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