Ch 14 Micro

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XQWCat
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Ch 14 Micro
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2012-11-19 23:55:37
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Microbiology
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Chapter 14 Microbiology Test 3
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  1. A commensal bacteriumA) Does not receive any benefit from its host.B) Is beneficial to its host.C) May be an opportunistic pathogen.D) Does not infect its host.E) B and D only.
    C
  2. Which of the following statements is true?A) Symbiosis refers to different organisms living together.B) Members of a symbiotic relationship cannot live without each other.C) A parasite is not in symbiosis with its host.D) Symbiosis refers to different organisms living together and benefiting from each other.E) At least one member must benefit in a symbiotic relationship.
    A
  3. A nosocomial infection isA) Always present but is inapparent at the time of hospitalization.B) Acquired during the course of hospitalization.C) Always caused by medical personnel.D) Only a result of surgery.E) Always caused by pathogenic bacteria.
    B
  4. The major significance of Koch's work was thatA) Microorganisms are present in a diseased animal.B) Diseases can be transmitted from one animal to another.C) Microorganisms can be cultured.D) Microorganisms cause disease.E) Microorganisms are the result of disease.
    D
  5. Koch's postulates don't apply to all diseases becauseA) Some microorganisms can't be cultured in laboratory media.B) Some microorganisms don't cause the same disease in laboratory animals.C) Some microorganisms cause different symptoms under different conditions.D) Some microorganisms can't be observed.E) Not all diseases are caused by microorganisms.
    E
  6. Which of the following diseases is NOT spread by droplet infection?A) BotulismB) TuberculosisC) Measles D) Common coldE) Diphtheria
    A
  7. Mechanical transmission differs from biological transmission in that mechanical transmissionA) Doesn't require an arthropod.B) Involves fomites.C) Doesn't involve specific diseases.D) Requires direct contact.E) Doesn't work with noncommunicable diseases
    C
  8. Which of the following definitions is incorrect?A) Endemic – a disease that is constantly present in a populationB) Epidemic – fraction of the population having a disease at a specified timeC) Pandemic – a disease that affects a large number of people in the world in a short timeD) Sporadic – a disease that affects a population occasionallyE) Incidence – number of new cases of a disease
    B
  9. Which of these infections can cause septicemia?A) BacteremiaB) Focal infectionC) Local infectionD) SepticemiaE) Systemic infection
    B
  10. Which type of infection can be caused by septicemia?A) BacteremiaB) Focal infectionC) Local infectionD) ViremiaE) Systemic infection
    E
  11. Koch observed Bacillus anthracis multiplying in the blood of cattle. What is this condition called?A) BacteremiaB) Focal infectionC) Local infectionD) SepticemiaE) Systemic infection
    D
  12. Which one of the following does NOT contribute to the incidence of nosocomial infections?A) Formation of biofilmsB) Lapse in aseptic techniquesC) Gram-negative cell wallsD) Lack of handwashingE) Lack of insect control
    C
  13. Transient microbiota differ from normal microbiota because transient microbiotaA) Cause diseases.B) Are found in a certain location on the host.C) Are acquired by direct contact.D) Are present for a relatively short time.E) Never cause disease.
    D
  14. Which of the following statements about nosocomial infections is false?A) They occur in compromised patients.B) They are caused by opportunists.C) They are caused by drug-resistant bacteria.D) They are caused by normal microbiota.E) The patient was infected before hospitalization.
    E
  15. One effect of washing regularly with antibacterial agents is the removal of normal microbiota. This can result inA) Body odor.B) Fewer diseases.C) Increased susceptibility to disease.D) Normal microbiota returning immediately.E) No bacterial growth because washing removes their food source.
    C
  16. Which of the following is NOT a reservoir of infection?A) A sick personB) A healthy personC) A sick animalD) A hospitalE) All of the above can be reservoirs of infection.
    E
  17. Which of the following is NOT a communicable diseases?A) MalariaB) AIDSC) TuberculosisD) TetanusE) Typhoid fever
    D
  18. Which of the following is a fomite?A) WaterB) Droplets from a sneeze C) PusD) InsectsE) A hypodermic needle
    E
  19. Which of the following statements about biological transmission is false?A) The pathogen reproduces in the vector.B) The pathogen may enter the host in the vector's feces.C) Houseflies are an important vector.D) The pathogen may be injected by the bite of the vector.E) The pathogen may require the vector as a host.
    C
  20. Which of the following definitions is incorrect?A) Acute – a short-lasting primary infectionB) Inapparent – infection characteristic of a carrier stateC) Chronic – a disease that develops slowly and lasts for monthsD) Primary infection – an initial illnessE) Secondary infection – a long-lasting illness
    E
  21. Symptoms of disease differ from signs of disease in that symptomsA) Are changes felt by the patient.B) Are changes observed by the physician.C) Are specific for a particular disease.D) Always occur as part of a syndrome.E) None of the above.
    A
  22. The science that deals with when diseases occur and how they are transmitted is calledA) Ecology.B) Epidemiology.C) Communicable disease.D) Morbidity and mortality.E) Public health.
    B
  23. Emergence of infectious diseases can be due to all of the following EXCEPTA) Antibiotic resistance.B) Climatic changes.C) Digging up soil.D) Microbes trying to cause disease.E) Travel.
    D
  24. Which of the following pairs is mismatched?A) Malaria – vectorB) Salmonellosis – vehicle transmissionC) Syphilis – direct contactD) Influenza – droplet infectionE) All of the above are correctly matched.
    E
  25. Which of the following can contribute to postoperative infections?A) Using syringes more than onceB) Normal microbiota on the operating room staffC) Errors in aseptic techniqueD) Antibiotic resistanceE) All of the above
    E
  26. A cold transmitted by a facial tissue is an example ofA) Direct contact.B) Droplet transmission.C) Fomite.D) Vector.E) Vehicle transmission.
    E
  27. Influenza transmitted by an unprotected sneeze is an example ofA) Direct contact.B) Droplet transmission.C) Fomite.D) Vector.E) Vehicle transmission.
    B
  28. A sexually transmitted disease is an example ofA) Direct contact.B) Droplet transmission.C) Fomite.D) Vector.E) Vehicle transmission.
    A
  29. Gastroenteritis acquired from roast beef is an example ofA) Direct contact.B) Droplet transmission.C) Fomite. D) Vector.E) Vehicle transmission.
    E
  30. A needlestick is an example ofA) Direct contact.B) Droplet transmission.C) Fomite.D) Vector.E) Vehicle transmission.
    C
  31. Legionellosis transmitted by a grocery store mist machine is an example ofA) Direct contact.B) Droplet transmission.C) Fomite.D) Vector.E) Vehicle transmission.
    E
  32. Plague transmitted by a flea is an example ofA) Direct contact.B) Droplet transmission.C) Fomite.D) Vector.E) Vehicle transmission.
    D
  33. The most likely mode of transmission of pneumonic plague between humans isA) Direct contact.B) Droplet transmission.C) Fomite.D) Vector.E) Vehicle transmission.
    B
  34. During a 6-month period, 239 cases of pneumonia occurred in a town of  300 people. A clinical case was defined as fever ≥39°C lasting >2 days with three or more symptoms (i.e., chills, sweats, severe headache, cough, aching muscles/joints, fatigue, or feeling ill). A laboratoryconfirmed case was defined as a positive result for antibodies against Coxiella burnetii. Before the outbreak, 2000 sheep were kept northwest of the town. Of the 20 sheep tested from the flock, 15 were positive for C. burnetii antibodies. Wind blew from the northwest, and rainfall was 0.5 cm compared with 7 to 10 cm during each of the previous 3 years.36) Situation 14.1 is an example ofA) Human reservoirs.B) A zoonosis.C) A nonliving reservoir.
    B
  35. During a 6-month period, 239 cases of pneumonia occurred in a town of  300 people. A clinical case was defined as fever ≥39°C lasting >2 days with three or more symptoms (i.e., chills, sweats, severe headache, cough, aching muscles/joints, fatigue, or feeling ill). A laboratoryconfirmed case was defined as a positive result for antibodies against Coxiella burnetii. Before the outbreak, 2000 sheep were kept northwest of the town. Of the 20 sheep tested from the flock, 15 were positive for C. burnetii antibodies. Wind blew from the northwest, and rainfall was 0.5 cm compared with 7 to 10 cm during each of the previous 3 years.In Situation 14.1, the etiologic agent of the disease isA) Sheep.B) Soil.C) Coxiella burnetii.D) Pneumonia.E) Wind.
    C
  36. During a 6-month period, 239 cases of pneumonia occurred in a town of  300 people. A clinical case was defined as fever ≥39°C lasting >2 days with three or more symptoms (i.e., chills, sweats, severe headache, cough, aching muscles/joints, fatigue, or feeling ill). A laboratoryconfirmed case was defined as a positive result for antibodies against Coxiella burnetii. Before the outbreak, 2000 sheep were kept northwest of the town. Of the 20 sheep tested from the flock, 15 were positive for C. burnetii antibodies. Wind blew from the northwest, and rainfall was 0.5 cm compared with 7 to 10 cm during each of the previous 3 years.
    In Situation 14.1, the method of transmission of this disease wasA) Direct contact.B) Droplet.C) Indirect contact.D) Vector-borne.E) Vehicle.
    E
  37. Which one of the following is NOT an example of microbial antagonism?A) Acid production by bacteriaB) Bacteriocin productionC) Bacteria occupying host receptorsD) Bacteria causing diseaseE) Bacteria producing vitamin K
    D
  38. The yeast Candida albicans does not normally cause disease because ofA) Symbiotic bacteria.B) Antagonistic bacteria.C) Parasitic bacteria.D) Commensal bacteria.E) Other fungi.
    B
  39.  Haemophilus bacteria require heme protein produced by Staphylococcus bacteria. This is an example ofA) Antagonism.B) Commensalism.C) Parasitism.D) Synergism.E) Competitive exclusion
    D
  40. Which one of the following is NOT a zoonosis?A) Cat-scratch diseaseB) Hantavirus pulmonary syndromeC) RabiesD) TapewormE) All of the above are zoonoses.
    E
  41. Pseudomonas bacteria colonized the bile duct of a patient following his liver transplant surgery. This is an example of aA) Communicable disease.B) Latent infection.C) Nosocomial infection.D) Sporadic disease.E) None of the above.
    C
  42. Which one of the following statements is false?A) Antimicrobial therapy for hemodialysis-associated infections increases antibiotic resistance. B) S. aureus is differentiated from other mannitol+ cocci by the coagulase test.C) The M in MRSA stands for mannitol.D) USA100 accounts for most hospital-acquired MRSA.E) USA300 accounts for most community-acquired MRSA.
    C

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