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Microbiology > Aerobic Gram Neg Bacteria > Flashcards

Aerobic Gram Neg Bacteria Flashcards

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Biology 101 flashcards
1
Q
  1. Which of the following nonfermenters is rarely isolated in the U.S.?

A. Pseudomonas aeruginosa

B. Stenotrophomonas maltophilia

C.Burkholderia mallei

D. Burkholderia cepacia

A

C

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2
Q
  1. Which of the following diseases is most likely to be acquired from a hot tub or whirlpool?

A. Q fever

B. Erysipelas

C. Acinetobacter cellulitis

D. Pseudomonas dermatitis

A

D

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3
Q
  1. The species of Vibrio closely associated with rapidly progressing wound infections seen in patients with underlying liver disease is

A. V. alginolyticus

B. V. cholerae

C. V. vulnificus

D. V. parahaemolyticus

A

C

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4
Q
  1. Severe disseminated intravascular coagulation often complicates cases of septicemia caused by

A .B. Moraxella sp.

B.Acinetobacter sp.

C.Neisseria gonorrhoeae

D. Neisseria meningitidis

A

D

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5
Q
  1. Salmonella Typhi exhibits a characteristic biochemical pattern, which differentiates it from the other salmonellae. Which of the following is not characteristic of

S. Typhi?

A. Large amounts of H,S are produced in

TSI agar.

B. Agglutination in Vi grouping serum

C. Lysine decarboxylase positive

D. Citrate negative

A

A

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6
Q
  1. A fastidious gram-negative bacillus was isolated from a case of periodontal - disease, which upon darkfield examination was noted to have gliding motility. The most likely identification of this etiologic

agent would be

A.Capnocytophaga

B. Chromobacterium

C Kingella

D. Plesiomonas

A

A

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7
Q
  1. Which microorganism will grow only on culture media supplemented with either cysteine or cystine?

A. Actinobacillus lignieresii

B. Bartonella bacilliformis

C .Francisella tularensis

D. Kingella kingae

A

C

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8
Q
  1. The K antigen of the family

Enterobacteriaceae is

A. Heat labile

B. The somatic antigen

C. Located on the flagellum

D. The antigen used to group Shigella

A

A

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9
Q
  1. A fermentative gram-negative bacillus that is oxidase positive, motile, and grows well on MacConkey agar is

A. Aeromonas hydrophila

B. Pseudomonas aeruginosa

C. Stenotrophomonas maltophilia

D. Yersinia enterocolitica

A

A

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10
Q
  1. An environmental sampling study of

respiratory therapy equipment produced cultures of a yellow, nonfermentative (at 48 hours), gram-negative bacillus from several of the nebulizers, which would

most likely be species of

A.Chryseobacterium

B .Pseudomonas

C. Alcaligenes

D. Moraxella

A

A

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11
Q
  1. Which of the following is not true of Shigella sonnei?

A. Large numbers of organisms must be ingested to produce disease.

B. The organism produces an inflamma tory condition in the large intestine with bloody diarrhea.

C. The organism produces disease most commonly in the pediatric population.

D. The organism is a delayed lactose fermenter.

A

A

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12
Q
  1. The enterotoxins of both Vibrio cholerae O1 and noninvasive (toxigenic) strains of Escherichia coli produce serious diarrhea by what mechanism?

A. Stimulation of adenylate cyclase, which gives rise to excessive fluid secretion by the cells of the small intestine

B. Penetration of the bowel mucosa

C. Stimulation of colicin production

D. Elaboration of a dermonecrotizing toxin

A

A

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13
Q
  1. In cases of legionellosis

A. Person-to-person transmission is common

B. Farm animals are important animal reseroirs

C. Patients can present with a self-limited nonpneumonic febrile illness

D. Specimens may be cold enriched to

A

C

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14
Q
  1. Which of the following is not a character istic of Klebsiella (Calymmatobacterium) granulomatis?

A.Is often sexually transmitted

B.Is isolated on chocolate agar

C. Is the causative agent of granuloma inguinale

D. Can be diagnosed by detection of Donovan bodies in clinical specimens

A

B

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15
Q
  1. Brucella spp. are

A. The etiologic agents of relapsing fever

B. Small spiral organisms

C. Primarily a cause of endogenous

human infections

D. Intracellular pathogens

A

D

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16
Q
  1. The species of Campylobacter noted to produce septicemia, septic arthritis, meningitis, jaundice with hepatomegaly, and thrombophlebitis in debilitated

patients is

A. C. coli

B. C. fetus

C. C. laris

D. C. sputorum

A

B

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17
Q
  1. Which of the following has a negative oxidase test?

A. Aeromonas

B. Chryseobacterium

C. Hafnia

D. Vibrio

A

C

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18
Q
  1. Identify the fermentative agent that may infect reptiles and fish as well as humans when they are exposed to contaminated soil or water.

A. Aeromonas

B. Chromobacterium

C. Chryseobacterium

D. Enterobacter

A

A

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19
Q
  1. Legionella pneumophila is the etiologic agent of both Legionnaires disease and

A. Swine fever

B. Pontiac fever

C. Rift Valley fever

D. San Joaquin Valley fever

A

B

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20
Q
  1. Acinetobacter baumannii

A. Requires cysteine

B. Is oxidase negative

C. Ferments glucose

D. Does not grow on MacConkey agar

A

B

21
Q
  1. Acinetobacter baumannii

A. Requires cysteine

B. Is oxidase negative

C. Ferments glucose

D. Does not grow on MacConkey agar

A

B

22
Q
  1. The optimal specimen for the recovery of Bordetella pertussis is

A. Anterior nares swab

B. Blood

C.Expectorated sputum

D. Nasopharyngeal swab

A

D

23
Q
  1. In the past, povidone iodine, tincture of iodine prep pads and swabs, and other disinfectants have been recalled because of microbial contamination. The most likely organism to be isolated in these cases is

A. Bordetella bronchiseptica

B. Klebsiella pneumoniae

C. Pseudomonas aeruginosa

D. Serratia marcescens

A

C

24
Q
  1. Which of the following species of Pasteurella is associated with human infections following cat bites?

A. P. avium

B. P. canis

P. multocida

D. P. stomatis

A

C

25
Q
  1. Which of the following Legionella spp. positive for hippurate hydrolysis?

A. L. micdadei

B. L. longbeachae

C. L. gormanii

D. L. pneumophila

A

D

26
Q
  1. Which of the following is not characteris tic of Haemophilus influenzae biogroup aegyptius?

A. Indole negative

B. Requires V factor

C.Requires X factor

D. Aminolevulinic acid positive

A

D

27
Q
  1. Which of the following is not characteris tic of Eikenella corrodens?

A. It is a thin, gram-negative bacillus.

B. Colonies sometimes pit the surface of the agar medium.

C. It is found in the mouth and upper respiratory tract of humans.

D. tis often found in pure culture when recovered from infections.

A

D

28
Q
  1. Production of a yellow pigment is characteristic of which of the following

Enterobacter sp.?

A. E. aerogenes

B. E. cloacae

E. sakazakii

E. taylorae

A

C

29
Q
  1. Which of the following non-lactose fermenting organisms does not produce fluorescein?

A. Pseudomonas alcaligenes

B. Pseudomonas aeruginosa

C. Pseudomonas fluorescens

D. Pseudomonas putida

A

A

30
Q
  1. Which of the following organisms produce a positive phenylalanine deaminase reaction?

A. Citrobacter freundii

B. Klebsiella pneumoniae

C. Providendia stuartii

D. Yersinia enterocolitica

A

C

31
Q
  1. Vibrio vulnificus is a well-established human pathogen that is known to cause

A. Gastroenteritis

B. Pneumonia

C. Pylonephritis

D. Wound infections

A

D

32
Q
  1. Cardiobacterium hominis, an inhabitant of the upper respiratory tract of humans, has been recovered as the etiologic agent from cases of endocarditis. An identifying characteristic of the organism is

A. Positive oxidase

B. Positive catalase

Indole negative

D.) Inability to grow on sheep blood agar

A

C

33
Q
  1. Of the following microorganisms, which one will turn a dark purple when tetram ethyl-p-phenylenediamine hydrochloride is applied?

A. Acinetobacter baumannii

B. Stenotrophomonas maltophilia

Moraxella catarrhalis

Yersinia enterocolitica

A

C

34
Q
  1. Which of the following is true concerning Campylobacter jejuni?

A. Catalase negative

B.Isolated best at 24°C

C.Hydrogen sulfide positive

D. A leading cause of bacterial diarrhea worldwide

A

D

35
Q
  1. Reptiles kept as pets are sometimes associated with the transmission of

A. Campylobacter

B. Helicobacter

C. Salmonella

D. Vibrio

A

C

36
Q
  1. The selective nature of Hektoen enteric agar is due to the inclusion of which one of the following?

A. Bile salts

B. Bis-sodium metasulfate

C. Bromthymol blue

D. NaC1

A

A

37
Q
  1. The selective nature of Hektoen enteric agar is due to the inclusion of which one of the following?

A. Bile salts

B. Bis-sodium metasulfate

C. Bromthymol blue

D. NaC1

A

A

38
Q
  1. Chronic carriers, persons who remain infected with an organism for long periods, are typically associated with the dissemination of

A. Bordetella pertussis

B. Campylobacter jejuni

C. Salmonella Typhi

D. Yersinia pestis

A

C

39
Q
  1. Which of the following is an ocasional cause of respiratory tract infections and is rapidly urea positive?

ABordetella bronchiseptica

B. Brucella abortus

C. Campylobacter fetus

D. Escherichia coli

A

A

40
Q
  1. One of the most common etiologic agents of community-acquired uncomplicated cases of cystitis is

A. Enterobacter aerogenes

B. Escherichia coli

C. Klebsiella pneumoniae

D. Proteus vulgaris

A

B

41
Q
  1. Which of the following is not a correct description regarding Aeromonas hydrophila?

A. Beta-hemolytic

B. Catalase positive

C. ONPG negative

D. Oxidase positive

A

C

42
Q
  1. Which of the following is not true about Pasteurella multocida?

A. Most common human infections occur in soft tissues, bones, and joints.

B Humans harbor the organism as part of

their normal flora.

C. It is the most virulent of the species in the genus.

D. It grows on sheep blood agar.

A

B

43
Q
  1. Pus was aspirated from an empyema. A Gram stain of the aspirated material showed many white blood cells and numerous gram-negative bacilli The culture orew many colonies producing a soluble green pigment. The most likely etiologic agent in this case would be A. Chromobacterium violaceum

B. Legionella pneumophila

C. Pseudomonas aeruginosa

D. Serratia marcescens

A

C

44
Q

Some strains of Serratia marcescens

produce a red-colored pigment. Pigment production is enhanced by

A. Incubation at 22°C

B. Incubation at 42°C

C. Growth on sheep blood agar

D. Growth on typtic soy agar without blood

A

A

45
Q
  1. The causative agent of the septicemic,

hemolytic disease known as Oroya fever is

A.Bartonella bacilliformis

B. Burkholderia mallei

C. Haemophilus aegyptius

D. Yersinia pestis

A

A

46
Q
  1. Cefsulodin-irgasan-novobiocin (CIN) agar is recommended for the recovery of

A. Brucella suis

B. Cardiobacterium hominis

C. Rhodococcus equi

D. Yersinia enterocolitica

A

D

47
Q
  1. Yersinia pseudotuberculosis is known to manifest commonly as which of the following clinical conditions?

A. Epiglottitis

B. Hepatitis

C. Mesenteric lymphadenitis

D. Pseudomembranous colitis

A

C

48
Q
  1. The optimal specimen for the recovery of Bordetella pertussis is

A. Anterior nares swab

B. Blood

C.Expectorated sputum

D. Nasopharyngeal swab

A

D

49
Q
  1. In the past, povidone iodine, tincture of iodine prep pads and swabs, and other disinfectants have been recalled because of microbial contamination. The most likely organism to be isolated in these cases is

A. Bordetella bronchiseptica

B. Klebsiella pneumoniae

C. Pseudomonas aeruginosa

D. Serratia marcescens

A

C

Microbiology (14 decks)

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