Micro-pathogenic Bacteria I
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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
- 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
- 26.Which of the following is coagulase positive
- A.
S. saprophyticus
- B.
S. aureus
- C.
S. lugdenensis
- D.
S. epidermidis
- 27.This coagulase negative staphylococci causes urinary tract infections and cystitis
- A.
S. aureus
- B.
S. saprophyticus
- C.
S. lugdenensis
- D.
S. epidermidis
- 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
- 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
- 30.Toxic shock syndrome can occur in an anaerobic environmentnd features 3 toxins that prevent formation of inflammation
- A.
True
- B.
False
- 31.Food poisoning is linked to
- A.
Serotypes A-E
- B.
GAS
- C.
S. aureus
- D.
MRSA
- 32.Staph infected patients that are also colonized by VRE should be treated with clindamycin or bactrim
- A.
True
- B.
False
- 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
- 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
- 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
- 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
- 37.Strep can have asymptomatic carriers and transmission is facilitated when it colonizes the nose
- A.
True
- B.
False
- 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
- 39.Group A Strep cannot penetrate intact skin
- A.
True
- B.
False
- 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
- 41.Which of the following helps strep to spread
- A.
Proteases
- B.
Hyaluronidases
- C.
Streptokinases
- 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
- 43.Strep's enzymes help it to spread by breaking down large protein molecules that may hinder its spread
- A.
True
- B.
False
- 44.M protein and an Hyaluronic acid capsule help strep to be resistant to phagocytosis
- A.
True
- B.
False
- 45.Strep bacteria must secrete hyaluronidase to digest their capsule prior to binding to epithelium
- A.
True
- B.
False
- 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
- 47.Scarlet fever related to strep is because of
- A.
Pyrogenic exotoxins A,B,C
- B.
Hyaluronidase
- C.
M- protein
- 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
- 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
- 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
- 51.Group B strep causes neonatal sepsis and meningitis, because of this pregnant mothers must be screened at 35-37 weeks into their pregnancy
- A.
True
- B.
False
- 52.A patient presents with endocarditis, which of the following bacteria can be ruled out as a possible cause
- A.
S. mutans and s. sanguis
- B.
Nutritionally variant streptococci
- C.
Group b strep
- D.
Enterococci
- E.
All of the above
- 53.Enterococci are unique from other streptococci because of their ability to resist bile and high salt concentrations in the intestines and are normal flora of the GI and GU tracts
- A.
True
- B.
False
- 54.Enterococci are problematic because they
- A.
Can be resistant to all classes of antibiotics
- B.
Can cause bacteremia, UTI and endocarditis
- C.
All of the above
- D.
None of the above
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