Oral Microbiology Preparation (Ph. Heng Kanika)

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135

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

a. Pericoronitis

b. Lateral periodontal abcess

c. Acute necrotizing ulcerative gingivitis

d. Herpetic stomatitis

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2) AIDS virus is ?

a. Enterovirus

b. Retro virus

c. RNA virus

d. DNA virus

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3) Certain strains of Streptococcus mutans?

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

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

c. Are cause of infective meningitides

d. Extracellular glucan production.

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4) Herpagina is usually cause by?

a. Group A coxsackieviruses

b. Group B coxackieviruses

c. Hepatitis A virus

d. Cytomegalovirus

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

a. Non-capsulate diplococcic

b. cigar-shaped bacilli

c. Aggressive forms of periodontal disease in adolescents

d. Aggressive forms of dental caries in adolescents

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

a. Fusobacterium Nucleatum

b. Actinomyces viscosus

c. Porphyromonas gingivalis

d. Staphylococcus aureus

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

a. Hyaluronides

b. Streptokinase

c. Phosphate

d. Hemolysin

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8) Porphyromonas gingivalis:?

a. Are isolated from many extra oral sites

b. Are aggressive periodontal pathogens

c. Are Gram-positive pleomorphic rods

d. Are non-capsulated

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9) Fusobacterium Nucleatum 😕

a. Implicated in Dental caries

b. Cause scarlet fever

c. Black pigmented Gram-negative microorganism

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

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10) 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. Lactobacillus

d. Staphylococcus

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

a. Required by transient flora

b. Transferred by insects bite.

c. Transferred by hands or objects

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

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12) Main causative organism of chicken pox is?

a. Mumps virus

b. Varicella Zoster virus

c. Fox virus

d. Measles virus

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

a. Mumps

b. A. Measles

c. Rubella

d. Poliomyelitis

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14) During AIDS, HIV infects?

a. CD2 lymphocytes

b. CD3 lymphocytes

c. B Lymphocytes

d. CD4 lymphocytes

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15) 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. Herpes simplex

b. Candida albicans

c. Actinomyces

d. Staphylococcus aureus

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16) Mumps virus is belonging to?

a. Retroviriae

b. Orthomyxoviridae

c. Paramyxoviridae

d. None of these

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17) Which microorganism implicated in pit and fissure caries?

a. Streptococcus mutans

b. Staphylococcus aureus

c. Actinimyces viscosus

d. Streptococcus mitis

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18) Primary herpesvirus infections may cause:?

a. Herpes labialis

b. Meningititis

c. Herpetic gingivostomatitis

d. Herpes zoster

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

a. Streptodornas

b. hemolysine

c. Hyaluronidase

d. leukotoxin A

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20) Causative agent of scarlet fever?

a. Staphylococcus aureus

b. None of these

c. Streptococcus pyogens

d. Streptococcus viridans

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21) Coxsakievirus have been found to replicate in the?

a. Submucosal lymph tissue

b. Small bowel

c. Sensory nerve

d. Reticuloendothelial system

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

a. Hyaluronic acid

b. Adhesins

c. Cytotoxins

d. Proteases, haemolysin and collagenase

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23) Epstein-Barr Virus (EBV)?

a. Cause of infectious mononucleosis

b. Betaherpesvirus subfamily of herpesviruses

c. Group A infect: skin and mucous membranes

d. Achieves latency in sensory ganglia

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24) Cryptococcosis?

a. Is associated with dog lovers

b. Is an infection caused by Cryptococcus neoformans

c. Can cause cardiac abnormalities

d. Is a localized inflammation around and under the nails

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

a. Black pigmented Gram-positive

b. Microaerophilic

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

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

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

a. Escherichia coli

b. Streptococcus sorbinus

c. Staphylococcus aureus

d. Staphylococcus epidermidis

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27) Fusobacterium Nucleatum 😕

a. Isolated from monomicrobial infections

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

c. Non capsulate diplococci

d. Gram-positive, strictly anaerobic

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

a. It causes chronic granulomatous infections

b. Short rods, but often pleomorphic

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

d. It is a eukaryote

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29) 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. Epstein-Barr

b. Herpes simplex

c. Herpes zoster

d. Paramyxovirus

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

a. Staphylococcus aureus and Streptococcus mutans

b. Fusobacterium nucleatum and Streptococcus mutans

c. Fusobacterium nucleatum and Spirochetes

d. Fusobacterium nucleatum and Actinomyces viscosus

Your score is

The average score is 89%

Any comments?

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និស្សិតអាចប្រាប់មកកាន់ពួកយើងបានដើម្បីកែកំហុស ឬអំពីបញ្ហាដោយអចេតនាណាមួយដែលកើតមានកំឡុងពេលធ្វើតេស្ត