Micro-pathogenic Bacteria I
Quiz based on Micobiology Lecture - Pathogenic Bacteria I
- 1.
Which is not one of the 3 parts of Taxonomy
- A.
Classification
- B.
Nomenclature
- C.
Identification
- D.
Disausation
Correct Answer
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
Correct Answer
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
Correct Answer
A. True -
- 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
Correct Answer
A. Carry out respirations and most pathogenic species grow in airExplanation
carry out fermentation not respiration, but most pathogenic species grow in airRate this question:
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- 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
Correct Answer
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
Correct Answer
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
Correct Answer
B. Clostridium spp. produce endotoxins causing gas gangrene, tetany, diarrheaExplanation
listeria sp. affects infants and pregnant women; bacillus anthracis causes anthraxRate this question:
-
- 8.
Enterobacteriaceae are divided into lactose fermenters (pink colonies on agar) and non lactose fermenters (clear colonies)
- A.
True
- B.
False
Correct Answer
A. True -
- 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
Correct Answer
D. Helicobacter pylori -
- 10.
This gram negative rod causes infectious diarrhea
- A.
Vibrio spp.
- B.
Pseudomonas
- C.
Campylobacter jejuni
- D.
Helicobacter pylori
Correct Answer
C. Campylobacter jejuni -
- 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.
Correct Answer
C. Haemophilus spp. -
- 12.
This gram negative rod causes whooping cough
- A.
Haemophilus spp
- B.
Bordatella spp.
- C.
Brucella
- D.
Legionellla
Correct Answer
B. Bordatella spp. -
- 13.
This gram negative rod causes cat scratch fever
- A.
Brucella
- B.
Haemophilus spp
- C.
Bordatella spp:
- D.
Bartonella
Correct Answer
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
Correct Answer
B. Includes treponema pallidum, borrelia spp. and leptospiraExplanation
spirochetes includes treponema pallidum, borrelia spp. and leptospiraRate this question:
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- 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
Correct Answer
A. Are spherical shaped bacteriaExplanation
spirochetes are helical shapedRate this question:
-
- 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
Correct Answer
A. C. trachomatis, C. pneumonia -
- 17.
Small intracellular, rod shaped bacteria also obligate parasites, causes Rocky mountain Spotted Fever
- A.
Mycoplasma
- B.
Rickettsiae
- C.
C. trachomatis
- D.
Treponema pallidum
Correct Answer
B. Rickettsiae -
- 18.
Mycoplasma requires sterols for growth and lacks rigid cell wall ( no murein)
- A.
True
- B.
False
Correct Answer
A. True -
- 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
Correct Answer
B. Strains that cause toxic shock syndrome are pyogenicExplanation
strains that cause toxic shock syndrome are not pyogenicRate this question:
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- 20.
MSCRAMMS allow bacteria to colonize skin and mucosal surfaces
- A.
True
- B.
False
Correct Answer
A. True -
- 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
Correct Answer
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
Correct Answer
C. Hyaluronidase -
- 23.
Virulence factor that causes damage to cells and interferes with homeostasis
- A.
Catalase
- B.
PBP2a
- C.
Hyaluronidase
- D.
Pore forming toxins
Correct Answer
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
Correct Answer
D. Catalase -
- 25.
Virulence factor that converts fibrinogen to fibrin and blocks phagocytosis
- A.
Capsule
- B.
Catalase
- C.
Coagulase
- D.
Hyaluronidase
Correct Answer
C. CoagulaseExplanation
capsule only inhibits phagocytosis, coagulase is converts fibrinogen and blocks phagocytosisRate this question:
-
- 26.
Which of the following is coagulase positive
- A.
S. saprophyticus
- B.
S. aureus
- C.
S. lugdenensis
- D.
S. epidermidis
Correct Answer
B. S. aureus -
- 27.
This coagulase negative staphylococci causes urinary tract infections and cystitis
- A.
S. aureus
- B.
S. saprophyticus
- C.
S. lugdenensis
- D.
S. epidermidis
Correct Answer
B. S. saprophyticus -
- 28.
A patient is admitted to the hospital to receive an IV catheter, which of the following coagulase negative staph bacteria may complicate the procedure?
- A.
S. saprophyticus
- B.
S epidermidis
- C.
S. lugdenensis
- D.
S. aureus
Correct Answer
B. S epidermidis -
- 29.
Staphylococcal scalded skin syndrome (SSSS) causes sloughing of the skin in neonates is characterized by exfoliative exotoxins that cause separation of the layers of the skin
- A.
True
- B.
False
Correct Answer
A. True -
- 30.
Toxic shock syndrome can occur in an anaerobic environmentnd features 3 toxins that prevent formation of inflammation
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
toxic shock syndrome requires oxygen and does prevent inflammationRate this question:
-
- 31.
Food poisoning is linked to
- A.
Serotypes A-E
- B.
GAS
- C.
S. aureus
- D.
MRSA
Correct Answer
A. Serotypes A-E -
- 32.
Staph infected patients that are also colonized by VRE should be treated with clindamycin or bactrim
- A.
True
- B.
False
Correct Answer
A. True -
- 33.
Gram + Cocci in pairs or chains that are normally found on the skin and nasopharynx would most likely be
- A.
Streptococci
- B.
Enterococci
- C.
Legionella
- D.
Salmonella
Correct Answer
A. Streptococci -
- 34.
Hemolytic pattern refers to the pattern strep cultures form on blood agar plates. Which hemolytic pattern results in a complete clearing?
- A.
Alpha hemolysis
- B.
Beta hemolysis
- C.
Gamma hemolysis
Correct Answer
B. Beta hemolysis -
- 35.
Viridans streptococci include
- A.
Alpha and gamma hemolytic strep
- B.
Beta and gamma hemolytic streo
- C.
Alpha and beta hemolytic strep
- D.
None of the above
Correct Answer
A. Alpha and gamma hemolytic strep -
- 36.
Group A Strep is linked to all of the following except
- A.
Stays localized to site of infection
- B.
Immune related disease
- C.
High morbidity and mortality in developing countries
- D.
Extracellular proteins that cause extensive tissue damage
Correct Answer
A. Stays localized to site of infectionExplanation
strep spreads from the local site of infectionRate this question:
-
- 37.
Strep can have asymptomatic carriers and transmission is facilitated when it colonizes the nose
- A.
True
- B.
False
Correct Answer
A. True -
- 38.
Acute pharyngitis, acute glomerulonephritis, and acute rheumatic fever are closely linked to
- A.
S. aureus
- B.
Group A Strep
- C.
None of the above
Correct Answer
B. Group A Strep -
- 39.
Group A Strep cannot penetrate intact skin
- A.
True
- B.
False
Correct Answer
A. True -
- 40.
If strep is able to penetrate the deeper layers of skin it is most likely to cause
- A.
Erypiselas and cellulitis
- B.
Impetigo
- C.
Peritonsillar abscess
- D.
None of the above
Correct Answer
A. Erypiselas and cellulitis -
- 41.
Which of the following helps strep to spread
- A.
Proteases
- B.
Hyaluronidases
- C.
Streptokinases
- D.
All of the above
Correct Answer
D. All of the above -
- 42.
Which of the following determines strep's hemolytic pattern on blood agar
- A.
Streptolysin o
- B.
Streptolysin s
- C.
Serotype a-e
- D.
A and B
Correct Answer
D. A and B -
- 43.
Strep's enzymes help it to spread by breaking down large protein molecules that may hinder its spread
- A.
True
- B.
False
Correct Answer
A. True -
- 44.
M protein and an Hyaluronic acid capsule help strep to be resistant to phagocytosis
- A.
True
- B.
False
Correct Answer
A. True -
- 45.
Strep bacteria must secrete hyaluronidase to digest their capsule prior to binding to epithelium
- A.
True
- B.
False
Correct Answer
A. True -
- 46.
M protein is responsible for all of the following except
- A.
Mucoid appearance of strep on blood agar
- B.
Immune related disease resulting from mimicking human proteins
- C.
Adhere to keratinocytes
- D.
Prevents opsonization by complement
Correct Answer
A. Mucoid appearance of strep on blood agarExplanation
mucoid appearance is due to strep's capsuleRate this question:
-
- 47.
Scarlet fever related to strep is because of
- A.
Pyrogenic exotoxins A,B,C
- B.
Hyaluronidase
- C.
M- protein
Correct Answer
A. Pyrogenic exotoxins A,B,C -
- 48.
Streptococcal pyrogenic exotoxins SPE-A, SPE-C stimulate the release of cytokines that can lead to sepsis, shock and multi organ failure and SPE-A is responsible for Toxic shock syndrome
- A.
True
- B.
False
Correct Answer
A. True -
- 49.
Acute rheumatic fever and acute post streptococcal glomerulonephritis both
- A.
Appear as sequelae to strep infection 1-4 weeks after infection
- B.
Can be treated with antibiotics
- C.
Cause carditis, poly arthritis, chorea, nodules and erythema marginatum
- D.
None of the above
Correct Answer
A. Appear as sequelae to strep infection 1-4 weeks after infection -
- 50.
Which best describes group b streptococci
- A.
Also called s. mutans and s. milleri
- B.
Normally found in gi tract and female genital tracts
- C.
Result in immune related disease
- D.
High morbidity and mortality in developing countries
Correct Answer
B. Normally found in gi tract and female genital tracts -
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Current Version
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Mar 16, 2022Quiz Edited by
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Oct 08, 2010Quiz Created by
Chinedua
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