Oral Microbiology Test

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1 / 60

សារធាតុណាខ្លះដែលប្រឆាំង និងការរីកលូតលាស់របស់បាក់តេរី?

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

b. សារធាតុនៃ ពួក Antiseptique ខ្សោយ

c. សារធាតុនៃ ពួក Antiseptique ខ្លាំង

d. សារធាតុនៃ ពពួក Antiseptique

2 / 60

Anaérobies strictes គឺពពួកបាក់តេរីដែលអាចរស់ និងលូតលាស់បានទាល់តែ?

a. មានខ្យល់ O2 តិច

b. មានខ្យល់ O2ច្រើន

c. មានខ្យល់ O2 ល្មម

d. គ្មានខ្យល់ O2 សោះ

3 / 60

បរិមាណចំណីអាហារសំរាប់ទ្រទ្រង់ជីវិតបាក់តេរីហៅថា?

a. Ration totale

b. Ration d’entretien

c. ration de crosissance and Ration d’entretien

d. ration de crosissance

4 / 60

ពពួកបាក់តេរីដែលគ្មាន peptide-glycane តែមាន enveloppe externe និងភ្នាសcytoplasmique ហៅថា ?

a. Mycoplasme

b. Protoplastes

c. Mésophile

d. Sphéroplaste

5 / 60

ក្នុងការជ្រាបចូលនៃចំណីអាហាររបស់បាក់តេរី perméase មានប៉ុន្មានប្រភេទ ?

a. 6ប្រភេទ

b. 5ប្រភេទ

c. 3ប្រភេទ

d. 4ប្រភេទ

6 / 60

ការជ្រាបចូលនៃសារធាតុ និងចំណីអាហាររបស់បាក់តេរី កាលណាសារធាតុជា forme complex មុននិងបាក់តេរីយកទៅប្រើប្រាស់បានត្រូវរងការបំបែកដោយexoenzyme ជាមុនសិន សារធាតុទាំងនោះមាន?

a. Polymère, ATP ,Vitamine

b. Base pyruvique ,Vitamine, ATP

c. Polymére , acide amine, ATP

d. Protéine , polymére, polyose

7 / 60

ពួកបាក់តេរី pseudomonas អាចរស់នៅក្នុង milieu ?

a. milieu base

b. All are corrects

c. milieu acide + base

d. milieu acide

8 / 60

ក្នុងការជ្រាបចូលនៃសារធាតុនិងចំណីអាហាររបស់បាក់តេរីប្រភេទ perméase មាន?

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

b. Perméase á sucre , Perméase á glucose

c. Perméase á protein , perméase á acide amines

d. Perméase á ions

9 / 60

បាក់តេរីខ្លះមិនបង្កអោយមានជំងឺ ( non pathogéne ) អាចរស់នៅក្នុងmilieu?

a. milieu base

b. milieu acide

c. milieu base ក៏បាន acide ក៏បាន

d. milieu acide + base

10 / 60

បាក់តេរីមានរូបរាងមូលដ្ឋានបីបែប?

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

b. Complex Helical,Bacillus(rods)

c. Helical, Icosahedral, Complex

d. Spirillum (spirals ), Coccus (sphere) ,Bacillus(rods)

11 / 60

Paroi bactérie gram positif មានលក្ខណៈ?

a. ស្តើង មិនជ្រាបអាល់កុល ហើយ bactérie ពណ៍ស្វាយ

b. ក្រាស់ អាចជ្រាបអាល់កុល bactérie ពណ៍ស្វាយ

c. ក្រាស់ មិនអាចជ្រាបអាល់កុល ហើយ bactérie ពណ៍ស្វាយ

d. ក្រាស់ មិនអាចជ្រាបអាល់កុល ហើយ bactérie ពណ៍ក្រហម

12 / 60

ការជ្រាបចូលនៃសារធាតុនិង ចំណីអាហាររបស់បាក់តេរី កាលណាវាជា forme simple អាចជ្រាប ចូលដោយត្រង់ៗដូចជាសារធាតុ?

a. Acetyl-CoA

b. Acide amine , ជាតិស្ករ

c. ATP , glucose

d. glucose, ATP ,Acide amine

13 / 60

Micro-aérophile គឺជាពពួកបាក់តេរីដែលត្រូវការ?

a. ខ្យល់ O2 តិចក៏បាន ច្រើើនក៏បាន

b. មានខ្យល់ O2 តិច

c. មានខ្យល់ O2 ច្រើន

d. មិនត្រូវខ្យល់ O2

14 / 60

Which of the following statements on dental caries are true?

a. approximately 90% of people over 60 years in the West have root surface caries

b. fissure caries is commonly seen in the lingual surface of the incisors

c. recurrent caries is commonly associated with an existing restoration.

d. signs of fissure caries can be first detected in dentine

15 / 60

Gram staining reflects in bacteria?

a. differences in bacterial metabolism

b. differences in the bacterial plasmatic membrane

c. differences in the cell wall structure

d. presence or absence of nucleus.

16 / 60

Which of the following vaccines would you recommend to your new female dental surgery assistant starting work with you?

a. Hepatitis B immunoglobulin

b. Hepatitis C.

c. Hepatitis A

d. Measles–mumps–rubella (MMR)

17 / 60

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

a. Porphyromonas gingivalis

b. Prevotella intermedia.

c. Streptococcus sanguinis

d. Aggregatibacter actinomycetemcomitans

18 / 60

Which of the following statements on clinical sign of chronic periodontitis is INEXACTE?

a. Inflamed, red, shiny and bleeding gingivae.

b. Gross gingival inflammation, fibrosis and some shrinkage

c. Irregular alveolar bone loss around teeth

d. Tooth mobility and migration

19 / 60

In dentoalveolar abscess, the bacteria reach pulp by:?

a. Traumatic exposure during dental treatment

b. Poor oral hygiene

c. Plaque microorganisms

d. Primary herpetic gingivostomatitis.

20 / 60

The mutans group of streptococci are key cariogenic pathogens. Which of the following belongs to the mutans group?

a. Streptococcus saprophyticus

b. Streptococcus pneumonia.

c. Streptococcus pyogenes

d. Streptococcus mutans

21 / 60

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

a. Streptococcus milleri

b. Actinomyces viscsus

c. Streptococcus sanguinis

d. Actinomyces israelii.

22 / 60

Viruses that persist in the cell and cause recurrent disease are considered?

a. resistant.

b. cytopathic

c. latent

d. oncogenic

23 / 60

The organisms which can grow best in the presence of a low concentration of oxygen?

a. Aerobic

b. Aerophilic

c. Anaerobic.

d. Microaerophilic

24 / 60

Communicable diseases can spread by several methods. Which is not an example of the direct transmission mode of disease spread?

a. Transfusion

b. Sexual intercourse

c. Contact with contaminated food

d. Placental transfer.

25 / 60

Which of the following statements on chronic periodontitis is INEXACTE?

a. Most prevalent disease globally

b. Prevalence and severity decrease with age

c. Morbidity 70–80%

d. 95% of all periodontal diseases.

26 / 60

Normal flora help protect the body from pathogens … ?

a. by attacking pathogenic bacteria

b. by sharing plasmids with pathogenic bacteria

c. by secreting histamines.

d. by competing with other bacteria

27 / 60

Caries, all are true except:?

a. Smooth surface caries occur due to streptococcus mutans

b. Fluorides help in reducing caries incidence.

c. Lactobacillus is the main causative organism in plaque

d. Pit and fisssure caries can be prevented by using pit and fissure sealants

28 / 60

Which of the following procedures can be regarded as optimal for controlling cross infection in a dental clinic?

a. Wearing a single face mask for 3 h

b. Wearing gloves after removal of all hand jewellery.

c. Washing the gloves and reusing after visual examination of a patient

d. Wearing headgear for all operational procedures

29 / 60

Initiation of dental caries depends upon:?

a. formation of large amount of acid

b. availability of carbohydrate food

c. viscosity of saliva

d. Localisation of acid over tooth surface.

30 / 60

Which of the following statements on clinical sign of dental caries is INEXACTE?

a. Pseudomembrane (slough)

b. Roughened and cavitation

c. Chalkywhite lesion

d. White-spot lesion.

31 / 60

Dentoalveolar abscess is treated by:?

a. Gingivoplasty

b. Gingivectomy

c. Drainage through the gingival sulcus or by an external incision.

d. Periodontal flap procedure

32 / 60

Which of the following statements on aggressive periodontitis is EXACTE?

a. 95% of all periodontal diseases.

b. Most prevalent disease globally

c. Prevalence and severity decrease with age

d. Initiation is onset of puberty

33 / 60

The human body provides a favorable habitat for microorganisms. Which of the following does not contribute to this favorable habitat?

a. Relatively stable pH.

b. Constant source of nourishment

c. Low levels of moisture

d. Stable temperature

34 / 60

Chronic periodontitis is characterized by INEXACT:?

a. gingival recession

b. tooth mobility and migration

c. systemic symptoms like fever

d. absence of pain in general.

35 / 60

The main causative agent of Ludwig’s angina is:?

a. Legionella infection

b. Group A streptococci.

c. Porphyromonas

d. Staphylococci

36 / 60

Probiotics exhibit all BUT the following characteristics:?

a. Have beneficial effect on host.

b. Remain viable for a long time

c. Mimic antibiotics

d. Nontoxic and nonpathogenic to host

37 / 60

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

a. Streptococcus sanguinis

b. Actinomyces viscsus

c. Prevotella intermedia.

d. Porphyromonas gingivalis

38 / 60

The primary cause of periodontal diseases is?

a. Malocclusion

b. Restoration.

c. Calculus

d. Dental Plaque

39 / 60

Which of the following statements on dentoalveolar abscess is true?

a. it is a infection of sublingual and submandibular spaces

b. it often resolves without antibiotics after adequate drainage.

c. it is frequently implicated as a cause of brain abscess

d. it is often precipitated by bacteria from the systemic route (anachoresis)

40 / 60

What is the cause of death in Ludwig angina?

a. Pneumonia

b. Asphyxia

c. Wall rupture.

d. Dysrhythmia

41 / 60

Fusobacterium Nucleatum 😕

a. Cause scarlet fever

b. Implicated in Dental caries

c. Black pigmented Gram-negative microorganism

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

42 / 60

Mumps virus is belonging to?

a. None of these

b. Paramyxoviridae

c. Retroviriae

d. Orthomyxoviridae

43 / 60

Causative agent of scarlet fever?

a. Streptococcus pyogens

b. Streptococcus viridans

c. Staphylococcus aureus

d. None of these

44 / 60

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

a. Streptococcus sorbinus

b. Staphylococcus aureus

c. Staphylococcus epidermidis

d. Escherichia coli

45 / 60

Coxsakievirus have been found to replicate in the?

a. Sensory nerve

b. Reticuloendothelial system

c. Submucosal lymph tissue

d. Small bowel

46 / 60

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

47 / 60

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

48 / 60

Specificity of Anaerobic bacteria, except:?

a. Incubation culture in 1-2 days

b. Black pigmentation on culture

c. Foul odor when opening anaerobic jar or bag

d. Grow on anaerobic media culture

49 / 60

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

50 / 60

Microorganisms in oral tissue can cause 😕

a. Both, local and systemic infection

b. Local infection

c. Systemic infection

d. Only local infection

51 / 60

Infection in oral cavity by oral flora, which proposition is inexact?

a. Changes in the immune system

b. Administration of antibiotics

c. Changes in salivary flow

d. Changes in exposure to antiseptic

52 / 60

A bacterium from buccal mucosa that can cause lung infection in chronic obstructive pulmonary infections in cystic fibrosis patients is:?

a. Klebsiella pneumoniae

b. Pseudomonas aeruginosa

c. Streptococcus pneumoniae

d. Mycobacterium tuberculosis

53 / 60

Dental caries, which answer is incorrect?

a. Multifunctional microbial disease

b. Characterized by demineralization of the inorganic portion

c. Increased of the organic substance of the tooth

d. Calcified tissues of the teeth

54 / 60

A major bacteria that is responsible in facilitating adhesion by other bacteria is:?

a. Enterococcus stains

b. Staphylococcus stains

c. Fusobacterium nucleatum

d. Streptococcus strains

55 / 60

Bacteria usually cause Pericoronitis?

a. Borrelia vincentii, Bacterioides, Provetella and Eikenella corrodens

b. Fusiform bacillus, Eikenella corrodens, Alpha-hemolytic Streptococci and Capnocytophaga sputigena

c. Fusiform bacillus , Provetella, Eikenella corrodens and Capnocytophaga sputigen

d. Alpha-hemolytic Streptococci, Provetella, Bacterioides and Capnocytophaga

56 / 60

Infections of the mucosa are more usually associated with transient oral bacteria, which one is incorrect?

a. Enterococcus

b. Pseudomonas

c. Staphylococcus

d. Helicobacter

57 / 60

A bacterium that is usually found in tongue 😕

a. Streptococcus pneumoniae

b. Staphylococcus epidemidis

c. Streptococcus mitis

d. Clostridium difficile

58 / 60

Major bacteria usually cause dental caries:?

a. Mutans Streptococci, Lactobacilli, Actinomyces vicosus

b. Mutans Streptococci, Staphylococcus aureus, Actinomyces vicosus

c. Mutans Streptococci, Lactobacilli, Clostridium

d. Streptococcus pneumoniae, Lactobacilli, Actinomyces vicosus

59 / 60

A bacterium that spread from lung infection and cause oral lesions with clinical sign include fever, chills, fatigue and malaise, weight loss, and persistent cough 😕

a. Streptococcus pneumoniae

b. Pseudomonas aeruginosa

c. Klebsiella pneumoniae

d. Mycobacterium tuberculosis

60 / 60

Strategy to control of rendox potential in oral biofilm:?

a. Inhibition of key microbial enzyme

b. Fluoride

c. Stimulate base production

d. Oxygenating agents

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និស្សិតអាចប្រាប់មកកាន់ពួកយើងបានដើម្បីកែកំហុស ឬអំពីបញ្ហាដោយអចេតនាណាមួយដែលកើតមានកំឡុងពេលធ្វើតេស្ត