Microbiology exam 3

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  1. Uptake by a receipient cell takes up DNA from a
    donor cell is called what?
  2. Trachomatis can be distinguished from chlamydia by which of the following?
  3. Schistosoma hematomia produces a disease characterized by glyoma immune response to... What are some of the clinical manifestations?
    bladder infection, renal problems, hemorrhagic cystitis
  4. Which other organisms cause urinary tract infections?
    U. Urealyticum
  5. Whilethe majority of NGU are caused by Chlamydiae trachomatis, which of the following organisms is very significant in causing additional cases in humans?
    U. Urealyticum
  6. A 23-year-old college senior presents to the student health clinic with symptoms of a suspected sexually transmitted disease (STD). Neisseria and Chlamydia agents are ruled out. Which of the following organisms is the most likely cause of his nongonococcal urethritis (NGU)?
    Ureaplasma Urealyticum
  7. A 30-year-old woman presents to the ER with an I abrupt-onset high fever, vomiting, profuse diarrhea, severe muscle aches, and disorientation.
    toxic shock syndrome
  8. 18 year old male high school student, painful rash, KOH scraping
    tinea corporis
  9. A typical pneumonia characterized by fever, headache, sore throat, cough, which of the following organisms causes this?
    M. Pneumonia
  10. Which of the following statements best characterizes LGV?
    Causative agent is c. Trachimatis
  11. Which of the following is a gram-negative bacteria with trophism for mononuclear cells and may cause infections via the respiratory pathway?
    c. burnetti
  12. a 50 year old male presents with severe bilateral pulmonary infiltrate, elevated temperature leukocytosis, elevated enzymes, and elevated creatine kinase. He recently visited his favorite restaurant that had a large water fountain that was misty on the day of his visit. Which of the following procedures would most rapidly 11. diagnose the suspected organism that is the etiologic agent of legionanaires disease In this patient?
    detection of antigen in respiratory secretions
  13. Which of the following best characterizes rickettsia, which include the spotted fevers, Q fever, typhus, and scrub typhus?
    obligate intracellular parasites
  14. a 2 year old infant is brought to the emergency room with hematuria, fever, and thrombocytopenia. Which of these bacteria would most likely be isolated from a stool specimen?
    E. Coli
  15. An outbreak of postsurgical wound infections cause by staphylococcus aureus has occurred. The infection control team was asked to determine whether the organism could be carried by one of the operating room personnel. Using your knowledge of normal flora, which one of the following body sites is the Most likely location for this organism?
  16. a 6 year old girl presents to the clinic with scaly patches on the scalp. Primary smears and culture of the skin and hair are negative. A few weeks later, she returns and is found to have inflammatory lesions. The hair flouresces under wood's light, and primary smears of skin and hair contain septate hyphae. On speaking with the parents, it is discovered that there are pets in the house. Which infecting agent?
  17. A 37 year old asian male is admitted to the hospital complaining of shortness of breath. He denies use of cigarettes, although he admits a previous history of intravenous drug abuse. His chest films show a diffuse ground glass pattern. A specimen is obtained by bronchoalveolar lavage, and distinctive thin walled trophozoites and thick walled spherical cysts containing 4-8 nucleii are boserved using metheamine-silver stain. Which of the following is the most likely diagnosis?
  18. otitis media is commonly caused by nonencapsulated strains of haemophilus influenzae. You are surprised that nonencapsulated strains can cause this disease.
    nonencapsulated strains should be easily phagocytized
  19. a parasite resembling malaria that infects both animals and humans and is carried by the same tick that transmits B. burgdorferi (the bacterium that causes Lyme disease) would most likely be observed in which of the following?
    biopsied muscle
  20. which of the following prevents malaria?
  21. your patient is a 78 year old man who had an episode of acute urinary retention and had to be catheterized.
    proteus mirabilis
  22. Which of the normally inhabits the female genital tract but may cause acute respiratory illness?
    M. Hominis
  23. A 42 year old alcoholic man presents with fever, chills, cough, and chest x-ray suggestive of pneumonia.
    Fixation, crystal violet, iodine, alcohol, safranin
  24. there are three genera of dermatophytes: epidermophyton, microsporum, and trichophyton. Which characterizes the infections caused by these organisms?
    confined to keratinzed tissue
  25. associated with bird droppings. Which of the following statements best describes the privates of organisms in tissue biopsis?
    oval budding yeast inside macrophages
  26. after an unprotected sex, a healthy 21 year old male develops pain and pus on urination. A gram stain revealed gram negative diplococcus. which of the following structures is responsible for the adherence of the offending microbe to the urethral mucosa?
  27. develops arthralgia, a maculopapular rash, and lymphadenopathy with back and bone pain.
    Dengue Fever
  28. an enterococcus (e. faecium) is isolated from urine specimen. Treatment?
  29. mycobacteria are stained by the acid fast technique because the cell walls are characterized by which of the following?
  30. trachomatis is a well known cause for viliary disease. This is indicated in which of the following?
    C. Trachomatis = blindness
  31. several laboratory tests were researched for their usefulness in evaluating suspected histoplasmosis in patients who reside in an area where disease is endemic. If the prevalence of histoplasmosis is 25% which of the following?
    sensitivity of 50%, specificity of 98%
  32. a 4 year old boy is taken to see his pediatrician because of a persistent cough that gradually worsened over a 12 day period.
    it produces a toxin that increases cAMP levels resulting in increased mucous production
  33. resistant bacteria. The involvement of sex pilus. Bacterial sex?
  34. a 26 year old male presents to his family physician with complains of painful burning during urination and milky discharge.
    Thayer- Martin agar
  35. A diphtheroid gram-positive rod may develop into a pathogenic C.diptheriae by means of a bacteriophage infection. Transfer of a donor chromosome fragment by a temperate bacterial virus is defined as which one of the following?
  36. a 20 year old homosexual man presents to the public clinic with a maculopapular rash on this hands and feet. He notes that several weeks ago he had unprotected intercourse with an unknown male at a rave party.
    condyloma lata
  37. a single, 30 year old woman presents to her physician with vaginitis. She complains of a slightly increased malodorous discharge that is gray-white in color, thin and homogenous. Clue cells
    Gardnerella vaginlis
  38. a 25 year old female is treated with a course of broad spectrum antibiotics for severe pelvic inflammatory disease.
  39. a 4 year old boy is brought to the pediatrician with a runny nose low grade fever, myalgias, and headache. He also has a distinctive high-pitched inspiratory whistle with severe paroxysmal coughing fits.
    Bordet-Gengou media
  40. in the laboratory, a virologist was studying the properties of HIV.
  41. a medical student was serving as a missionary in africa. Pricked finger by a thorn
    S. Schenkii
  42. Tinea versicolor is caused by which of the following?
    M. Furfur
  43. In the pre analytic stage of laboratory diagnositc testing caregiveers
    must do all of the above.
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Microbiology exam 3
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