/44 0 Oral Microbiology Preparation (Dr. Hem Sopheak) 1 / 44 1) Microorganisms in oral tissue can cause π a. Only local infection b. Both, local and systemic infection c. Local infection d. Systemic infection 2 / 44 2) Infection in oral cavity by oral flora, which proposition is inexact? a. Changes in the immune system b. Changes in salivary flow c. Changes in exposure to antiseptic d. Administration of antibiotics 3 / 44 3) A bacterium from buccal mucosa that can cause lung infection in chronic obstructive pulmonary infections in cystic fibrosis patients is:? a. Mycobacterium tuberculosis b. Klebsiella pneumoniae c. Streptococcus pneumoniae d. Pseudomonas aeruginosa 4 / 44 4) A bacterium that never found in tooth surface:? a. Streptococcus mitis b. Streptococcus pneumoniae c. Streptococcus anginosus d. Streptococcus mutans 5 / 44 5) Which bacteria that is not always presence in saliva:? a. Streptococcus salivarius b. Streptococcus agalactiae c. Streptococcus mitis d. Streptococcus oralis 6 / 44 6) Principal Cocci Gram negative bacteria found in oral cavity:? a. Streptococcus b. Enterococcus c. Gemella d. Veillonella 7 / 44 7) Steps in order for biofilm formation:? a. Colonization , adhesion, coadhesion , maturation and detachment b. Coadhesion , adhesion, colonization, maturation and detachment c. Adhesion, colonization, coadhesion , maturation and detachment d. Maturation and detachment, adhesion, colonization, coadhesion 8 / 44 8) Antimicrobial against Porphyromonas gingivalis is π a. Vancomycin b. Kanamycin c. Metronidazole d. Erythromycin 9 / 44 9) Dental caries, which answer is incorrect? a. Characterized by demineralization of the inorganic portion b. Increased of the organic substance of the tooth c. Calcified tissues of the teeth d. Multifunctional microbial disease 10 / 44 10) Among 4 phases of biofilm formation, the phase that is done the longest, about 7-14 days is:? a. Phase 1 b. Phase 2 c. Phase 4 d. Phase 3 11 / 44 11) The most common bacterium that is responsible for tonsillitis and pharyngitis is:? a. Streptococcus mitis b. Group-B beta hemolytic Streptococcus ( Streptococcus agalactiae) c. Group-A beta hemolytic Streptococcus ( Streptococcus pyogenses) d. Streptococcus mutans 12 / 44 12) Analytical techniques for monitoring biofilms by βIndirect detectionβ π a. Microscopy techniques b. Detection of proteins by molecular biology technique c. High Pressure Liquid Chromatography (HPLC) d. Detection of DNA by molecular biology technique 13 / 44 13) Strategy to control of biofilm pH in oral biofilm:? a. Fluoride b. Generating nutrients c. Antiflammatory agents d. Inhibition of key microbial enzyme 14 / 44 14) Pathway in order of pathogenesis of oral infection:? a. 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 b. 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 c. 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 d. 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 15 / 44 15) Strategy to control of rendox potential in oral biofilm:? a. Inhibition of key microbial enzyme b. Fluoride c. Oxygenating agents d. Stimulate base production 16 / 44 16) Bacteria usually cause Necrotizing Ulcerative Gingivitis? a. Fusiform bacillus and Borrelia vincentii b. Borrelia vincentii and Porphyromonas endodontalis c. Fusiform bacillus and Capnocytophaga sputigena d. Borrelia vincentii and Eikenella corrodens 17 / 44 17) Biofilm infection is usually found in sites of primary and secondary infection except:? a. Artificial hip implant b. Genital infection c. Mouth d. Subvenous catheter 18 / 44 18) Strategy to control of nutrients in oral biofilm:? a. Antimicrobial agents b. Inhibition of key microbial enzyme c. Stimulate base production d. Fluoride 19 / 44 19) Specificity of Anaerobic bacteria, except:? a. Black pigmentation on culture b. Grow on anaerobic media culture c. Incubation culture in 1-2 days d. Foul odor when opening anaerobic jar or bag 20 / 44 20) Major bacteria usually cause dental caries:? a. Streptococcus pneumoniae, Lactobacilli, Actinomyces vicosus b. Mutans Streptococci, Lactobacilli, Clostridium c. Mutans Streptococci, Staphylococcus aureus, Actinomyces vicosus d. Mutans Streptococci, Lactobacilli, Actinomyces vicosus 21 / 44 21) Major bacteria cause chronic periodontitis:? a. Fusobacterium nucleatum, Porphyromonas endodontalis, Prevotella tannerae, E.coli b. Fusobacterium nucleatum, Porphyromonas endodontalis, Prevotella tannerae, Pseudomonas aeruginosa c. Fusobacterium nucleatum, Porphyromonas endodontalis, Prevotella tannerae, Streptococcus anginosus d. Fusobacterium nucleatum, Porphyromonas endodontalis, Prevotella tannerae,Stphylococcus aureus 22 / 44 22) In dental caries, the pathogenic factor is π a. Good oral hygiene b. Remineralization ( fluoride, Calcium, Phosphate) c. Acid producing bacteria d. Saliva flow and components 23 / 44 23) Among 4 phases of biofilm formation, the phase that is done immediately about 4 hours is:? a. Phase 2 b. Phase 4 c. Phase 3 d. Phase 1 24 / 44 24) Factor that does not influence to dental caries? a. Duration and frequency of exposure b. Substrate for microorganisms c. Size and form of teeth d. Individual factor 25 / 44 25) Major bacteria cause periodontitis π a. Fusobacterium nucleatum, Petostreptococcus micros, Enterococcus, Borrela vincenti b. Fusobacterium nucleatum, Petostreptococcus micros, Streptococci, Pneumococcus c. Fusobacterium nucleatum, E.coli, Streptococci, Borrela vincenti d. Fusobacterium nucleatum, Petostreptococcus micros, Streptococci, Borrela vincenti 26 / 44 26) The most common bacteria that are always presence in mouth as a normal flora, which proposition is inexact? a. D. Gonococcus b. C. Prevotella c. A. Streptococcus d. B. Actinomyces 27 / 44 27) Major bacteria cause aggressive periodontitis? a. Prevotella intermedia, Fusobacterium nucleatum, Porphyromonas endodontalis, Prevotella tannerae b. Eikenella corrodens, Capnocytophaga sputigena, Actinobaccilus actinomycetemcomitans, Prevotella intermedia c. Capnocytophaga sputigena, Fusobacterium nucleatum, Porphyromonas endodontalis, Prevotella tannerae d. Actinobaccilus actinomycetemcomitans, Fusobacterium nucleatum, Porphyromonas endodontalis, Prevotella tannerae 28 / 44 28) Principal Rods Gram positive bacteria found in oral cavity:? a. Eikenella b. Simonsiella c. Prevotella d. Actinomyces 29 / 44 29) Oral opportunistic infection happens when:? a. An organism that usually is pathogenic causes disease b. An organism that usually is pathogenic becomes normal flora c. An organism that usually is nonpathogenic causes disease d. An organism that usually is nonpathogenic has no opportunity to cause disease 30 / 44 30) Principal Cocci Gram positive bacteria found in oral cavity:? a. Peptostreptococcus b. Moraxella c. Veillonella d. Neisseria 31 / 44 31) A bacterium that is usually found in tongue π a. Streptococcus mitis b. Streptococcus pneumoniae c. Clostridium difficile d. Staphylococcus epidemidis 32 / 44 32) On tooth surface, bacteria that participate actively in adhesion of primary colonizers? a. Enterococcus stains b. Pseudomonas stains c. Staphylococcus stains d. Streptococcus stains 33 / 44 33) In dental caries, the protective factor is π a. Frequent eating / drinking of fermentable carbohydrates b. Antibacterials ( fluorides, Chlorhexidine, Xylitol) c. Poor oral hygiene d. Acid producing bacteria 34 / 44 34) Analytical techniques for monitoring biofilms by βDirect detectionβ π a. High Pressure Liquid Chromatography (HPLC) b. Inductively Coupled Plasma Mass Spectrometry (ICP-MS) c. Microscopy techniques d. Gas Chromatography – Mass Spectrometry (GC-MS) 35 / 44 35) 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 π a. Klebsiella pneumoniae b. Mycobacterium tuberculosis c. Pseudomonas aeruginosa d. Streptococcus pneumoniae 36 / 44 36) Antibiotic which is common use to treat anaerobic bacteria π a. Colistin b. Gentamicin c. Metronidazole d. Vancomycin 37 / 44 37) Diseases are always found in oral cavity, except π a. Gonococci b. Syphilis c. Typhoid fever d. Tuberculosis 38 / 44 38) Steps in order to perform bacteriological diagnostic of oral microbiology:? a. Antimicrobial Susceptibility testing, Direct examination , Gram stain, Culture , Identification , b. Identification , Direct examination , Gram stain, Culture , Antimicrobial Susceptibility testing c. Direct examination , Gram stain, Culture , Identification , Antimicrobial Susceptibility testing d. Direct examination , Gram stain, Antimicrobial Susceptibility testing, Culture , Identification , 39 / 44 39) Which bacteria that is not presence in buccal mucosa? a. Streptococcus mutans b. Streptococcus anginosus c. Streptococcus mitis d. Treponema palidum 40 / 44 40) Principal Rods Gram negative bacteria found in oral cavity:? a. Porphyromonas b. Corynebacterium c. Lactobacillus d. Eubacterium 41 / 44 41) Infections of the mucosa are more usually associated with transient oral bacteria, which one is incorrect? a. Pseudomonas b. Helicobacter c. Enterococcus d. Staphylococcus 42 / 44 42) A major bacteria that is responsible in facilitating adhesion by other bacteria is:? a. Fusobacterium nucleatum b. Enterococcus stains c. Streptococcus strains d. Staphylococcus stains 43 / 44 43) Bacteria usually cause Pericoronitis? a. Alpha-hemolytic Streptococci, Provetella, Bacterioides and Capnocytophaga b. Borrelia vincentii, Bacterioides, Provetella and Eikenella corrodens c. Fusiform bacillus , Provetella, Eikenella corrodens and Capnocytophaga sputigen d. Fusiform bacillus, Eikenella corrodens, Alpha-hemolytic Streptococci and Capnocytophaga sputigena 44 / 44 44) The comment bacterium causes dental caries:? a. Pseudomonas aeruginosa b. Staphylococcus aureus c. Mutans Streptococci d. E.coli Your score isThe average score is 0% Facebook 0% Restart quiz Any comments? 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