Oral Microbiology Preparation (Ph. Heng Kanika)

/30

592

1 / 30

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

a. Transferred by insects bite.

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

c. Transferred by hands or objects

d. Required by transient flora

2 / 30

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

a. Porphyromonas gingivalis

b. Fusobacterium Nucleatum

c. Staphylococcus aureus

d. Actinomyces viscosus

3 / 30

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

a. Hyaluronidase

b. Streptodornas

c. hemolysine

d. leukotoxin A

4 / 30

4) Mumps virus is belonging to?

a. Orthomyxoviridae

b. Retroviriae

c. Paramyxoviridae

d. None of these

5 / 30

5) Fusobacterium Nucleatum 😕

a. Non capsulate diplococci

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

c. Gram-positive, strictly anaerobic

d. Isolated from monomicrobial infections

6 / 30

6) 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. Staphylococcus aureus

c. Actinomyces

d. Candida albicans

7 / 30

7) Main causative organism of chicken pox is?

a. Measles virus

b. Varicella Zoster virus

c. Mumps virus

d. Fox virus

8 / 30

8) 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.

9 / 30

9) Herpagina is usually cause by?

a. Cytomegalovirus

b. Hepatitis A virus

c. Group A coxsackieviruses

d. Group B coxackieviruses

10 / 30

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

a. Hemolysin

b. Hyaluronides

c. Phosphate

d. Streptokinase

11 / 30

11) 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

12 / 30

12) 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. Staphylococcus

c. Bacteroides

d. Lactobacillus

13 / 30

13) 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

14 / 30

14) AIDS virus is ?

a. DNA virus

b. Retro virus

c. RNA virus

d. Enterovirus

15 / 30

15) Which microorganism implicated in pit and fissure caries?

a. Actinimyces viscosus

b. Staphylococcus aureus

c. Streptococcus mutans

d. Streptococcus mitis

16 / 30

16) Cryptococcosis?

a. Is a localized inflammation around and under the nails

b. Is associated with dog lovers

c. Is an infection caused by Cryptococcus neoformans

d. Can cause cardiac abnormalities

17 / 30

17) 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. Epstein-Barr

d. Herpes zoster

18 / 30

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

a. Staphylococcus aureus

b. Staphylococcus epidermidis

c. Streptococcus sorbinus

d. Escherichia coli

19 / 30

19) Epstein-Barr Virus (EBV)?

a. Betaherpesvirus subfamily of herpesviruses

b. Cause of infectious mononucleosis

c. Achieves latency in sensory ganglia

d. Group A infect: skin and mucous membranes

20 / 30

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

a. Short rods, but often pleomorphic

b. It causes chronic granulomatous infections

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

d. It is a eukaryote

21 / 30

21) Fusobacterium Nucleatum 😕

a. Implicated in Dental caries

b. Cause scarlet fever

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

d. Black pigmented Gram-negative microorganism

22 / 30

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

a. Poliomyelitis

b. A. Measles

c. Mumps

d. Rubella

23 / 30

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

a. Microaerophilic

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

c. Black pigmented Gram-positive

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

24 / 30

24) Primary herpesvirus infections may cause:?

a. Herpes zoster

b. Herpetic gingivostomatitis

c. Meningititis

d. Herpes labialis

25 / 30

25) Coxsakievirus have been found to replicate in the?

a. Sensory nerve

b. Small bowel

c. Reticuloendothelial system

d. Submucosal lymph tissue

26 / 30

26) Porphyromonas gingivalis:?

a. Are isolated from many extra oral sites

b. Are non-capsulated

c. Are aggressive periodontal pathogens

d. Are Gram-positive pleomorphic rods

27 / 30

27) 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 Streptococcus mutans

d. Fusobacterium nucleatum and Spirochetes

28 / 30

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

a. Cytotoxins

b. Proteases, haemolysin and collagenase

c. Hyaluronic acid

d. Adhesins

29 / 30

29) Causative agent of scarlet fever?

a. Streptococcus viridans

b. Staphylococcus aureus

c. None of these

d. Streptococcus pyogens

30 / 30

30) During AIDS, HIV infects?

a. CD3 lymphocytes

b. B Lymphocytes

c. CD2 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