Lab Technician Exams

Lab Technician Exams in Middle East 2022

Question:1

A major virulence factor of the etiologic agent in the above question is a toxin. What is the role of this toxin in disease production?

Options:

(A) Acts as a superantigen thereby inducing inflammation

(B) Blocks protein synthesis causing intestinal cell death

(C) Increases cAMP concentration within intestinal cells

(D) Increases cGMP concentration within intestinal cells

Answer:

(B) Blocks protein synthesis causing intestinal cell death


Question:2

What is the proper course of action the physicians should take with regard to the management of the outbreak described in the above case?

Options:

(A) Avoid antibiotics and allow the symptoms to abate naturally

(B) Avoid contact with animal reservoirs to prevent reintroduction of the organism into the community

(C) Prescribe antimotility drugs to reduce transmission

(D) Treat affected patients with antibiotics

Answer:

(D) Treat affected patients with antibiotics


Question:3

During the summer in western Massachusetts, a teenager complains of aching muscles and joints and mild fever. He notices a rash on the side of his upper leg (shown in the photograph), which prompts his mother to take him to the clinic. What is the most likely etiology and route of transmission?

Options:

(A) Borrelia burgdorferi/tick bite

(B) Ehrlichia chaffeensis/tick bite

(C) Francisella tularensis/deer fly bite

(D) Leptospira interrogans/rodent bite

Answer:

(A) Borrelia burgdorferi/tick bite



Question:4

How would the physician determine the diagnosis in the above case?

Options:

(A) CBC assessment and visualization of the microbe from the lesion by dark field microscopy

(B) History and clinical presentation of the patient plus elevated liver function tests

(C) History and clinical presentation of the patient alone

(D) Culture of the organism from blood and synovial fluid

Answer:

(C) History and clinical presentation of the patient alone

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Question:5

With regard to the above case, what is the drug of choice?

Options:

(A) Ceftriaxone

(B) Chloramphenicol

(C) Doxycycline

(D) Metronidazole

Answer:

(C) Doxycycline


Question:6

A 7-year-old female child is taken to an urgent care facility because of fever and periodic incontinence. The physician suspects a urinary tract infection. What is the most likely etiology of this child’s infection?

Options:

(A) Escherichia coli

(B) Proteus mirabilis

(C) Pseudomonas aeruginosa

(D) Staphylococcus saprophyticus

Answer:

(A) Escherichia coli


dha exam

Question:7

With reference to the above case, what is the most likely source and mode of transmission for this urinary bacterial isolate?

Options:

(A) Contamination with perianal and bowel flora

(B) Hematogenous spread from the kidneys

(C) Inadvertent inoculation with commensal organisms on skin

(D) Transmission from an uncircumcised sexual partner

Answer:

(A) Contamination with perianal and bowel flora


Question:8

A 78-year-old hospitalized male with an indwelling catheter develops a new onset of fever. The urine sample has an alkaline pH. The bacterium isolated from the urine is a urease-producing, highly motile, Gram-negative bacillus. What isthe most likely complication of thisinfection?

Options:

(A) Deposition of antigen–antibody complexes in the glomeruli

(B) Development of epididymitis

(C) Development of prostatitis

(D) Formation of struvite kidney stones

Answer:

(D) Formation of struvite kidney stones


Question:9

What is the pathogen most likely involved in the above case?

Options:

(A) Escherichia coli

(B) Proteus mirabilis

(C) Pseudomonas aeruginosa

(D) Staphylococcus saprophyticus

Answer:

(B) Proteus mirabilis



Question:10

An 85-year-old male nursing home patient with a history of alcoholism suddenly developed a flu-like illness. He complained of chills and fever and had frequent coughing spells productive of thick, bloody sputum. The attending physician diagnosed bronchopneumonia and prescribed antibiotics, but regrettably the patient died within a week. What is the most likely cause of the patient’s pneumonia?

Options:

(A) Haemophilus infiuenzae

(B) Klebsiella pneumoniae

(C) Legionella pneumophila

(D) Mycoplasma pneumoniae

Answer:

(B) Klebsiella pneumonia




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