Microbiology: Mycobateria And Other Bacteria With Unusual Growth Requirements

50 Questions | By Outsider_matthew | Updated: Mar 20, 2022 | Attempts: 68

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Microbiology: Mycobateria And Other Bacteria With Unusual Growth Requirements - Quiz

This is a 50 item quiz. Time limit: 1 hour.

Questions and Answers

1.

Runyon's classification of NTM are based on:
- A.
  
  Colony texture
- B.
  
  Colonial pigmentation
- C.
  
  Epidemiology
- D.
  
  Rate of growth
- E.
  
  B and D
2.

Reservoir of M. kansasii
- A.
  
  Humans with cavitary diseases
- B.
  
  Tap water
- C.
  
  Children
- D.
  
  Natural waters
- E.
  
  None of the above
3.

Which does NOT develop pigment following exposure to light after being grown in the dark for more than 7 days?
- A.
  
  M. asiaticum
- B.
  
  M. kansasii
- C.
  
  M. szulgai
- D.
  
  A and B
- E.
  
  All of the above
4.

VeHabitat of M. scrofulaceum
- A.
  
  Soil
- B.
  
  Water
- C.
  
  Raw milk
- D.
  
  Dairy products
- E.
  
  All of the above
5.

Which is NOT true
- A.
  
  M. gordonae is nonpathogenic
- B.
  
  Mycobacteria are slow growers
- C.
  
  Mycobacteria are nonpigmented
- D.
  
  Mycobacteria contain N-acteylmuramic acid in their cell wall
- E.
  
  Tuberculin testing is the primary means of identifying individuals with M. tuberculosis
6.

Which is does NOT belong to the Mycobacterium avium complex?
- A.
  
  M. avium
- B.
  
  M. lepraemurium
- C.
  
  M. silvaticum
- D.
  
  M. leprae
- E.
  
  M. intracellure
7.

Which is NOT true?
- A.
  
  Translucent or tranparent colonies of MAC are more virulent than opaque colonies
- B.
  
  M. leprae cannot be cultivated in vitro
- C.
  
  Numerous AFB can be obtained from lesions of Tuberculoid leprosy
- D.
  
  Wade-Fite technique is used for acid fast staining of paraffinized tissue
- E.
  
  M. marinum grows at RT
8.

Specimen of choice for NTM
- A.
  
  Sputum
- B.
  
  Gastric aspirate
- C.
  
  Urine
- D.
  
  Fecal specimen
- E.
  
  Bronchial washings
9.

Which is not a desirablespecimen for mycobacteria?
- A.
  
  Gastric aspirate
- B.
  
  Blood
- C.
  
  CSF
- D.
  
  24 hr urine
- E.
  
  Semen
10.

Specimen of choice for MAC in AIDS patients
- A.
  
  Blood
- B.
  
  CSF
- C.
  
  Stool
- D.
  
  Sputum
- E.
  
  A and D
11.

Which is a mucolytic agent in decontamination and concentration?
- A.
  
  N-Acetyl-L-Cystein
- B.
  
  NaOH
- C.
  
  Zerphiran Chloride
- D.
  
  Trisodium Phosphate
- E.
  
  A and B
12.

A milder decontaminating solution allowing longer time period for decontamination
- A.
  
  NALC-NaOH method
- B.
  
  Benzalkonium Chloride-Trisodium Phosphate Method
- C.
  
  Modfied Benzalkonium Chloride-Trisodium Phosphate Method
- D.
  
  All of the above
- E.
  
  A and B
13.

Which is NOT true?
- A.
  
  For culture, use 2 solid media and 1 liquid media
- B.
  
  Voided urine does not require decontamination
- C.
  
  Bottle caps should be loose in the first 2 weeks of incubation
- D.
  
  NaOH is a toxic decontaminating agent
- E.
  
  B and D
14.

Excellent medium for MOTT especially MAC
- A.
  
  Lowenstein-Jensen with pyruic acid
- B.
  
  L-J with iron
- C.
  
  Bactec 12B medium
- D.
  
  Mitchison's selective 7H 11
- E.
  
  Wallenstein
15.

Which is NOT correctly matched?
- A.
  
  M. tuberculosis - tapered ends
- B.
  
  MOTT - thicker and more beaded
- C.
  
  M. avium-intracellulare - short and coccobacillary
- D.
  
  M. kansasii - barber's pole appearance
- E.
  
  None of the above
16.

A buff colored, slow growing, rough colony, and a positive niacin test is a preliminary ID for:
- A.
  
  M. tuberculosis
- B.
  
  M. bovis
- C.
  
  M. kansasii
- D.
  
  MAC
- E.
  
  MOTT
17.

Which does NOT reduce nitrate?
- A.
  
  M. tuberculosis
- B.
  
  M. scrofulaceum
- C.
  
  M. szulgai
- D.
  
  M. fortuitum
- E.
  
  M. kansasii
18.

Heating at 68 degress Celsius for 20min inactivates catalase in:
- A.
  
  M. bovis
- B.
  
  M. tuberculosis
- C.
  
  M. gastri
- D.
  
  M. haemophlium
- E.
  
  All of the above
19.

Which are rapid growers?
- A.
  
  M. fortuitum
- B.
  
  M. gordonae
- C.
  
  M. chelonae
- D.
  
  B and C
- E.
  
  A and C
20.

Inhibited by thiophene-2-carboxylic acid hydrazide
- A.
  
  M. marinum
- B.
  
  M. bovis
- C.
  
  M. tuberculosis
- D.
  
  M. asiaticum
- E.
  
  None of the above
21.

Chlamydia are:
- A.
  
  Cell wall deficient
- B.
  
  Produce endotoxin and exotoxin
- C.
  
  Obligate intracellular parasites
- D.
  
  All of the above
- E.
  
  Only A and C
22.

Has pear shaped elemental bodies
- A.
  
  C. psittaci
- B.
  
  C. trachomatis
- C.
  
  C. pneumoniae
- D.
  
  All of the above
- E.
  
  A and B
23.

Which is NOT true?
- A.
  
  C. trachomatis causes trachoma
- B.
  
  C. trachomatis has 18 species specific Ag while C. psittaci has 15
- C.
  
  Chlamydia has tropism for columnar cells
- D.
  
  Inclusion conjunctivitis is caused by C. trachomatis
- E.
  
  Lymphogranuloma venereum is caused by C. psittaci
24.

Cell lines used in culture for C. trachomatis
- A.
  
  HL cell line
- B.
  
  HeLa cells
- C.
  
  Hep 2 cells
- D.
  
  McCoy cells
- E.
  
  B and D
25.

Levinthal-Cole-Lillie bodies are inclusions in
- A.
  
  C. trachomatis
- B.
  
  C. psittaci
- C.
  
  C. pneumoniae
- D.
  
  All of the above
- E.
  
  None of the above