Oral Microbiology Preparation (Ph. Heng Kanika)

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590

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

a. It is a eukaryote

b. It causes chronic granulomatous infections

c. Short rods, but often pleomorphic

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

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

a. Streptodornas

b. leukotoxin A

c. hemolysine

d. Hyaluronidase

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3) Mumps virus is belonging to?

a. Paramyxoviridae

b. Retroviriae

c. None of these

d. Orthomyxoviridae

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

a. Poliomyelitis

b. Rubella

c. Mumps

d. A. Measles

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5) 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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6) AIDS virus is ?

a. Retro virus

b. DNA virus

c. Enterovirus

d. RNA virus

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

a. Phosphate

b. Streptokinase

c. Hemolysin

d. Hyaluronides

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

a. Cytotoxins

b. Hyaluronic acid

c. Proteases, haemolysin and collagenase

d. Adhesins

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9) 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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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. Staphylococcus

b. Lactobacillus

c. Bacteroides

d. Streptococcus

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11) Fusobacterium Nucleatum 😕

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

b. Black pigmented Gram-negative microorganism

c. Cause scarlet fever

d. Implicated in Dental caries

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12) Herpagina is usually cause by?

a. Cytomegalovirus

b. Hepatitis A virus

c. Group B coxackieviruses

d. Group A coxsackieviruses

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13) 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. Actinomyces

c. Staphylococcus aureus

d. Candida albicans

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14) Coxsakievirus have been found to replicate in the?

a. Sensory nerve

b. Reticuloendothelial system

c. Small bowel

d. Submucosal lymph tissue

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

a. Microaerophilic

b. Black pigmented Gram-positive

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

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

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16) Cryptococcosis?

a. Can cause cardiac abnormalities

b. Is associated with dog lovers

c. Is a localized inflammation around and under the nails

d. Is an infection caused by Cryptococcus neoformans

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

a. Fusobacterium nucleatum and Spirochetes

b. Staphylococcus aureus and Streptococcus mutans

c. Fusobacterium nucleatum and Actinomyces viscosus

d. Fusobacterium nucleatum and Streptococcus mutans

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

a. Fusobacterium Nucleatum

b. Porphyromonas gingivalis

c. Actinomyces viscosus

d. Staphylococcus aureus

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19) Causative agent of scarlet fever?

a. None of these

b. Streptococcus pyogens

c. Streptococcus viridans

d. Staphylococcus aureus

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20) Which microorganism implicated in pit and fissure caries?

a. Actinimyces viscosus

b. Streptococcus mitis

c. Staphylococcus aureus

d. Streptococcus mutans

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21) 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. Herpetic stomatitis

c. Acute necrotizing ulcerative gingivitis

d. Lateral periodontal abcess

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22) Primary herpesvirus infections may cause:?

a. Herpes zoster

b. Herpetic gingivostomatitis

c. Herpes labialis

d. Meningititis

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23) 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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24) Epstein-Barr Virus (EBV)?

a. Betaherpesvirus subfamily of herpesviruses

b. Group A infect: skin and mucous membranes

c. Cause of infectious mononucleosis

d. Achieves latency in sensory ganglia

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25) 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. Paramyxovirus

d. Herpes simplex

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26) During AIDS, HIV infects?

a. CD2 lymphocytes

b. CD4 lymphocytes

c. B Lymphocytes

d. CD3 lymphocytes

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

a. Non-capsulate diplococcic

b. Aggressive forms of dental caries in adolescents

c. cigar-shaped bacilli

d. Aggressive forms of periodontal disease in adolescents

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

a. Staphylococcus epidermidis

b. Escherichia coli

c. Streptococcus sorbinus

d. Staphylococcus aureus

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29) Main causative organism of chicken pox is?

a. Fox virus

b. Varicella Zoster virus

c. Mumps virus

d. Measles virus

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30) Porphyromonas gingivalis:?

a. Are aggressive periodontal pathogens

b. Are isolated from many extra oral sites

c. Are Gram-positive pleomorphic rods

d. Are non-capsulated

Your score is

The average score is 86%

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