Oral Microbiology Test 0% 0 votes, 0 avg 0 You will have 60 minutes to complete all the questions. After the timer reaches 60 minutes, the exam will end and be saved automatically. Good luck! *Fingers crossed* The timer has been reached. The exam has now been terminated and saved. Oral Microbiology Test 1 / 60 Several infections occur in the oral cavity that are of relevance to the dental team. Which of the following infections does virus cause? a. Pericoronitis b. Acute necrotizing ulcerative gingivitis c. Lateral periodontal abcess d. Herpetic stomatitis 2 / 60 During AIDS, HIV infects? a. CD2 lymphocytes b. B Lymphocytes c. CD3 lymphocytes d. CD4 lymphocytes 3 / 60 Which of the following statements on Actinomycetes are not true? a. Short rods, but often pleomorphic b. It causes chronic granulomatous infections c. It infrequently causes actinomycoses of the jaws after tooth extractions d. It is a eukaryote 4 / 60 Various viral infections are of relevance to the dental team, including those that cause disease affecting the head neck region. Which one of the following viruses causes cold sores? a. Herpes zoster b. Paramyxovirus c. Epstein-Barr d. Herpes simplex 5 / 60 Actinobacillus actinomycetemcomitans possesses certain virulence factors that enable it to invade tissues, such as ? a. Streptodornas b. hemolysine c. Hyaluronidase d. leukotoxin A 6 / 60 Main causative organism of chicken pox is? a. Fox virus b. Mumps virus c. Measles virus d. Varicella Zoster virus 7 / 60 Epstein-Barr Virus (EBV)? a. Achieves latency in sensory ganglia b. Cause of infectious mononucleosis c. Betaherpesvirus subfamily of herpesviruses d. Group A infect: skin and mucous membranes 8 / 60 Acute necrotizing ulcerative gingivitis (ANUG) or trench mouth is caused by a mixed bacterial infection such as? a. Fusobacterium nucleatum and Actinomyces viscosus b. Staphylococcus aureus and Streptococcus mutans c. Fusobacterium nucleatum and Spirochetes d. Fusobacterium nucleatum and Streptococcus mutans 9 / 60 Herpagina is usually cause by? a. Hepatitis A virus b. Group B coxackieviruses c. Group A coxsackieviruses d. Cytomegalovirus 10 / 60 Fusobacterium Nucleatum π a. Plays a crucial role in the beginning of periodontal disease b. Cause scarlet fever c. Black pigmented Gram-negative microorganism d. Implicated in Dental caries 11 / 60 Cryptococcosis? a. Can cause cardiac abnormalities b. Is associated with dog lovers c. Is an infection caused by Cryptococcus neoformans d. Is a localized inflammation around and under the nails 12 / 60 There are some main routes of infection in oral cavity, which one is inexact? a. Transferred by hands or objects b. Transferred by insects bite. c. Transferred through the air on dust particles or water droplets d. Required by transient flora 13 / 60 Which is not true about Ludwig angina? a. Maintain fluid balance. b. Involves submandibular space c. May need emergency tracheostomy d. Caused by an acute or chronic destructive process in periodontium 14 / 60 Microorganism that can grow in the presence as well as in the absence of molecular oxygen is? a. obligatory aerobic b. obligatory anaerobic c. facultatively anaerobic. d. microaerobically 15 / 60 A facultative anaerobic is:? a. Only grow in the presence of O2 b. Ordinarily an anaerobe but can grow with O2 c. Ordinarily an aerobe but can grow in absence of O2. d. Only grow anaerobically 16 / 60 Which of the following bacteria that is predominant in healthy condition? a. Streptococcus sanguinis b. Streptococcus milleri c. Actinomyces viscsus d. Actinomyces israelii. 17 / 60 How to manage dentoalveolar abscess? a. Probiotics replacement of cariogenic bacteria b. Removing source of infection and prescribing antibiotics c. Initial local debridement. d. Reducing cariogenic flora 18 / 60 Communicable diseases can spread by several methods. Which is not an example of the direct transmission mode of disease spread? a. Contact with contaminated food b. Placental transfer. c. Transfusion d. Sexual intercourse 19 / 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. recurrent caries is commonly associated with an existing restoration. c. signs of fissure caries can be first detected in dentine d. fissure caries is commonly seen in the lingual surface of the incisors 20 / 60 Gram staining reflects in bacteria? a. differences in the cell wall structure b. differences in the bacterial plasmatic membrane c. presence or absence of nucleus. d. differences in bacterial metabolism 21 / 60 Bacterial pathogens attach most often by all except which of the following mechanisms? a. Adhesins b. Glycocalyx. c. Fimbriae (pili) d. Spikes 22 / 60 Which of the following statements on clinical sign of dental caries is INEXACTE? a. Chalkywhite lesion b. White-spot lesion. c. Pseudomembrane (slough) d. Roughened and cavitation 23 / 60 Which of the following statements on the natural history of periodontal disease is INEXACT? a. facultative anaerobes predominate in gingivitis. b. Gram-positive cocci predominate in healthy gingival crevice c. the proportion of Gram positive rods decreases to nearly 5% in chronic marginal gingivitis d. Gram-negative anaerobes predominate in chronic periodontitis 24 / 60 Mouthwashes used for controlling oral malodor should contain? a. Sugar to make them more palatable to consumers b. Alcohol c. Xylitol. d. Antibacterial agent 25 / 60 The human body provides a favorable habitat for microorganisms. Which of the following does not contribute to this favorable habitat? a. Stable temperature b. Constant source of nourishment c. Low levels of moisture d. Relatively stable pH. 26 / 60 Members of the genus Lactobacillus are normal microflora of the? a. Hair b. Mouth c. Skin d. Nasopharynx. 27 / 60 The organisms which can grow best in the presence of a low concentration of oxygen? a. Microaerophilic b. Anaerobic. c. Aerobic d. Aerophilic 28 / 60 Which of the following statements on Ludwigβs angina is INEXACTE? a. it needs to be treated with high-dose, parenteral metronidazole and penicillin b. little amount of pus is yielded on surgical drainage. c. it may warrant an urgent tracheostomy d. the majority of cases are due to submandibular sialadenitis 29 / 60 The peak incidence of juvenile periodontitis in children occurs at ages:? a. 5-7 years b. 10-13 years. c. Birth-6 months d. 1-3 years 30 / 60 Virus replicate by which of the following? a. Reproduction. b. Extracellular c. Cell division d. Within a host cell 31 / 60 Demineralization of inorganic portion and destruction of organic of tooth is known as:? a. Enamel caries b. Pulpitis. c. Dentinal caries d. Dental caries 32 / 60 Following can be used for cultivation of viruses EXCEPT:? a. Cell cultures b. Diploid cell line c. Blood agar. d. Primary cell 33 / 60 In dentoalveolar abscess, the bacteria reach pulp by:? a. Traumatic exposure during dental treatment b. Primary herpetic gingivostomatitis. c. Plaque microorganisms d. Poor oral hygiene 34 / 60 Which of the following statements on diagnosis of dental caries is INEXACTE? a. Electrical impedance b. Organoleptic assessment. c. Laser fluorescence d. Probing 35 / 60 The legend of worms, endogenous theories, chemical theories and parasitic theory are early theories explaining:? a. Periodontitis b. Gingivitis c. Osteomylitis. d. Dental caries 36 / 60 Paroi bactΓ©rie gram positif ααΆααααααα? a. ααααΆαα α’αΆα ααααΆαα’αΆαααα»α bactΓ©rie αααααααΆα b. ααααΎα αα·αααααΆαα’αΆαααα»α α αΎα bactΓ©rie αααααααΆα c. ααααΆαα αα·αα’αΆα ααααΆαα’αΆαααα»α α αΎα bactΓ©rie ααααααα α d. ααααΆαα αα·αα’αΆα ααααΆαα’αΆαααα»α α αΎα bactΓ©rie αααααααΆα 37 / 60 ααα·ααΆαα αααΈα’αΆα αΆαααααΆααααααααααααΈαα·αααΆααααααΈα α ααΆ? a. Ration totale b. Ration dβentretien c. ration de crosissance and Ration dβentretien d. ration de crosissance 38 / 60 Protoplaste ααΊααΆααΆααααααΈααα? a. ααΆαααααα + paroi peptide-glycane et enveloppe externe ααααααα»ααα·αααα menbrame cytoplasmique ααααΈαααα α b. ααΆαααααα + paroi + enveloppe α’ααααΆα cytoplasme c. ααααΆα ααααα + paroi peptido-glycane et envelope extemne cytoplasmique ααΆα αααΎαα d. ααααΆαααααα + paroi, peptido-glycane et envelope extene ααααααα»ααα·αααα menbrame cytoplasmique αααα½ααααβ α 39 / 60 Paroi bacterie gram nΓ©gatif ααΆααααααα? a. ααααΆαα α’αΆαααα»αα’αΆα ααααΆα α αΎα bactΓ©rie αααααα b. ααααΎα α’αΆαααα»αα’αΆα ααααΆα α αΎα bactΓ©rie ααααααα α c. ααααΎα α’αΆαααα»αα’αΆα ααααΆαα αΎα bactΓ©rie αααααα d. ααααΎα α’αΆαααα»ααα·αα’αΆα ααααΆαα αΌαααΆα 40 / 60 αααα»αααΆαααααΆαα αΌαααααΆαααΆαα»αα·αα αααΈα’αΆα αΆαααααααΆααααααΈααααΈ forme complexΒ αα»αααΉαααΆαα ααααΈαααα ααααΎααΆαααααΌαααΆαααααΆααααααααα Exoenzyme ααΆαα»αααΎαααΆαααΆαααΌαααα»αααΌα α ααααΈαααααΆααααΌααααα»ααα½αα ααα½αααΌα α’αΆα ααααααΆαα membrame cytoplasmique ααΌα ααΆ? a. CO2 , O2 , acide gras b. CO2 , O2 , acide gras , Nacl c. O2 , H2O , Nacl , acide gras d. Co2, O2, acide gras, polyose 41 / 60 ααα½αααΆααααααΈαααααααΆα peptide-glycane ααααΆα enveloppe externe αα·αααααΆαcytoplasmique α α ααΆ ? a. MΓ©sophile b. Protoplastes c. Mycoplasme d. SphΓ©roplaste 42 / 60 αα αααα»α condition physico-chimique de la croissance ααααααΆααααααΈαααα»ααααααααααα Perssions partielles dβoxygΓ¨ne αααααα ααααΆααααααΈααΆα αααΎααααααα? a. AΓ©robies-anaΓ©robie facultative b. AΓ©robies strictes , Micro-aΓ©rophiles, anaΓ©robies stricte c. AΓ©robies-anaΓ©robie facultative and Γ©robies strictes , Micro-aΓ©rophiles, anaΓ©robies stricte d. MΓ©sophile + Micro-aΓ©rophiles,anaΓ©robies stricte 43 / 60 Micro-aΓ©rophile ααΊααΆααα½αααΆααααααΈαααααααΌαααΆα? a. ααααα O2 αα·α ααααΆα α αααΎαΎαααααΆα b. ααΆαααααα O2 αα·α c. αα·αααααΌαααααα O2 d. ααΆαααααα O2 α αααΎα 44 / 60 αααα»αααΆαααααΆαα αΌαααα αααΈα’αΆα αΆαααααααΆααααααΈ permΓ©ase ααΆαααα»ααααΆαααααααβ ? a. 5αααααα b. 4αααααα c. 6αααααα d. 3αααααα 45 / 60 αααα»αααΆαααααΆαα αΌαααααΆαααΆαα»αα·αα αααΈα’αΆα αΆαααααααΆααααααΈαααααα permΓ©ase ααΆα? a. PermΓ©ase Γ‘ sucre , PermΓ©ase Γ‘ glucose b. PermΓ©ase Γ‘ ions c. PermΓ©ase Γ‘ ions (K,PO4, SO4) and PermΓ©ase Γ‘ protein , permΓ©ase Γ‘ acide amines d. PermΓ©ase Γ‘ protein , permΓ©ase Γ‘ acide amines 46 / 60 ααΆαααααΆαα αΌαααααΆαααΆαα»αα·α α αααΈα’αΆα αΆαααααααΆααααααΈ ααΆαααΆααΆααΆ forme simple α’αΆα ααααΆα α αΌααααααααααααΌα ααΆααΆαααΆαα»? a. ATP , glucose b. Acetyl-CoA c. Acide amine ,β ααΆαα·αααα d. glucose, ATP ,Acide amine 47 / 60 ααΆααααααΈαααααα MΓ©sophile α’αΆα ααααα αααα»αααΈαα»ααα ααΆα? a. 40-50 ΛC b. 10-15 ΛC c. 20-40 ΛC d. 10-20 ΛC 48 / 60 ααααααΎl Microscope optique αα·αα·ααααααα»ααααΆαααααα (Γ‘ l ‘Γ©tat frais) ααΊαα·ααααΆαα·αα·αααααΈ π a. ααΆααααααΈ Grams nΓ©gatif b. ααΌαααΆα ( forme ) c. ααΌαααΆα ( forme ) αα·αααΈα αααΆ (mobilitΓ© ) α d. ααΆααααααΈ Grams positif 49 / 60 ααα ααααΈααααΌαααΆααα·ααα ( besoins srΓ©cifique ) ααααααΆααααααΈ? a. ATP , Glucose -6-Phosphate , glucose and Vitamine, base pyruvique , acide amine ααααΉαααααΌα b. Acides amines , Base pyuvique , ATP c. Vitamine, base pyruvique , acide amine d. ATP , Glucose -6-Phosphate , glucose 50 / 60 ααΆααααααΈαααααα·αααααα’ααααΆαααααΊ ( non pathogΓ©ne ) α’αΆα ααααα αααα»αmilieu? a. milieu base ααααΆα acide ααααΆα b. milieu base c. milieu acide + base d. milieu acide 51 / 60 Strategy to control of rendox potential in oral biofilm:? a. Oxygenating agents b. Stimulate base production c. Inhibition of key microbial enzyme d. Fluoride 52 / 60 Steps in order to perform bacteriological diagnostic of oral microbiology:? a. Direct examination , Gram stain, Antimicrobial Susceptibility testing, Culture , Identification , b. Direct examination , Gram stain, Culture , Identification , Antimicrobial Susceptibility testing c. Identification , Direct examination , Gram stain, Culture , Antimicrobial Susceptibility testing d. Antimicrobial Susceptibility testing, Direct examination , Gram stain, Culture , Identification , 53 / 60 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 54 / 60 Diseases are always found in oral cavity, except π a. Tuberculosis b. Gonococci c. Typhoid fever d. Syphilis 55 / 60 Infections of the mucosa are more usually associated with transient oral bacteria, which one is incorrect? a. Pseudomonas b. Helicobacter c. Enterococcus d. Staphylococcus 56 / 60 Major bacteria usually cause dental caries:? a. Streptococcus pneumoniae, Lactobacilli, Actinomyces vicosus b. Mutans Streptococci, Staphylococcus aureus, Actinomyces vicosus c. Mutans Streptococci, Lactobacilli, Clostridium d. Mutans Streptococci, Lactobacilli, Actinomyces vicosus 57 / 60 Major bacteria cause periodontitis π a. Fusobacterium nucleatum, Petostreptococcus micros, Streptococci, Pneumococcus b. Fusobacterium nucleatum, E.coli, Streptococci, Borrela vincenti c. Fusobacterium nucleatum, Petostreptococcus micros, Enterococcus, Borrela vincenti d. Fusobacterium nucleatum, Petostreptococcus micros, Streptococci, Borrela vincenti 58 / 60 In dental caries, the protective factor is π a. Antibacterials ( fluorides, Chlorhexidine, Xylitol) b. Frequent eating / drinking of fermentable carbohydrates c. Poor oral hygiene d. Acid producing bacteria 59 / 60 Antibiotic which is common use to treat anaerobic bacteria π a. Metronidazole b. Gentamicin c. Vancomycin d. Colistin 60 / 60 On tooth surface, bacteria that participate actively in adhesion of primary colonizers? a. Enterococcus stains b. Streptococcus stains c. Staphylococcus stains d. Pseudomonas stains Your score isThe average score is 0% Facebook 0% Restart quiz Any comments? Send feedback
