Oral Microbiology Preparation (Ph. Heng Kanika)

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590

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1) The virulence of Porphyromonas gingivalis is partly due to?

a. Cytotoxins

b. Adhesins

c. Hyaluronic acid

d. Proteases, haemolysin and collagenase

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2) Epstein-Barr Virus (EBV)?

a. Betaherpesvirus subfamily of herpesviruses

b. Achieves latency in sensory ganglia

c. Cause of infectious mononucleosis

d. Group A infect: skin and mucous membranes

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3) Primary herpesvirus infections may cause:?

a. Meningititis

b. Herpes zoster

c. Herpetic gingivostomatitis

d. Herpes labialis

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4) Main causative organism of chicken pox is?

a. Measles virus

b. Fox virus

c. Varicella Zoster virus

d. Mumps virus

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5) Several infections occur in the oral cavity that are of relevance to the dental team. Which of the following infections does virus cause?

a. Acute necrotizing ulcerative gingivitis

b. Lateral periodontal abcess

c. Pericoronitis

d. Herpetic stomatitis

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6) A patient attends the surgery with bilateral swelling of the parotid salivary glands. Which condition are they suffering from?

a. Mumps

b. Rubella

c. A. Measles

d. Poliomyelitis

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7) There are some main routes of infection in oral cavity, which one is inexact?

a. Transferred by insects bite.

b. Required by transient flora

c. Transferred by hands or objects

d. Transferred through the air on dust particles or water droplets

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8) Which of the following statements on Actinomycetes are not true?

a. It infrequently causes actinomycoses of the jaws after tooth extractions

b. Short rods, but often pleomorphic

c. It is a eukaryote

d. It causes chronic granulomatous infections

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9) Fusobacterium Nucleatum 😕

a. Gram-positive, strictly anaerobic

b. Non capsulate diplococci

c. Produce proinflammatory cytokines and up-regulating the inflammatory response

d. Isolated from monomicrobial infections

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10) Various viral infections are of relevance to the dental team, including those that cause disease affecting the head neck region. Which one of the following viruses causes cold sores?

a. Herpes simplex

b. Herpes zoster

c. Paramyxovirus

d. Epstein-Barr

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11) Elderly patients sometimes present with a fungal infection of the palate, beneath a denture,referred to as denture stomatitis. Which organism causes this condition?

a. Candida albicans

b. Staphylococcus aureus

c. Actinomyces

d. Herpes simplex

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12) Which of the following organisms is most likely to be implicated in dental caries?

a. Staphylococcus aureus

b. Staphylococcus epidermidis

c. Streptococcus sorbinus

d. Escherichia coli

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13) Which of the following statement on Actinobacillus actinomycetemcomitans are true?

a. Aggressive forms of dental caries in adolescents

b. cigar-shaped bacilli

c. Non-capsulate diplococcic

d. Aggressive forms of periodontal disease in adolescents

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14) Mumps virus is belonging to?

a. Paramyxoviridae

b. Retroviriae

c. Orthomyxoviridae

d. None of these

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15) Acute necrotizing ulcerative gingivitis (ANUG) or trench mouth is caused by a mixed bacterial infection such as?

a. Fusobacterium nucleatum and Spirochetes

b. Fusobacterium nucleatum and Streptococcus mutans

c. Fusobacterium nucleatum and Actinomyces viscosus

d. Staphylococcus aureus and Streptococcus mutans

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16) Coxsakievirus have been found to replicate in the?

a. Submucosal lymph tissue

b. Sensory nerve

c. Small bowel

d. Reticuloendothelial system

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17) AIDS virus is ?

a. Enterovirus

b. RNA virus

c. DNA virus

d. Retro virus

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18) Cryptococcosis?

a. Is a localized inflammation around and under the nails

b. Is associated with dog lovers

c. Can cause cardiac abnormalities

d. Is an infection caused by Cryptococcus neoformans

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19) Actinobacillus actinomycetemcomitans possesses certain virulence factors that enable it to invade tissues, such as ?

a. leukotoxin A

b. Streptodornas

c. hemolysine

d. Hyaluronidase

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20) Causative agent of scarlet fever?

a. Staphylococcus aureus

b. Streptococcus viridans

c. None of these

d. Streptococcus pyogens

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21) There are many different types of bacteria normally present in the oral cavity. Which of the following is the name of the one most likely to be associated with the onset of dental caries?

a. Streptococcus

b. Bacteroides

c. Staphylococcus

d. Lactobacillus

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22) Toxins or enzymes which are not produced by streptococcus pyogenes?

a. Phosphate

b. Hemolysin

c. Hyaluronides

d. Streptokinase

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23) Fusobacterium Nucleatum 😕

a. Implicated in Dental caries

b. Plays a crucial role in the beginning of periodontal disease

c. Black pigmented Gram-negative microorganism

d. Cause scarlet fever

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24) During AIDS, HIV infects?

a. CD2 lymphocytes

b. CD3 lymphocytes

c. B Lymphocytes

d. CD4 lymphocytes

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25) Certain strains of Streptococcus mutans?

a. Cause of periodontal disease by the production of lactic and acids from fermentation of sugars

b. Are cause of infective meningitides

c. Extracellular glucan production.

d. Cause dental caries by the production of lactic and other acids, from fermentation of sugars

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26) Which microorganism implicated in pit and fissure caries?

a. Actinimyces viscosus

b. Streptococcus mutans

c. Streptococcus mitis

d. Staphylococcus aureus

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27) Which of the following statements on Prevotella Intermedia are true:?

a. Black pigmented Gram-positive

b. Implicated in periodontal disease in association with P. gingivalis

c. Implicated in dental Caries in association with Aggregatibacter actino- mycetemcomitans.

d. Microaerophilic

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28) Porphyromonas gingivalis:?

a. Are isolated from many extra oral sites

b. Are non-capsulated

c. Are Gram-positive pleomorphic rods

d. Are aggressive periodontal pathogens

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29) Herpagina is usually cause by?

a. Hepatitis A virus

b. Group B coxackieviruses

c. Group A coxsackieviruses

d. Cytomegalovirus

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30) The organisms most commonly associated with root caries are ?

a. Porphyromonas gingivalis

b. Actinomyces viscosus

c. Fusobacterium Nucleatum

d. Staphylococcus aureus

Your score is

The average score is 86%

Any comments?

Any problems/errors or mistakes found while testing, please let us know for modification!

និស្សិតអាចប្រាប់មកកាន់ពួកយើងបានដើម្បីកែកំហុស ឬអំពីបញ្ហាដោយអចេតនាណាមួយដែលកើតមានកំឡុងពេលធ្វើតេស្ត