Microbiology: Micro Bio Chp 20 Exam 4 Flashcards


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Microbiology
Chapter 20
Medical Micro Kingwood Tx
updated 10 years ago by salinadanley7
Subjects:
medical microbiology, medical, infectious diseases, science, life sciences, biology
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1

Strains of Neisseria app. need which of the following structural features to be pathogenic?

a capsule, fimbriae and an LOS

2

Lipid A causes which of the following symptoms?

fever and disseminated intravascular coagulation (DIC)

3

Neisseria gonaorrhoeae infection in men is

an acute painful infection with pus discharge

4

Which of the following statements about Neisseria gonorrhoeae is FALSE?

the gonococci induce lasting immunity

5

Among the areas of the female genital tract which of the following is NOT colonized by Neisseria gonorrhoeae?

the vagina

6

The Major damage caused by Neisseria meningitides is a result of

the release of the lipid A component of lipooligosaccharide (LOS) into the tissues, triggering serious symptoms.

7

Which of the following is diagnostic for Neisseria meningitides?

the presence of Gram-negative diplococci in phagocytes of the central nervous system

8

Members of the Enterobacteriaceae can be distinguished from each other by

both motility and the ability to ferment lactose

9

What virulence factors do all proteobacteria share?

lipid A

10

Which of the following statements regarding Neisseria meningitidis is FALSE?

There are vaccines available to prevent infection with all strains

11

A lung specimen from a pneumonia patient contains Gram-negative bacilli. Laboratory test results on the bacteria show they are nonmotile cloakrooms with a thick capsule. Which pathogen is the likely cause of the pneumonia?

Klebsiella

12

which of the following coliforms is the most common cause of non-nosocomial urinary tract infections?

Escherichia coli

13

Serratia is a coliform that

produces red pigment when grown at room temperature

14

Which of the following pairs is MISMATCHED?

nonpathogenic Enterobacteriacease; Salmonella, Shigella

15

Several cases of non bloody diarrhea with nausea, fever and abdominal pain have occurred among a number of people who ate at the same restaurant. Public health officers find a food sample containing motile noncoliform, Gram-negative bacteria capable of metabolizing glucose. the "food poisoning" resulted from contamination with

Salmonella

16

Shigellosis can be differentiated from salmonellosis by

the presence of nonmotile noncoliforms in bloody diarrhea

17

What is the causative pathogen for bubonic and pneumonic plague?

Yersinia pestis

18

Which of the following bacteria requires heme for its growth?

Haemophilus

19

A young woman has a pelvic infection. A specimen contains bacilli that are bile salt tolerant, as shown by black growth on a bile-esculin agar plate. Her infection is likely caused by

Bacterodies fragilis

20

Which of the following statements concerning Pasteurella is FALSE?

It is very resistant to a wide variety of antibacterial drugs including fluorogquinolones

21

Cat scratch disease is caused by

Bartonella henselae

22

Bordetella pertussis causes disease by

interfering with the action of the ciliated epithelial cells of the trachea

23

Resistance of Pseudomonas to a wide range of antibacterial agents is partly due to its

ability to form biofilms

24

Which of the following diseases can be prevented by vaccination?

typhoid fever

25

Legionnairs' disease is diagnosed by

fluorescent antibody or other serological diagnostic procedures

26

Which of the following statements regarding Coxiella is TRUE?

It produces an infective body similar in structure and function to Gram-positive endospores

27

What is the causative pathogen of Q fever?

Coxiella burnetii

28

How do Prevotella differ from Bacteroides?

Prevotella are sensitive to bile

29

Which of the following toxins produced by Bordetella pertussis results in the accumulation of excess mucus in the trachea?

both pertussis toxin and adenylate cyclase toxin

30

Hemolytic uremic syndrome is caused by

Escherichia coli 0157:H7.

31

A cystic fibrosis patient develops a severe respiratory infection that resists treatment with standard antibiotics. A specimen from the lungs is greenish in color and contains aerobic motile Gram-negative bacilli. the patient is probably infected with

Pseudomonas aeruginosa

32

What is the characteristic lesion of Yersinia pestis?

a bubo

33

What is the antimicrobial agent of choice for treating Bacteroides infections?

metronidazole

34

What metabolic characteristic distinguishes Enterobacteriaceae from Pasteurellaceae?

Pasteurellaceae are oxidase positive

35

This growth pattern is characteristic of which organism?

Proteus

36

How is pneumonic plague transmitted?

inhalation of respiratory aerosols from a person infected with Yersinia pestis

37

A lesion called _____ is characteristic of infection with Haemophilus ducreyi.

a chancroid or soft chancre

38

Urinary tract infections with _____ are frequently complicated by the formation of kidney stones.

Proteus mirabilis

39

Infection with ______ usually produces acute upper respiratory disease but may cause meningitis in infants 3-18 months old.

Haemophilus influenzae

40

Undiagnosed or untreated infections with Neisseria gonorrhoeae in can progress to

pelvic inflammatory disease (PID)

41

Which of the following is the result of inhalation of aerosols of fresh water containing a bacterial parasite of protozoa?

Legionnaires' disease

42

Which of the following diseases is transmitted by the bite of human body lice?

trench fever

43

Inhalation of dried bodily fluids of infected animals may result in

tularemia, brucellosis, and Q fever

44

The zoonotic infection _____ in humans is characterized by fluctuating fever and chills, sweating myalgia, and headache.

brucellosis

45

Which of the following bacteria can metabolize a large range of organic compounds and is a frequent nosocomial pathogen of cystic fibrosis patients?

(there is no abnormal coloration of the mucus in these patients)

Burkholderia

46

Coliforms are distinguished from noncoliforms by their ability to ferment (glucose/ citrate/ lactose).

lactose

47

Neisseria is distinguished from many other Gram-negative pathogens by being (catalase/ oxidase/ dismutase) positive.

oxidase

48

Because of the existence of (acute/ symptomatic/ asymptomatic) carriers, the eradication of meningococcal disease is unlikely.

asymptomatic

49

Pseudomonas aeruginoas is an opportunistic pathogen because it is not (anaerobic/ invasive/ virulent).

invasive

50

Unlike other Gram-negative opportunistic bacilli, Bacteroides are (aerotolerant/ faculative/ obligate) anaerobes.

aerotolerant

51

Strains of the same species of enteric bacteria are identified by their (H/ K/ O) antigens, components of the outer membrane.

O

52

The pleomorphic bacterium (Coxiella/ Legionella/ Francisella) is an intracellular parasite that can lead to respiratory disease

Legionella

53

Pneumonia caused by Klebsiella pneumoniae often involves the destruction of (alveoli/ macrophages/ epithelium) and the production of bloody sputum.

alveoli

54

The true pathogen (Salmonella/ Shigella/ Yersinia) is a noncoliform, nonmotile, oxidase-negative member of the Enterobacteriaceae that does not produce hydrogen sulfide.

Shigella

55

Scientists have identified over 2000 unique serotypes of Salmonella, but DNA analysis indicates that they belong to a single species: S. (enterica/ typhi/ paratyphi).

enterica

56

Of the three disease caused by Yersinia pestis, only (bubonic/ black/ pneumonic) plague is communicable between humans.

pneumonic

57

Cat scratch disease is caused by Bartonella (bacillifromis/ henselae/ quintana).

henselae

58

The zoonosis (brucellosis/ bartonellosis/ tularemia) can be acquired by humans in a variety of ways, including insect bites and ingestion of infected animals.

tularemia

59

Dermonecrotic toxin is produced during (pertussis/ Legionellosis/ shigellosis) and causes localized constriction and hemorrhage of blood vessels, resulting in cell death and tissue destruction.

pertussis

60

People can reduce the chances of contracting rabbit fever by avoiding rabbits, muskrats, and (fleas/ lice/ ticks).

ticks