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 Chronic periodontitis is characterized by INEXACT:? a. systemic symptoms like fever b. tooth mobility and migration c. absence of pain in general. d. gingival recession 2 / 60 Predisposing factors for acute necrotizing ulcerative gingivitis include INEXACT:? a. immunodeficiency b. heavy smoking c. severe malnutrition d. diabetes. 3 / 60 There are many different types of bacteria normally present in the oral cavity. Which of the following is the name of the one most likely to be associated with the onset of dental caries? a. Spirochaetes b. Streptococcus. c. Staphylococcus d. Bacteroides 4 / 60 Viruses can be cultivated in? a. Broth b. Lab media c. Blood culture. d. Tissue culture 5 / 60 How to manage dental caries? a. Initial local debridement with ultrasonic scaling b. Institute surgical drainage. c. Eliminate primary source of infection d. Minimal cavity preparation techniques 6 / 60 An abortive infection is one in which: ? a. The infected cells are killed b. Cell multiplication is stopped. c. Progeny virus is not produced d. Transplacental infection of the fetus occurs 7 / 60 Which of the following procedures can be regarded as optimal for controlling cross infection in a dental clinic? a. Wearing headgear for all operational procedures b. Washing the gloves and reusing after visual examination of a patient c. Wearing a single face mask for 3 h d. Wearing gloves after removal of all hand jewellery. 8 / 60 Normal flora help protect the body from pathogens β¦ ? a. by competing with other bacteria b. by attacking pathogenic bacteria c. by sharing plasmids with pathogenic bacteria d. by secreting histamines. 9 / 60 Which of the following statements on acute necrotizing ulcerative gingivitis is INEXACTE? a. Commonly associated with poor and neglected oral hygiene b. The disease may be inherited (autosomal recessive). c. If untreated, ulcers enlarge and spread to involve marginal d. Possibly systemic diseases 10 / 60 Turbid dentin in carious tooth is all EXCEPT:? a. Zone of bacterial invasion b. Zone which cannot be remineralised c. Zone in which collagen is irreversibly denatured d. Zone that need not be removed before restoration. 11 / 60 Dentoalveolar abscess is treated by:? a. Drainage through the gingival sulcus or by an external incision. b. Periodontal flap procedure c. Gingivoplasty d. Gingivectomy 12 / 60 Which of the following statements on dental caries is INEXACTE? a. Carious lesion is result of demineralization of enamel b. Chronic endogenous infection caused by normal oral commensal flora c. Destruction of tissues of tooth by bacterial fermentation of dietary carbohydrates. d. Commonly associated with malnutrition and possibly systemic diseases 13 / 60 Microorganism that can grow in the presence as well as in the absence of molecular oxygen is? a. facultatively anaerobic. b. obligatory aerobic c. obligatory anaerobic d. microaerobically 14 / 60 True about caries, all EXCEPT:? a. Not due to microorganisms b. Demineralization of enamel. c. Chronic endogenous infection d. Microorganisms play the most essential role 15 / 60 Which of the following statements on Ludwigβs angina is INEXACTE? a. it may warrant an urgent tracheostomy b. the majority of cases are due to submandibular sialadenitis c. little amount of pus is yielded on surgical drainage. d. it needs to be treated with high-dose, parenteral metronidazole and penicillin 16 / 60 The most common protozoa in the oral cavity of people ? a. Giardia muris b. Entamoeba histolytica c. Trichomonas tenax d. Giardia lamblia. 17 / 60 With regard to prevention of dental caries, which of the following statements are true? a. water fluoridation, though effective, leads to other major systemic illnesses b. remineralization of early lesions can be accomplished by fluoridated toothpaste. c. probiotic therapy with βcariogenicβ bacteria is the most promising approach d. substituting cariogenic artificial sweeteners 18 / 60 Which of the following statements on streptococci are not true? a. Can be primarily differentiated by their hemolytic reactions on blood agar b. mutans group streptococci cause caries c. Some are Gram-positive and anaerobic d. Can cause caries in the absence of sucrose 19 / 60 The dietary carbohydrate most likely involved in etiology of dental caries is π a. Dextran b. Polysaccharide c. Xylitol. d. Sucrose 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 statements on periodontal disease is INEXACT? a. One of major diseases afflicting humankind b. Can be controlled by using mechanical cleansing techniques. c. Disorders of supporting structures of teeth d. Manage by restoration 22 / 60 Members of the genus Lactobacillus are normal microflora of the? a. Nasopharynx. b. Hair c. Skin d. Mouth 23 / 60 Communicable diseases can spread by several methods. Which is not an example of the direct transmission mode of disease spread? a. Sexual intercourse b. Transfusion c. Contact with contaminated food d. Placental transfer. 24 / 60 Protoplaste ααΊααΆααΆααααααΈααα? a. ααααΆα ααααα + paroi peptido-glycane et envelope extemne cytoplasmique ααΆα αααΎαα b. ααΆαααααα + paroi + enveloppe α’ααααΆα cytoplasme c. ααΆαααααα + paroi peptide-glycane et enveloppe externe ααααααα»ααα·αααα menbrame cytoplasmique ααααΈαααα α d. ααααΆαααααα + paroi, peptido-glycane et envelope extene ααααααα»ααα·αααα menbrame cytoplasmique αααα½ααααβ α 25 / 60 ααΆααααααΈαααααα cryophile α’αΆα ααααα αααα»αααααααααΈαα»ααα ααΆα? a. 10 ΛC b. 6 ΛC c. 8 ΛC d. 4 ΛC 26 / 60 virusααΆαααΌαααΆαααΌαααααΆαααΈααα? a. Helical, Icosahedral ,Spirillum (spirals ) b. Helical, Icosahedral, Complex c. Complex Helical,Bacillus(rods) d. Icosa,hedral, Complex, Coccus (sphere) 27 / 60 Mycoplasme ααΊααΆααα½αααΆααααααΈαααααααΆα? a. glycocalix + paroi b. ααααΆααααΈααΌααααΆα c. capsule + paroi d. Paroi 28 / 60 Micro-aΓ©rophile ααΊααΆααα½αααΆααααααΈαααααααΌαααΆα? a. ααΆαααααα O2 α αααΎα b. αα·αααααΌαααααα O2 c. ααΆαααααα O2 αα·α d. ααααα O2 αα·α ααααΆα α αααΎαΎαααααΆα 29 / 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. O2 , H2O , Nacl , acide gras b. CO2 , O2 , acide gras c. Co2, O2, acide gras, polyose d. CO2 , O2 , acide gras , Nacl 30 / 60 Paroi bacterie gram nΓ©gatif ααΆααααααα? a. ααααΎα α’αΆαααα»αα’αΆα ααααΆα α αΎα bactΓ©rie ααααααα α b. ααααΎα α’αΆαααα»ααα·αα’αΆα ααααΆαα αΌαααΆα c. ααααΎα α’αΆαααα»αα’αΆα ααααΆαα αΎα bactΓ©rie αααααα d. ααααΆαα α’αΆαααα»αα’αΆα ααααΆα α αΎα bactΓ©rie αααααα 31 / 60 ααα’αΆα αα·ααααΆααΉαααΈααΌαααΆαααΆααααααΈααΆαααΌα αααααα αα·α ααΆαα’ααααΆααα αααααΆα? a. Paroi ααααΆααααααΈ b. noyau ααααΆααααααΈ c. Capsule ααααΆααααααΈ d. glycocalix ααααΆααααααΈ 32 / 60 virusααΆαααα αααΌα ααΆα ααΆααααααΈα ααα½α ? a. α‘α α α αα b. α’α α α αα c. α©α α αα d. α¨α α αα 33 / 60 αααα»αααΆαααααΆαα αΌαααααΆαααΆαα»αα·αα αααΈα’αΆα αΆαααααααΆααααααΈαααααα permΓ©ase ααΆα? a. PermΓ©ase Γ‘ ions (K,PO4, SO4) and PermΓ©ase Γ‘ protein , permΓ©ase Γ‘ acide amines b. PermΓ©ase Γ‘ sucre , PermΓ©ase Γ‘ glucose c. PermΓ©ase Γ‘ ions d. PermΓ©ase Γ‘ protein , permΓ©ase Γ‘ acide amines 34 / 60 AnaΓ©robies strictes ααΊααα½αααΆααααααΈαααα’αΆα ααα αα·αααΌαααΆααααΆαααΆαααα? a. ααΆαααααα O2α αααΎα b. ααΆαααααα O2 αααα c. ααααΆαααααα O2 ααα d. ααΆαααααα O2 αα·α 35 / 60 ααα½αααΆααααααΈααΆαααα’αΆα ααααα ααΆααααααααα O2 ααΈ α’αααααααααΆα? a. EntΓ©robactΓ©rie b. EschΓ©richia-coli c. Salmonella d. gonocoque 36 / 60 ααΆααααααΈαααααα·αααααα’ααααΆαααααΊ ( non pathogΓ©ne ) α’αΆα ααααα αααα»αmilieu? a. milieu acide + base b. milieu acide c. milieu base ααααΆα acide ααααΆα d. milieu base 37 / 60 ααΆααααααΈααΆααααααα sensible αα·αααΆααααααΈ ultra violet , ααΆααααααΈ X αα·ααααααΊ? a. ααα½αααΆααααααΈ gram (+), gram(-) and ααα½α EntΓ©robactΓ©rie b. ααα½αααΆααααααΈ gram (+) c. ααα½αααΆααααααΈ gram(-) d. ααα½α EntΓ©robactΓ©rie 38 / 60 ααΎαααααΎ Microscope optique αα·αα·ααααααααααΆααααα α α’αΆα αα·αα·ααααααΆαα αααΆααααΆααααΈααΌαααΆα αα·α α ααα»α ααααΆααα αβ α’αΆα ααΉαααΈαα ααΆαααααααα α’αΆα ααΉαααΈ? a. ααΆααααααΈ Grams positif α¬ Grams nΓ©gatif b. ααΈα αααΆ (mobilitΓ© ) ααΌαααΆα ( forme ) c. ααΆααααααΈ Grams nΓ©gatif d. ααΆααααααΈ Grams positif 39 / 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. Herpetic stomatitis c. Lateral periodontal abcess d. Acute necrotizing ulcerative gingivitis 40 / 60 The virulence of Porphyromonas gingivalis is partly due to? a. Hyaluronic acid b. Adhesins c. Proteases, haemolysin and collagenase d. Cytotoxins 41 / 60 Which of the following statements on Actinomycetes are not true? a. Short rods, but often pleomorphic b. It infrequently causes actinomycoses of the jaws after tooth extractions c. It causes chronic granulomatous infections d. It is a eukaryote 42 / 60 Elderly patients sometimes present with a fungal infection of the palate, beneath a denture,referred to as denture stomatitis. Which organism causes this condition? a. Staphylococcus aureus b. Herpes simplex c. Actinomyces d. Candida albicans 43 / 60 Which of the following statement on Actinobacillus actinomycetemcomitans are true? a. Non-capsulate diplococcic b. Aggressive forms of periodontal disease in adolescents c. cigar-shaped bacilli d. Aggressive forms of dental caries in adolescents 44 / 60 Mumps virus is belonging to? a. Orthomyxoviridae b. Paramyxoviridae c. None of these d. Retroviriae 45 / 60 Primary herpesvirus infections may cause:? a. Herpes zoster b. Herpetic gingivostomatitis c. Meningititis d. Herpes labialis 46 / 60 Herpagina is usually cause by? a. Hepatitis A virus b. Cytomegalovirus c. Group A coxsackieviruses d. Group B coxackieviruses 47 / 60 The comment bacterium causes dental caries:? a. Mutans Streptococci b. Pseudomonas aeruginosa c. Staphylococcus aureus d. E.coli 48 / 60 Major bacteria cause aggressive periodontitis? a. Actinobaccilus actinomycetemcomitans, 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. Prevotella intermedia, Fusobacterium nucleatum, Porphyromonas endodontalis, Prevotella tannerae 49 / 60 A bacterium that never found in tooth surface:? a. Streptococcus mutans b. Streptococcus mitis c. Streptococcus anginosus d. Streptococcus pneumoniae 50 / 60 Strategy to control of nutrients in oral biofilm:? a. Stimulate base production b. Antimicrobial agents c. Fluoride d. Inhibition of key microbial enzyme 51 / 60 Principal Cocci Gram positive bacteria found in oral cavity:? a. Peptostreptococcus b. Neisseria c. Moraxella d. Veillonella 52 / 60 Diseases are always found in oral cavity, except π a. Gonococci b. Syphilis c. Tuberculosis d. Typhoid fever 53 / 60 Infection in oral cavity by oral flora, which proposition is inexact? a. Changes in exposure to antiseptic b. Changes in the immune system c. Changes in salivary flow d. Administration of antibiotics 54 / 60 Pathway in order of pathogenesis of oral infection:? a. 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 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 – Pus formation- Formation of infiltrate – Destruction of connective tissues – Decrease tissue resistance and increase number of bacteria with virulence d. 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 55 / 60 A bacterium from buccal mucosa that can cause lung infection in chronic obstructive pulmonary infections in cystic fibrosis patients is:? a. Streptococcus pneumoniae b. Pseudomonas aeruginosa c. Klebsiella pneumoniae d. Mycobacterium tuberculosis 56 / 60 Major bacteria cause periodontitis π a. Fusobacterium nucleatum, E.coli, Streptococci, Borrela vincenti b. Fusobacterium nucleatum, Petostreptococcus micros, Enterococcus, Borrela vincenti c. Fusobacterium nucleatum, Petostreptococcus micros, Streptococci, Pneumococcus d. Fusobacterium nucleatum, Petostreptococcus micros, Streptococci, Borrela vincenti 57 / 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. Antimicrobial Susceptibility testing, Direct examination , Gram stain, Culture , Identification , d. Identification , Direct examination , Gram stain, Culture , Antimicrobial Susceptibility testing 58 / 60 Bacteria usually cause Pericoronitis? a. Fusiform bacillus, Eikenella corrodens, Alpha-hemolytic Streptococci and Capnocytophaga sputigena b. Borrelia vincentii, Bacterioides, Provetella and Eikenella corrodens c. Fusiform bacillus , Provetella, Eikenella corrodens and Capnocytophaga sputigen d. Alpha-hemolytic Streptococci, Provetella, Bacterioides and Capnocytophaga 59 / 60 The most common bacterium that is responsible for tonsillitis and pharyngitis is:? a. Streptococcus mitis b. Group-B beta hemolytic Streptococcus ( Streptococcus agalactiae) c. Streptococcus mutans d. Group-A beta hemolytic Streptococcus ( Streptococcus pyogenses) 60 / 60 A bacterium that is usually found in tongue π a. Staphylococcus epidemidis b. Streptococcus mitis c. Streptococcus pneumoniae d. Clostridium difficile Your score isThe average score is 0% Facebook 0% Restart quiz Any comments? Send feedback
