Oral Microbiology Preparation (Ph. Heng Kanika)

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1) Fusobacterium Nucleatum 😕

a. Black pigmented Gram-negative microorganism

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

c. Implicated in Dental caries

d. Cause scarlet fever

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2) AIDS virus is ?

a. Retro virus

b. RNA virus

c. DNA virus

d. Enterovirus

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3) Main causative organism of chicken pox is?

a. Varicella Zoster virus

b. Fox virus

c. Measles virus

d. Mumps virus

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4) 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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5) 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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6) During AIDS, HIV infects?

a. CD4 lymphocytes

b. B Lymphocytes

c. CD2 lymphocytes

d. CD3 lymphocytes

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7) Certain strains of Streptococcus mutans?

a. Extracellular glucan production.

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

c. Are cause of infective meningitides

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

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8) Mumps virus is belonging to?

a. Paramyxoviridae

b. Orthomyxoviridae

c. Retroviriae

d. None of these

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9) 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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10) Herpagina is usually cause by?

a. Hepatitis A virus

b. Cytomegalovirus

c. Group A coxsackieviruses

d. Group B coxackieviruses

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

a. Hemolysin

b. Streptokinase

c. Hyaluronides

d. Phosphate

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12) 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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13) Fusobacterium Nucleatum 😕

a. Gram-positive, strictly anaerobic

b. Isolated from monomicrobial infections

c. Non capsulate diplococci

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

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

a. Hyaluronic acid

b. Cytotoxins

c. Adhesins

d. Proteases, haemolysin and collagenase

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

a. cigar-shaped bacilli

b. Non-capsulate diplococcic

c. Aggressive forms of periodontal disease in adolescents

d. Aggressive forms of dental caries in adolescents

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16) Primary herpesvirus infections may cause:?

a. Herpetic gingivostomatitis

b. Herpes labialis

c. Herpes zoster

d. Meningititis

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17) 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. Pericoronitis

c. Herpetic stomatitis

d. Lateral periodontal abcess

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18) 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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19) 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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20) 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 causes chronic granulomatous infections

d. It is a eukaryote

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21) 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. Staphylococcus aureus and Streptococcus mutans

d. Fusobacterium nucleatum and Actinomyces viscosus

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

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

b. Transferred by insects bite.

c. Required by transient flora

d. Transferred by hands or objects

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23) Porphyromonas gingivalis:?

a. Are non-capsulated

b. Are Gram-positive pleomorphic rods

c. Are isolated from many extra oral sites

d. Are aggressive periodontal pathogens

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24) Coxsakievirus have been found to replicate in the?

a. Reticuloendothelial system

b. Small bowel

c. Submucosal lymph tissue

d. Sensory nerve

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

a. Porphyromonas gingivalis

b. Staphylococcus aureus

c. Actinomyces viscosus

d. Fusobacterium Nucleatum

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26) Which microorganism implicated in pit and fissure caries?

a. Streptococcus mutans

b. Actinimyces viscosus

c. Streptococcus mitis

d. Staphylococcus aureus

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27) 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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28) Causative agent of scarlet fever?

a. Streptococcus pyogens

b. Streptococcus viridans

c. Staphylococcus aureus

d. None of these

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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. Herpes simplex

b. Paramyxovirus

c. Herpes zoster

d. Epstein-Barr

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

a. Escherichia coli

b. Staphylococcus aureus

c. Streptococcus sorbinus

d. Staphylococcus epidermidis

Your score is

The average score is 88%

Any comments?

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

និស្សិតអាចប្រាប់មកកាន់ពួកយើងបានដើម្បីកែកំហុស ឬអំពីបញ្ហាដោយអចេតនាណាមួយដែលកើតមានកំឡុងពេលធ្វើតេស្ត