/44 130 Oral Microbiology Preparation (Dr. Hem Sopheak) 1 / 44 1) 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 2 / 44 2) Factor that does not influence to dental caries? a. Substrate for microorganisms b. Individual factor c. Duration and frequency of exposure d. Size and form of teeth 3 / 44 3) Steps in order for biofilm formation:? a. Adhesion, colonization, coadhesion , maturation and detachment b. Colonization , adhesion, coadhesion , maturation and detachment c. Maturation and detachment, adhesion, colonization, coadhesion d. Coadhesion , adhesion, colonization, maturation and detachment 4 / 44 4) Which bacteria that is not always presence in saliva:? a. Streptococcus salivarius b. Streptococcus agalactiae c. Streptococcus oralis d. Streptococcus mitis 5 / 44 5) 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 6 / 44 6) Which bacteria that is not presence in buccal mucosa? a. Treponema palidum b. Streptococcus anginosus c. Streptococcus mutans d. Streptococcus mitis 7 / 44 7) Microorganisms in oral tissue can cause π a. Local infection b. Both, local and systemic infection c. Systemic infection d. Only local infection 8 / 44 8) The comment bacterium causes dental caries:? a. E.coli b. Mutans Streptococci c. Staphylococcus aureus d. Pseudomonas aeruginosa 9 / 44 9) Infection in oral cavity by oral flora, which proposition is inexact? a. Changes in salivary flow b. Changes in exposure to antiseptic c. Administration of antibiotics d. Changes in the immune system 10 / 44 10) Among 4 phases of biofilm formation, the phase that is done the longest, about 7-14 days is:? a. Phase 4 b. Phase 3 c. Phase 2 d. Phase 1 11 / 44 11) Analytical techniques for monitoring biofilms by βDirect detectionβ π a. Microscopy techniques b. Inductively Coupled Plasma Mass Spectrometry (ICP-MS) c. High Pressure Liquid Chromatography (HPLC) d. Gas Chromatography – Mass Spectrometry (GC-MS) 12 / 44 12) Steps in order to perform bacteriological diagnostic of oral microbiology:? a. Antimicrobial Susceptibility testing, Direct examination , Gram stain, Culture , Identification , b. Direct examination , Gram stain, Antimicrobial Susceptibility testing, Culture , Identification , c. Identification , Direct examination , Gram stain, Culture , Antimicrobial Susceptibility testing d. Direct examination , Gram stain, Culture , Identification , Antimicrobial Susceptibility testing 13 / 44 13) Oral opportunistic infection happens when:? a. An organism that usually is nonpathogenic has no opportunity to cause disease b. An organism that usually is pathogenic becomes normal flora c. An organism that usually is pathogenic causes disease d. An organism that usually is nonpathogenic causes disease 14 / 44 14) Principal Cocci Gram positive bacteria found in oral cavity:? a. Neisseria b. Veillonella c. Peptostreptococcus d. Moraxella 15 / 44 15) Strategy to control of rendox potential in oral biofilm:? a. Inhibition of key microbial enzyme b. Oxygenating agents c. Fluoride d. Stimulate base production 16 / 44 16) 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. 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 c. 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 d. 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 17 / 44 17) A bacterium from buccal mucosa that can cause lung infection in chronic obstructive pulmonary infections in cystic fibrosis patients is:? a. Pseudomonas aeruginosa b. Mycobacterium tuberculosis c. Streptococcus pneumoniae d. Klebsiella pneumoniae 18 / 44 18) A major bacteria that is responsible in facilitating adhesion by other bacteria is:? a. Fusobacterium nucleatum b. Staphylococcus stains c. Streptococcus strains d. Enterococcus stains 19 / 44 19) A bacterium that never found in tooth surface:? a. Streptococcus anginosus b. Streptococcus mutans c. Streptococcus mitis d. Streptococcus pneumoniae 20 / 44 20) On tooth surface, bacteria that participate actively in adhesion of primary colonizers? a. Enterococcus stains b. Pseudomonas stains c. Streptococcus stains d. Staphylococcus stains 21 / 44 21) The most common bacterium that is responsible for tonsillitis and pharyngitis is:? a. Streptococcus mutans b. Streptococcus mitis c. Group-B beta hemolytic Streptococcus ( Streptococcus agalactiae) d. Group-A beta hemolytic Streptococcus ( Streptococcus pyogenses) 22 / 44 22) Analytical techniques for monitoring biofilms by βIndirect detectionβ π a. High Pressure Liquid Chromatography (HPLC) b. Detection of DNA by molecular biology technique c. Detection of proteins by molecular biology technique d. Microscopy techniques 23 / 44 23) Antimicrobial against Porphyromonas gingivalis is π a. Vancomycin b. Erythromycin c. Kanamycin d. Metronidazole 24 / 44 24) Dental caries, which answer is incorrect? a. Multifunctional microbial disease b. Calcified tissues of the teeth c. Increased of the organic substance of the tooth d. Characterized by demineralization of the inorganic portion 25 / 44 25) Infections of the mucosa are more usually associated with transient oral bacteria, which one is incorrect? a. Pseudomonas b. Enterococcus c. Staphylococcus d. Helicobacter 26 / 44 26) In dental caries, the pathogenic factor is π a. Remineralization ( fluoride, Calcium, Phosphate) b. Saliva flow and components c. Good oral hygiene d. Acid producing bacteria 27 / 44 27) Major bacteria cause periodontitis π a. Fusobacterium nucleatum, Petostreptococcus micros, Streptococci, Pneumococcus b. Fusobacterium nucleatum, Petostreptococcus micros, Enterococcus, Borrela vincenti c. Fusobacterium nucleatum, E.coli, Streptococci, Borrela vincenti d. Fusobacterium nucleatum, Petostreptococcus micros, Streptococci, Borrela vincenti 28 / 44 28) Principal Cocci Gram negative bacteria found in oral cavity:? a. Veillonella b. Enterococcus c. Gemella d. Streptococcus 29 / 44 29) Major bacteria cause aggressive periodontitis? a. Eikenella corrodens, Capnocytophaga sputigena, Actinobaccilus actinomycetemcomitans, Prevotella intermedia b. Prevotella intermedia, Fusobacterium nucleatum, Porphyromonas endodontalis, Prevotella tannerae c. Capnocytophaga sputigena, Fusobacterium nucleatum, Porphyromonas endodontalis, Prevotella tannerae d. Actinobaccilus actinomycetemcomitans, Fusobacterium nucleatum, Porphyromonas endodontalis, Prevotella tannerae 30 / 44 30) Strategy to control of nutrients in oral biofilm:? a. Inhibition of key microbial enzyme b. Stimulate base production c. Antimicrobial agents d. Fluoride 31 / 44 31) Biofilm infection is usually found in sites of primary and secondary infection except:? a. Subvenous catheter b. Genital infection c. Mouth d. Artificial hip implant 32 / 44 32) Major bacteria cause chronic periodontitis:? a. Fusobacterium nucleatum, Porphyromonas endodontalis, Prevotella tannerae, Streptococcus anginosus b. Fusobacterium nucleatum, Porphyromonas endodontalis, Prevotella tannerae,Stphylococcus aureus c. Fusobacterium nucleatum, Porphyromonas endodontalis, Prevotella tannerae, Pseudomonas aeruginosa d. Fusobacterium nucleatum, Porphyromonas endodontalis, Prevotella tannerae, E.coli 33 / 44 33) Antibiotic which is common use to treat anaerobic bacteria π a. Vancomycin b. Gentamicin c. Colistin d. Metronidazole 34 / 44 34) 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. Mycobacterium tuberculosis b. Streptococcus pneumoniae c. Pseudomonas aeruginosa d. Klebsiella pneumoniae 35 / 44 35) Strategy to control of biofilm pH in oral biofilm:? a. Antiflammatory agents b. Inhibition of key microbial enzyme c. Fluoride d. Generating nutrients 36 / 44 36) 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 37 / 44 37) Principal Rods Gram positive bacteria found in oral cavity:? a. Actinomyces b. Simonsiella c. Prevotella d. Eikenella 38 / 44 38) In dental caries, the protective factor is π a. Acid producing bacteria b. Antibacterials ( fluorides, Chlorhexidine, Xylitol) c. Poor oral hygiene d. Frequent eating / drinking of fermentable carbohydrates 39 / 44 39) 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. B. Actinomyces d. A. Streptococcus 40 / 44 40) Bacteria usually cause Necrotizing Ulcerative Gingivitis? a. Fusiform bacillus and Capnocytophaga sputigena b. Fusiform bacillus and Borrelia vincentii c. Borrelia vincentii and Porphyromonas endodontalis d. Borrelia vincentii and Eikenella corrodens 41 / 44 41) Diseases are always found in oral cavity, except π a. Syphilis b. Typhoid fever c. Tuberculosis d. Gonococci 42 / 44 42) Principal Rods Gram negative bacteria found in oral cavity:? a. Lactobacillus b. Corynebacterium c. Porphyromonas d. Eubacterium 43 / 44 43) Major bacteria usually cause dental caries:? a. Mutans Streptococci, Lactobacilli, Clostridium b. Streptococcus pneumoniae, Lactobacilli, Actinomyces vicosus c. Mutans Streptococci, Staphylococcus aureus, Actinomyces vicosus d. Mutans Streptococci, Lactobacilli, Actinomyces vicosus 44 / 44 44) A bacterium that is usually found in tongue π a. Staphylococcus epidemidis b. Streptococcus mitis c. Clostridium difficile d. Streptococcus pneumoniae Your score isThe average score is 87% Facebook 0% Restart quiz Any comments? 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