MCQs Mock Test for Lab Technicians and Technologists: Chapter 33

Varicella-zoster virus and herpes simplex virus share many characteristics. Which one of the following characteristics is NOT shared?

A 32-year-old man who recently visited Nepal on business presents to the emergency department with profuse watery diarrhea flecked with mucus, and severe dehydration. Which of the following correctly describes the causal agent?

Each of the following statements concerning exotoxins is correct EXCEPT:

All of the following is responsible for the genetic diversity of Influenza A virus EXCEPT

A 34-year-old woman presents to her physician with complaints of midepigastric pain. She describes the pain as moderate, occasionally waking her at night, and improving immediately following meals. A urease breath test was positive. Which of the following correctly describes the causal agent?

A 4-year-old boy presents to his pediatrician with intense perianal itching. His mother explains that the child has also been extremely irritable during the day and has not been sleeping well at night. Eggs with a flattened side were identified by the laboratory technician from a piece of scotch tape brought in by the parent. Infection with which of the following organisms is most likely?

Influenza virus contains hemagglutinin and neuraminidase. What does these represent?

Each of the following parasites passes through the lung during human infection EXCEPT:

Each of the following statements concerning Ascaris lumbricoides is correct EXCEPT:

A group of 6 college students undertake to climb Mt. Rainier outside Seattle on their spring break. They pack food and camping provisions except for water, which they obtain from the many fresh water mountain streams that arise at the summit. The adventure takes a little over a week to accomplish, and all return safely in good spirits to their classes the following week. Within the first week after their return, 5 of the 6 students report to the infirmary with profuse diarrhea and tenesmus. Each affected student experiences weakness and weight loss, and stool samples submitted to the lab are yellow, greasy, and foul smelling. What attribute of this parasite imparts its pathogenicity?

Internationally accepted naming convention is used for the nomenclature of Influenza Virus. WHO has reported the outbreak of A/duck/X/Y/Z (H1N1) influenza virus? What does X denotes in this nomenclature?

Five days ago a 65-year-old woman with a lower urinary tract infection began taking ampicillin. She now has a fever and severe diarrhea. Of the organisms listed, which one is MOST likely to be the cause of the diarrhea?

Which of the following statements concerning antigenic drift in influenza viruses is correct?

Each of the following statements concerning gram-negative rods is correct EXCEPT:

A 24-year-old primiparous woman in her eighth month of gestation develops a positive IgM titer to Toxoplasma gondii for the first time. She should be advised by her physician that

Herpes simplex virus type 1 (HSV-1) is distinct from HSV-2 in several different ways. Which one of the following is the LEAST accurate statement?

Which of the following statements reflects the pathogenesis of influenza virus?

Which one of the following is the BEST explanation for the selective action of acyclovir (acycloguanosine) in herpes simplex virus (HSV)-infected cells?

Children at day care centers in the United States have a high rate of infection with which one of the following?

An infant presents to the emergency department due to difficulty breathing, constipation, and anorexia. Upon examination, the physician notes flaccid paralysis. A toxin screen of the stool identified the agent. What is the mechanism of action of the toxin?

The scientist who discovered M. tuberculosis was:

Each of the following statements concerning Strongyloides stercoralis is correct EXCEPT:

MDR TB is defined as resistance to

Which one of the following statements about genital herpes is LEAST accurate?

Each of the following statements concerning Schistosoma haematobium is correct EXCEPT:

Endotoxin of which gram negative bacteria have no part in pathogenesis of disease:

Tubercular Granulomas are made up of

Herpes simplex virus and cytomegalovirus share many features. Which one of the following features is LEAST likely to be shared?

The mother of a 4-year-old child notes that her child is sleeping poorly and scratching his anal area. You suspect the child may have pinworms. Which one of the following is the BEST method to make that diagnosis?

An HIV-positive patient with a CD4+ count of 47 presents with diarrhea. Acidfast structures are found in the stool. From this finding, which of the following is true?

A case of leprosy with good Cell mediated immunity usually presents as following form of disease

In the U.S., a baby has the greatest chance of acquiring which virus in utero?

Which of the following parasites typically infects humans directly from a human source, rather than primarily from pigs or dogs?

Each of the following statements concerning exotoxins is correct EXCEPT:

The neuraminidase of influenza virus exhibit all the following properties EXCEPT

Buruli ulcer is caused by

What virus commonly undergoes both antigenic shifts and antigenic drifts?

The type specific antigen (A, B or C) of influenza viruses is found on which viral constituent?

Mutations in katG gene of Mycobacterium tuberculosis are responsible for resistance to: isoniazid (INH)11XDR TB is defined as

Which one of the following outcomes is MOST common following a primary herpes simplex virus infection?

A 42 year old man developed a “flu-like” syndrome with fever, sore throat, headache, and myalgia. Viral culture was ordered for laboratory confirmation of influenza. Which of the following would be the best specimen for isolating virus responsible for the infection?

Which of the following environmental factors do NOT increase the probability that M tuberculosis will be transmitted?

Cord growth seen on mycobacterial culture is characteristic of

Each of the following statements concerning Toxoplasma gondii is correct EXCEPT:

Which of the following ‘Vibrios’ is most commonly associated with ear infections:

Each of the following events involves recombinantion of DNA EXCEPT:

A 6-year-old girl presents to the emergency department with a fever and a lacy body rash. Her mother says that yesterday the rash was only on her face, but by this morning, had spread to her trunk and extremities. Which of the following agents is most likely?

Cholera toxin effects are mediated by stimulation of which of the following second messengers:

Each of the following statements concerning Diphyllobothrium latum is correct EXCEPT:

Swimming pool granuloma is caused by