Oral Microbiology Test – testnisset.com

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Oral Microbiology Test

1 / 59

Causative agent of scarlet fever?

a. Staphylococcus aureus

b. Streptococcus pyogens

c. None of these

d. Streptococcus viridans

2 / 59

Herpagina is usually cause by?

a. Cytomegalovirus

b. Hepatitis A virus

c. Group A coxsackieviruses

d. Group B coxackieviruses

3 / 59

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

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

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

c. Black pigmented Gram-positive

d. Microaerophilic

4 / 59

Epstein-Barr Virus (EBV)?

a. Cause of infectious mononucleosis

b. Achieves latency in sensory ganglia

c. Group A infect: skin and mucous membranes

d. Betaherpesvirus subfamily of herpesviruses

5 / 59

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

a. Poliomyelitis

b. Rubella

c. A. Measles

d. Mumps

6 / 59

Mumps virus is belonging to?

a. None of these

b. Orthomyxoviridae

c. Paramyxoviridae

d. Retroviriae

7 / 59

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.

8 / 59

Which of the following statement on Actinobacillus actinomycetemcomitans are true?

a. Aggressive forms of dental caries in adolescents

b. Non-capsulate diplococcic

c. cigar-shaped bacilli

d. Aggressive forms of periodontal disease in adolescents

9 / 59

The organisms most commonly associated with root caries are ?

a. Porphyromonas gingivalis

b. Actinomyces viscosus

c. Fusobacterium Nucleatum

d. Staphylococcus aureus

10 / 59

Which of the following bacteria that is predominant in chronic periodontitis?

a. Porphyromonas gingivalis

b. Streptococcus sanguinis

c. Prevotella intermedia.

d. Actinomyces viscsus

11 / 59

Which of the following is associated with dental caries?

a. Streptococcus pneumonia

b. Streptococcus mutans

c. Staphylococcus aureus.

d. Lactococcus lactis

12 / 59

Which of the following statements on aggressive periodontitis is EXACTE?

a. Most prevalent disease globally

b. 95% of all periodontal diseases.

c. Initiation is onset of puberty

d. Prevalence and severity decrease with age

13 / 59

Widely accepted theory of dental caries is 😕

a. Autoimmune theory.

b. Proteolytic theory

c. Proteolytic chelation theory

d. Acidogenic theory

14 / 59

Mouthwashes used for controlling oral malodor should contain?

a. Xylitol.

b. Antibacterial agent

c. Alcohol

d. Sugar to make them more palatable to consumers

15 / 59

Normal flora help protect the body from pathogens … ?

a. by secreting histamines.

b. by sharing plasmids with pathogenic bacteria

c. by attacking pathogenic bacteria

d. by competing with other bacteria

16 / 59

Demineralization of inorganic portion and destruction of organic of tooth is known as:?

a. Pulpitis.

b. Enamel caries

c. Dentinal caries

d. Dental caries

17 / 59

Viruses can be cultivated in?

a. Tissue culture

b. Lab media

c. Broth

d. Blood culture.

18 / 59

Probiotics exhibit all BUT the following characteristics:?

a. Nontoxic and nonpathogenic to host

b. Have beneficial effect on host.

c. Remain viable for a long time

d. Mimic antibiotics

19 / 59

Which genus of bacterium contributes to plaque, caries, gingivitis, and periodontal disease?

a. Staphylococcus

b. Streptococcus

c. Escherichia

d. Bacillus.

20 / 59

Which of the following statements on the natural history of periodontal disease is INEXACT?

a. facultative anaerobes predominate in gingivitis.

b. the proportion of Gram positive rods decreases to nearly 5% in chronic marginal gingivitis

c. Gram-positive cocci predominate in healthy gingival crevice

d. Gram-negative anaerobes predominate in chronic periodontitis

21 / 59

Which of the following statements on diagnosis of dental caries is INEXACTE?

a. Electrical impedance

b. Laser fluorescence

c. Probing

d. Organoleptic assessment.

22 / 59

Which is not true about Ludwig angina?

a. Maintain fluid balance.

b. Involves submandibular space

c. Caused by an acute or chronic destructive process in periodontium

d. May need emergency tracheostomy

23 / 59

Which of the following statements on periodontal disease is INEXACT?

a. Can be controlled by using mechanical cleansing techniques.

b. One of major diseases afflicting humankind

c. Manage by restoration

d. Disorders of supporting structures of teeth

24 / 59

What is the cause of death in Ludwig angina?

a. Pneumonia

b. Wall rupture.

c. Dysrhythmia

d. Asphyxia

25 / 59

Which of the following disease most commonly afflicts human?

a. Ludwig’s angina

b. Dentoalveolar abscess

c. Periodontal disease

d. Periodontal abscess.

26 / 59

The most common protozoa in the oral cavity of people ?

a. Giardia lamblia.

b. Giardia muris

c. Entamoeba histolytica

d. Trichomonas tenax

27 / 59

Predisposing factors for acute necrotizing ulcerative gingivitis include INEXACT:?

a. severe malnutrition

b. diabetes.

c. heavy smoking

d. immunodeficiency

28 / 59

Microorganisms play the most essential role.?

a. Streptococcus anginosus.

b. Streptococcus bovis

c. Dental caries is associated with:

d. Streptococcus mutans

e. Streptococcus agalactiae

29 / 59

A facultative anaerobic is:?

a. Only grow in the presence of O2

b. Ordinarily an aerobe but can grow in absence of O2.

c. Only grow anaerobically

d. Ordinarily an anaerobe but can grow with O2

30 / 59

Initiation of dental caries depends upon:?

a. Localisation of acid over tooth surface.

b. formation of large amount of acid

c. viscosity of saliva

d. availability of carbohydrate food

31 / 59

Which of the following bacteria that is predominant in healthy condition?

a. Actinomyces israelii.

b. Actinomyces viscsus

c. Streptococcus sanguinis

d. Streptococcus milleri

32 / 59

How to manage dental caries?

a. Institute surgical drainage.

b. Initial local debridement with ultrasonic scaling

c. Minimal cavity preparation techniques

d. Eliminate primary source of infection

33 / 59

In dentoalveolar abscess, the bacteria reach pulp by:?

a. Primary herpetic gingivostomatitis.

b. Poor oral hygiene

c. Traumatic exposure during dental treatment

d. Plaque microorganisms

34 / 59

Microorganisms that are frequently implicated in the pathogenesis of periodontal abscess include:?

a. Treponema pallidum

b. Staphylococci

c. Streptococcus pneumonia

d. Porphyromonas spp.

35 / 59

ពពួកបាក់តេរីដែលគ្មាន peptide-glycane តែមាន enveloppe externe និងភ្នាសcytoplasmique ហៅថា ?

a. Mésophile

b. Sphéroplaste

c. Protoplastes

d. Mycoplasme

36 / 59

សេចក្តីត្រូវការផ្នែកថាមពល ( besoins énergétique )សំរាប់ធ្វើសំយោគម៉ូលេគុលដែលជា សារធាតុសំខាន់ក្នុងការបង្កើតថាមពលរបស់បាក់តេរី?

a. carbone , Phosphore , Calcium, ជាតិស្ករ

b. carbone , Phosphore , Calcium

c. ATP , ជាតិស្ករ , Calcium , O2

d. ជាតិស្ករ ,ATP , A cétyl co-A , Glucose-6 Phosphate

37 / 59

សេចក្តីត្រូវការផ្នែករូបធាតុក្នុងតំរូវការតិចមាន?

a. S . P . Fe

b. Ca . Mg . K

c. Ca , Mg , K, S , P , Fe

d. C. H . O2 .Z

38 / 59

សារធាតុណាខ្លះដែលប្រឆាំង និងការរីកលូតលាស់របស់បាក់តេរី?

a. សារធាតុនៃ ពួក Antiseptique ខ្សោយ

b. សារធាតុនៃ ពួក Antiseptique ខ្លាំង

c. សារធាតុនៃ ពពួក Antiseptique

d. សារធាតុនៃ ពួក antibiotique,នៃ ពពួក Antiseptique ខ្លាំង ,ខ្សោយ and សារធាតុនៃ ពួក Antiseptique ខ្សោយ

39 / 59

បរិមាណចំណីអាហារសំរាប់សាងសង់និង ដើម្បីថាមពលហៅថា?

a. Ration d’entretien and Ration totale

b. Ration d’entretien

c. ration de croissance

d. Ration totale

40 / 59

ដើម្បីរស់ បាក់តេរីការចំណីអាហារប៉ុន្មានភាគរយ នៃ Ration totale សំរាប់ការរស់នៅក្នុងធម្មជាតិ?

a. 1/600

b. 1/300

c. 1/500

d. 1/400

41 / 59

បាក់តេរី Doderlein អាចរស់នៅក្នុង milieu?

a. milieu acide

b. milieu alcalin

c. milieu acide + base

d. milieu base

42 / 59

បាក់តេរីដែលធ្វើអោយពុលដល់ចំណីអាហារកំប៉ុងឈ្មោះអ្វី ?

a. Pneumcoque

b. Clostridium

c. Streptocoque

d. Staphylocoque

43 / 59

ក្នុងការជ្រាបចូលនៃសារធាតុនិងចំណីអាហាររបស់បាក់តេរីប្រភេទ perméase មាន?

a. Perméase á protein , perméase á acide amines

b. Perméase á ions

c. Perméase á ions (K,PO4, SO4) and Perméase á protein , perméase á acide amines

d. Perméase á sucre , Perméase á glucose

44 / 59

ក្នុងការជ្រាបចូលនៃចំណីអាហាររបស់បាក់តេរី perméase មានប៉ុន្មានប្រភេទ ?

a. 6ប្រភេទ

b. 4ប្រភេទ

c. 5ប្រភេទ

d. 3ប្រភេទ

45 / 59

បរិមាណចំណីអាហារសំរាប់ទ្រទ្រង់ជីវិតបាក់តេរីហៅថា?

a. ration de crosissance

b. Ration totale

c. ration de crosissance and Ration d’entretien

d. Ration d’entretien

46 / 59

នៅក្នុង condition physico-chimique de la croissance របស់បាក់តេរីក្នុងល័ក្ខខណ្ឌ័ Perssions partielles d’oxygène គេបែងចែកបាក់តេរីជាច្រើនប្រភេទ?

a. Aérobies-anaérobie facultative and érobies strictes , Micro-aérophiles, anaérobies stricte

b. Aérobies strictes , Micro-aérophiles, anaérobies stricte

c. Aérobies-anaérobie facultative

d. Mésophile + Micro-aérophiles,anaérobies stricte

47 / 59

បាក់តេរីខ្លះមិនបង្កអោយមានជំងឺ ( non pathogéne ) អាចរស់នៅក្នុងmilieu?

a. milieu base ក៏បាន acide ក៏បាន

b. milieu acide

c. milieu acide + base

d. milieu base

48 / 59

virusមានរូបរាងមូលដ្ឋានបីបែប?

a. Helical, Icosahedral, Complex

b. Icosa,hedral, Complex, Coccus (sphere)

c. Complex Helical,Bacillus(rods)

d. Helical, Icosahedral ,Spirillum (spirals )

49 / 59

បាក់តេរីប្រភេទ cryophile អាចរស់នៅក្នុងរង្វង់សីតុណ្ហភាព?

a. 6 ˚C

b. 10 ˚C

c. 8 ˚C

d. 4 ˚C

50 / 59

បាក់តេរីប្រភេទ Mésophile អាចរស់នៅក្នុងសីតុណ្ហភាព?

a. 10-15 ˚C

b. 40-50 ˚C

c. 10-20 ˚C

d. 20-40 ˚C

51 / 59

Oral opportunistic infection happens when:?

a. An organism that usually is pathogenic causes disease

b. An organism that usually is nonpathogenic causes disease

c. An organism that usually is nonpathogenic has no opportunity to cause disease

d. An organism that usually is pathogenic becomes normal flora

52 / 59

In dental caries, the pathogenic factor is 😕

a. Acid producing bacteria

b. Saliva flow and components

c. Good oral hygiene

d. Remineralization ( fluoride, Calcium, Phosphate)

53 / 59

Analytical techniques for monitoring biofilms by “Direct detection” 😕

a. High Pressure Liquid Chromatography (HPLC)

b. Inductively Coupled Plasma Mass Spectrometry (ICP-MS)

c. Gas Chromatography – Mass Spectrometry (GC-MS)

d. Microscopy techniques

54 / 59

Antimicrobial against Porphyromonas gingivalis is 😕

a. Metronidazole

b. Erythromycin

c. Vancomycin

d. Kanamycin

55 / 59

Major bacteria cause periodontitis 😕

a. Fusobacterium nucleatum, Petostreptococcus micros, Streptococci, Pneumococcus

b. Fusobacterium nucleatum, Petostreptococcus micros, Streptococci, Borrela vincenti

c. Fusobacterium nucleatum, Petostreptococcus micros, Enterococcus, Borrela vincenti

d. Fusobacterium nucleatum, E.coli, Streptococci, Borrela vincenti

56 / 59

Pathway in order of pathogenesis of oral infection:?

a. Pus formation- Entry of bacteria into soft tissue wall or trauma to the orifice – Formation of infiltrate- Destruction of connective tissues- Decrease tissue resistance and increase number of bacteria with virulence

b. Decrease tissue resistance and increase number of bacteria with virulence- Entry of bacteria into soft tissue wall or trauma to the orifice – Formation of infiltrate- Destruction of connective tissues- Pus formation

c. Entry of bacteria into soft tissue wall or trauma to the orifice – Pus formation- Formation of infiltrate – Destruction of connective tissues – Decrease tissue resistance and increase number of bacteria with virulence

d. Entry of bacteria into soft tissue wall or trauma to the orifice – Formation of infiltrate- Destruction of connective tissues- Pus formation- Decrease tissue resistance and increase number of bacteria with virulence

57 / 59

Among 4 phases of biofilm formation, the phase that is done immediately about 4 hours is:?

a. Phase 1

b. Phase 2

c. Phase 3

d. Phase 4

58 / 59

Major bacteria cause chronic periodontitis:?

a. Fusobacterium nucleatum, Porphyromonas endodontalis, Prevotella tannerae, Streptococcus anginosus

b. Fusobacterium nucleatum, Porphyromonas endodontalis, Prevotella tannerae, E.coli

c. Fusobacterium nucleatum, Porphyromonas endodontalis, Prevotella tannerae, Pseudomonas aeruginosa

d. Fusobacterium nucleatum, Porphyromonas endodontalis, Prevotella tannerae,Stphylococcus aureus

59 / 59

Major bacteria usually cause dental caries:?

a. Streptococcus pneumoniae, Lactobacilli, Actinomyces vicosus

b. Mutans Streptococci, Lactobacilli, Clostridium

c. Mutans Streptococci, Lactobacilli, Actinomyces vicosus

d. Mutans Streptococci, Staphylococcus aureus, Actinomyces vicosus

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