Oral Microbiology Preparation (Ph. Heng Kanika)

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1) Epstein-Barr Virus (EBV)?

a. Group A infect: skin and mucous membranes

b. Cause of infectious mononucleosis

c. Achieves latency in sensory ganglia

d. Betaherpesvirus subfamily of herpesviruses

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2) 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. Herpetic stomatitis

d. Pericoronitis

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

a. Staphylococcus epidermidis

b. Escherichia coli

c. Staphylococcus aureus

d. Streptococcus sorbinus

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4) 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. Epstein-Barr

d. Paramyxovirus

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

a. Hyaluronidase

b. leukotoxin A

c. hemolysine

d. Streptodornas

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6) Fusobacterium Nucleatum 😕

a. Non capsulate diplococci

b. Isolated from monomicrobial infections

c. Gram-positive, strictly anaerobic

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

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7) Mumps virus is belonging to?

a. Paramyxoviridae

b. Retroviriae

c. Orthomyxoviridae

d. None of these

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8) Fusobacterium Nucleatum 😕

a. Cause scarlet fever

b. Black pigmented Gram-negative microorganism

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

d. Implicated in Dental caries

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

a. Actinomyces viscosus

b. Fusobacterium Nucleatum

c. Staphylococcus aureus

d. Porphyromonas gingivalis

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10) Causative agent of scarlet fever?

a. Staphylococcus aureus

b. Streptococcus viridans

c. None of these

d. Streptococcus pyogens

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

a. Transferred by hands or objects

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

c. Transferred by insects bite.

d. Required by transient flora

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

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

b. It is a eukaryote

c. It causes chronic granulomatous infections

d. Short rods, but often pleomorphic

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

a. Adhesins

b. Cytotoxins

c. Proteases, haemolysin and collagenase

d. Hyaluronic acid

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14) 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. Lactobacillus

b. Staphylococcus

c. Streptococcus

d. Bacteroides

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

a. Streptokinase

b. Hyaluronides

c. Phosphate

d. Hemolysin

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16) During AIDS, HIV infects?

a. CD4 lymphocytes

b. B Lymphocytes

c. CD2 lymphocytes

d. CD3 lymphocytes

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17) AIDS virus is ?

a. DNA virus

b. Retro virus

c. Enterovirus

d. RNA virus

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18) Cryptococcosis?

a. Is an infection caused by Cryptococcus neoformans

b. Is associated with dog lovers

c. Is a localized inflammation around and under the nails

d. Can cause cardiac abnormalities

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

a. Fusobacterium nucleatum and Actinomyces viscosus

b. Fusobacterium nucleatum and Spirochetes

c. Fusobacterium nucleatum and Streptococcus mutans

d. Staphylococcus aureus and Streptococcus mutans

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20) Which microorganism implicated in pit and fissure caries?

a. Streptococcus mutans

b. Staphylococcus aureus

c. Actinimyces viscosus

d. Streptococcus mitis

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21) Certain strains of Streptococcus mutans?

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

b. Are cause of infective meningitides

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

d. Extracellular glucan production.

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22) Main causative organism of chicken pox is?

a. Measles virus

b. Mumps virus

c. Fox virus

d. Varicella Zoster virus

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

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

b. Microaerophilic

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

d. Black pigmented Gram-positive

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

a. Rubella

b. Mumps

c. A. Measles

d. Poliomyelitis

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25) Coxsakievirus have been found to replicate in the?

a. Small bowel

b. Reticuloendothelial system

c. Sensory nerve

d. Submucosal lymph tissue

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26) Primary herpesvirus infections may cause:?

a. Herpes zoster

b. Meningititis

c. Herpetic gingivostomatitis

d. Herpes labialis

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

a. Aggressive forms of periodontal disease in adolescents

b. Aggressive forms of dental caries in adolescents

c. Non-capsulate diplococcic

d. cigar-shaped bacilli

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28) 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. Actinomyces

b. Candida albicans

c. Herpes simplex

d. Staphylococcus aureus

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29) Herpagina is usually cause by?

a. Hepatitis A virus

b. Cytomegalovirus

c. Group B coxackieviruses

d. Group A coxsackieviruses

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30) Porphyromonas gingivalis:?

a. Are aggressive periodontal pathogens

b. Are non-capsulated

c. Are isolated from many extra oral sites

d. Are Gram-positive pleomorphic rods

Your score is

The average score is 89%

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និស្សិតអាចប្រាប់មកកាន់ពួកយើងបានដើម្បីកែកំហុស ឬអំពីបញ្ហាដោយអចេតនាណាមួយដែលកើតមានកំឡុងពេលធ្វើតេស្ត