Micro-pathogenic Bacteria I

54 Questions | By Chinedua | Last updated: Jan 18, 2013 | Total Attempts: 216

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Quiz based on Micobiology Lecture - Pathogenic Bacteria I

Questions and Answers

1.

Which is not one of the 3 parts of Taxonomy
- A.
  
  Classification
- B.
  
  Nomenclature
- C.
  
  Identification
- D.
  
  Disausation
2.

Which of these classification terms is the most specific
- A.
  
  Kingdoms/domains
- B.
  
  Phyla
- C.
  
  Classes
- D.
  
  Orders
- E.
  
  Families
- F.
  
  Genera
- G.
  
  Strains
3.

Regarding growth properites on agar, beta hemolysis gets a clear area around colonies and alpha hemolysis gets a greenish coloring of agar around the colonies
- A.
  
  True
- B.
  
  False
4.

Which is not true about Streptococci
- A.
  
  Carry out respirations and most pathogenic species grow in air
- B.
  
  Oxygen tolerant anaerobes
- C.
  
  Main pathogens are the beta hemolytic streptococci
- D.
  
  Have proteins that aid in virulence
- E.
  
  Grow in pairs or chains
5.

Which is not true about staphylococci
- A.
  
  Can be hemolytic but most are non hemolytic
- B.
  
  Stapylococci are aerobes
- C.
  
  S. aureus produces coagulase that clots plasma
- D.
  
  Grows is grape like clusters
- E.
  
  None of the above
6.

What best describes Neisseria spp.
- A.
  
  Gram negative cocci
- B.
  
  Found in mouth and throat of healthy peopl
- C.
  
  Pathogenic species include gonococcus and meningococcus
- D.
  
  All the above
7.

Which statement about gram positive rods is true
- A.
  
  Listeria sp. causes anthrax
- B.
  
  Clostridium spp. produce endotoxins causing gas gangrene, tetany, diarrhea
- C.
  
  Includes clostridum, listeria, bacillus anthracis and pseudomonas
- D.
  
  Bacillus anthracis affects infants and pregnant women
8.

Enterobacteriaceae are divided into lactose fermenters (pink colonies on agar) and non lactose fermenters (clear colonies)
- A.
  
  True
- B.
  
  False
9.

This gram negative rod causes gastritis, gastric ulcers and gastric cancer
- A.
  
  Vibrio spp. (v.cholera)
- B.
  
  Pseudomonas
- C.
  
  Campylobacter jejuni
- D.
  
  Helicobacter pylori
10.

This gram negative rod causes infectious diarrhea
- A.
  
  Vibrio spp.
- B.
  
  Pseudomonas
- C.
  
  Campylobacter jejuni
- D.
  
  Helicobacter pylori
11.

This gram negative rod can be normally found in the throat of healthy individuals and can cause pneumonia and meningitis
- A.
  
  Helicobacter pylori
- B.
  
  Legionella
- C.
  
  Haemophilus spp.
- D.
  
  Vibrio spp.
12.

This gram negative rod causes whooping cough
- A.
  
  Haemophilus spp
- B.
  
  Bordatella spp.
- C.
  
  Brucella
- D.
  
  Legionellla
13.

This gram negative rod causes cat scratch fever
- A.
  
  Brucella
- B.
  
  Haemophilus spp
- C.
  
  Bordatella spp:
- D.
  
  Bartonella
14.

Regarding acid fast bacteria, which is not true?
- A.
  
  Includes mycobacterium, actinomycetes
- B.
  
  Includes treponema pallidum, borrelia spp. and leptospira
- C.
  
  Cause granulomas in lungs and tissue infections
- D.
  
  Can cause pneumonia
15.

Regarding spirochetes, which statement is false
- A.
  
  Are spherical shaped bacteria
- B.
  
  Treponema pallidum causes syphilis
- C.
  
  Borrelia spp. cause lyme disease and B. recurrentis causes relapsing fever
- D.
  
  Leptospira causes hemorragic fever
16.

Small intracellular bacteria, no growth on artificial media, causes STD or Pneumonia in young adults
- A.
  
  C. trachomatis, C. pneumonia
- B.
  
  Treponema paliddum
- C.
  
  Mycoplasma and leptospira
- D.
  
  Mycobacterium and borrelia
17.

Small intracellular, rod shaped bacteria also obligate parasites, causes Rocky mountain Spotted Fever
- A.
  
  Mycoplasma
- B.
  
  Rickettsiae
- C.
  
  C. trachomatis
- D.
  
  Treponema pallidum
18.

Mycoplasma requires sterols for growth and lacks rigid cell wall ( no murein)
- A.
  
  True
- B.
  
  False
19.

Which is not true about staphylococci
- A.
  
  Survives in inanimate objects and can cause disease almost anywhere on the body
- B.
  
  Strains that cause toxic shock syndrome are pyogenic
- C.
  
  Found in pimples, boils, good poisoning, endocarditis, osteomyelitis bacteremia
- D.
  
  Virulence factors include enterotoxins, teichoic acids, coagulase, leukocidins and protein a
- E.
  
  Can grow in high salt and lipid concentrations because it makes enzymes that break down skin lipids
20.

MSCRAMMS allow bacteria to colonize skin and mucosal surfaces
- A.
  
  True
- B.
  
  False
21.

The damage caused by staphylococci is due to host immune response and pathogen actions which best describes staphylococci's ability to cause damage
- A.
  
  Forms abscesses due to collection of pus in skin or cellulitis in submucosal tissue
- B.
  
  Bacteria kill neutrophils and the neutrophils release lysosymal enzymes that damage tissue
- C.
  
  Pore forming toxins, hyaluronidase, beta lactamase and PBP2a
- D.
  
  All of the above
22.

Virulence factor responsible for the break down of the matrix of connective tissue and allows staphylococcus to cause bone and joint infections
- A.
  
  Capsule
- B.
  
  PBP2a
- C.
  
  Hyaluronidase
- D.
  
  B-Lactamases
- E.
  
  Pore forming toxins
23.

Virulence factor that causes damage to cells and interferes with homeostasis
- A.
  
  Catalase
- B.
  
  PBP2a
- C.
  
  Hyaluronidase
- D.
  
  Pore forming toxins
24.

This virulence factor is present in staph but not in strep and converts hydrogen peroxide to water
- A.
  
  Coagulase
- B.
  
  Hyaluronidase
- C.
  
  PBP2a
- D.
  
  Catalase
25.

Virulence factor that converts fibrinogen to fibrin and blocks phagocytosis
- A.
  
  Capsule
- B.
  
  Catalase
- C.
  
  Coagulase
- D.
  
  Hyaluronidase