Oral Microbiology Preparation (Ph. Heng Kanika)

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590

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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. Herpetic stomatitis

b. Pericoronitis

c. Acute necrotizing ulcerative gingivitis

d. Lateral periodontal abcess

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

a. Fusobacterium nucleatum and Actinomyces viscosus

b. Staphylococcus aureus and Streptococcus mutans

c. Fusobacterium nucleatum and Spirochetes

d. Fusobacterium nucleatum and Streptococcus mutans

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3) 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. Bacteroides

b. Staphylococcus

c. Streptococcus

d. Lactobacillus

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

a. Transferred by insects bite.

b. Transferred by hands or objects

c. Required by transient flora

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

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6) Fusobacterium Nucleatum 😕

a. Cause scarlet fever

b. Black pigmented Gram-negative microorganism

c. Implicated in Dental caries

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

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7) Coxsakievirus have been found to replicate in the?

a. Sensory nerve

b. Submucosal lymph tissue

c. Reticuloendothelial system

d. Small bowel

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8) 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 zoster

b. Epstein-Barr

c. Herpes simplex

d. Paramyxovirus

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9) Main causative organism of chicken pox is?

a. Varicella Zoster virus

b. Mumps virus

c. Measles virus

d. Fox virus

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10) Fusobacterium Nucleatum 😕

a. Gram-positive, strictly anaerobic

b. Non capsulate diplococci

c. Isolated from monomicrobial infections

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

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

a. hemolysine

b. Hyaluronidase

c. Streptodornas

d. leukotoxin A

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

a. It causes chronic granulomatous infections

b. It is a eukaryote

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

d. Short rods, but often pleomorphic

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13) Primary herpesvirus infections may cause:?

a. Herpes zoster

b. Herpetic gingivostomatitis

c. Meningititis

d. Herpes labialis

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14) Causative agent of scarlet fever?

a. Staphylococcus aureus

b. None of these

c. Streptococcus viridans

d. Streptococcus pyogens

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15) Cryptococcosis?

a. Is an infection caused by Cryptococcus neoformans

b. Is a localized inflammation around and under the nails

c. Is associated with dog lovers

d. Can cause cardiac abnormalities

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

a. Actinomyces viscosus

b. Staphylococcus aureus

c. Porphyromonas gingivalis

d. Fusobacterium Nucleatum

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17) Which microorganism implicated in pit and fissure caries?

a. Streptococcus mitis

b. Streptococcus mutans

c. Staphylococcus aureus

d. Actinimyces viscosus

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18) Mumps virus is belonging to?

a. Retroviriae

b. Orthomyxoviridae

c. None of these

d. Paramyxoviridae

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

a. Hemolysin

b. Hyaluronides

c. Streptokinase

d. Phosphate

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

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

b. Black pigmented Gram-positive

c. Microaerophilic

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

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21) Epstein-Barr Virus (EBV)?

a. Group A infect: skin and mucous membranes

b. Betaherpesvirus subfamily of herpesviruses

c. Cause of infectious mononucleosis

d. Achieves latency in sensory ganglia

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

a. cigar-shaped bacilli

b. Aggressive forms of periodontal disease in adolescents

c. Aggressive forms of dental caries in adolescents

d. Non-capsulate diplococcic

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23) 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. Staphylococcus aureus

b. Candida albicans

c. Herpes simplex

d. Actinomyces

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24) Herpagina is usually cause by?

a. Hepatitis A virus

b. Cytomegalovirus

c. Group A coxsackieviruses

d. Group B coxackieviruses

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25) 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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26) 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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27) 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. Extracellular glucan production.

d. Are cause of infective meningitides

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28) 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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29) AIDS virus is ?

a. RNA virus

b. Enterovirus

c. Retro virus

d. DNA virus

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30) During AIDS, HIV infects?

a. B Lymphocytes

b. CD2 lymphocytes

c. CD3 lymphocytes

d. CD4 lymphocytes

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