Biology and Microbiology Quiz Questions
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What is the limitation of determining antibodies against Salmonella typhi antigens in blood serum?

  • It is not specific to the disease
  • It is not of diagnostic value (correct)
  • It is only possible during the convalescence period
  • It requires a long time to produce

    • Which of the following is NOT a pathogenicity factor of Neisseria gonorrhoeae?

  • Exotoxin
  • Plasmacoagulase
  • Capsule
  • Spores (correct)

    • What method is used for microbiological diagnosis of leptospirosis?

  • Microscopy of rash elements stained by the Giemza method (correct)
  • Microscopy of smears prepared from sputum and stained by the Sil-Nielsen method
  • Microscopy of Giemza-stained blood smears
  • Microscopy of smears prepared from wound contents

    • What is the characteristic of antibodies against D-antigen?

    <p>They are formed during the convalescence period</p> Signup and view all the answers

    What is the characteristic of antibodies against H-antigen?

    <p>They are formed during the convalescence period</p> Signup and view all the answers

    What type of colonies does a particular bacterium form on a solid nutrient medium?

    <p>Creeping colonies covering the entire surface</p> Signup and view all the answers

    Which of the following diseases is NOT caused by mycoplasmas?

    <p>Infectious mononucleosis</p> Signup and view all the answers

    What is the causative agent of ornithosis?

    <p>Chlamydia psittaci</p> Signup and view all the answers

    Which of the following microorganisms can grow at 42°C?

    <p>Campylobacter jejuni</p> Signup and view all the answers

    What is the primary method of diagnosis for Escherichia?

    <p>Bacteriological method</p> Signup and view all the answers

    Which reaction is NOT used in the diagnosis of actinomycosis?

    <p>Serological method</p> Signup and view all the answers

    What is a pathogenicity factor of Clostridium botulinum?

    <p>capsule</p> Signup and view all the answers

    Which reaction is used in the diagnosis of legionellosis?

    <p>polymerase chain reaction</p> Signup and view all the answers

    What method is used in the diagnosis of tularemia?

    <p>microscopic and serological method</p> Signup and view all the answers

    What is the characteristic of the bacterium obtained from the cerebrospinal fluid of a newborn child with meningeal symptoms?

    <p>Gram-positive, motile, and non-spore-forming</p> Signup and view all the answers

    What toxin causes diarrhea by activating adenylate cyclase in the intestinal epithelium?

    <p>cholerogenic exotoxin</p> Signup and view all the answers

    Which diagnostic technique is used for legionellosis?

    <p>Polymerase chain reaction</p> Signup and view all the answers

    What method is used in the diagnosis of ornithosis?

    <p>determination of antibodies in blood serum</p> Signup and view all the answers

    What is the characteristic of Yersinia pestis colonies in solid food environments?

    <p>Lion's mane-like colonies</p> Signup and view all the answers

    What reaction is used in the serological diagnosis of tularemia?

    <p>agglutination reaction</p> Signup and view all the answers

    Which microorganism is characterized by 8-12 equal folds and is motile?

    <p>Campylobacter</p> Signup and view all the answers

    What type of cells are characteristic of bacterial vaginosis?

    <p>Epithelial cells with coccobacilli</p> Signup and view all the answers

    What is the probable cause of meningeal symptoms in a newborn child?

    <p>Listeria monocytogenes</p> Signup and view all the answers

    What is the probable cause of a gram-negative, motile, rod-shaped bacterium that forms colorless colonies on Endo medium detected from the blood of a febrile patient?

    <p>Escherichia coli</p> Signup and view all the answers

    What is the test used to differentiate Streptococcus pneumoniae from other streptococci?

    <p>Optochin test</p> Signup and view all the answers

    Which method is used in the diagnosis of Helicobacter pylori?

    <p>Serological method</p> Signup and view all the answers

    What is the purpose of the CAMP test?

    <p>To diagnose Streptococcus agalactiae</p> Signup and view all the answers

    Which of the following bacteria has a C5a-peptidase?

    <p>Pseudomonas aeruginosa</p> Signup and view all the answers

    What is the result of the effect of pertussis exotoxin on the gut epithelium?

    <p>An increase in the amount of cyclic AMP</p> Signup and view all the answers

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