rash on
the extremities, chills, fever, myalgia, and malaise 5 days after returning
from a June fishing trip in Arkansas. A history of tick bites is noted and
Rocky Mountain spotted fever (RMSF) is suspected. What is the etiologic agent
of this disease?
Options:
Answer:
(D) Rickettsia rickettsii
Question:5
With reference to the above question, which antimi-
crobial agent should be employed?
Options:
Answer:
(C) Doxycycline
Question:6
A previously healthy woman became nauseated and vomits 12
hours after eating home-pickled eggs. Within 24 hours, she developed a diffuse
flaccid paralysis and respiratory impairment, necessitating hospitalization and
mechanical ventilation. Other symptoms included diplopia and dysarthria. What
is the most likely diagnosis?
Options:
Answer:
(A) Botulism
Question:7
A 52-year-old woman presented with indigestion and
heartburn occurring shortly after meals which she treated with over-the-counter
antacids. Physical examination revealed mild epigastric tenderness. A
radiolabeled-urea breath test is positive. What is the most probable etiologic
agent?
Options:
(C) Helicobacter pylori
DHA LICENSING PROCESS
Question:8
What cancer is the patient in the above case at risk for
as a consequence of this infection?
Options:
Answer:
(B) Gastric adenocarcinoma
Question:9
What virulence factor of the organism may be associ- ated
with induction of this cancer?
Options:
Answer:
(A) cagA
Question:10
Hemorrhagic colitis, hemolytic uremic syndrome, and
thrombotic thrombocytopenic purpura are clinical manifestations of which
bacterial species?
Options:
Answer:
(B) Escherichia coli O157:H7
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