607. A patient is initially diagnosed with chlamydiosis. To identify the causative agent, a doctor used a polymerase chain reaction. What is this reaction based on?
А. Specific DNA sequences of microorganisms.
В. Specific superficial antigens of microorganisms.
С. Specific ribosomal antigens of microorganisms.
D. Specific range of fat acids.
Е. Biochemical features of microorganisms.
608. After a holiday trip to Asia, a patient was admitted to the hospital with groin lymphogranulomatosis. How can Chlamydia trachomatis be identified in the material obtained from the patient?
А. Cultivation of the pathogen in chicken embryo.
В. Cultivation of the causative agent in Kitt-Tarozzi medium.
С. Cultivation of the pathogen in Vrublevsky agar.
D. Cultivation of the causative agent on MPA with glucose.
Е. Cultivation of the pathogen in Petronyani agar.
609. A 35-year-old male suffers from chronic urethritis. Microscopy revealed Chlamydia trachomatis in the material obtained from the urethra. What other organs can this infecting agent affect?
А. Eyes.
В. Kidneys.
С. Joints.
D. Central nervous system.
Е. Gastrointestinal tract.
610. Which of the methods is more informative to estimate complete cure from chlamydioseal infection?
А. Serological (identification of antibody titer using ELISA).
В. Express-method (direct IFT).
С. Express-method (PCR – polymerase chain reaction).
D. Western Blott.
Е. Microscopic.
Sanitary Bacteriological Investigation of Microflora (Water, Air, Food Stuff, and Soil)27
611. During sanitary bacteriological investigation of the soil of city rest zones, there was identified high perfringens titer. What is the finding evident of?
A. Former fecal contamination of the soil.
B. Increased number of colibacilli.
C. Presence of causative agents of bacterial intestinal infections.
D. Presence of causative agents of viral intestinal infections.
E. Increased number of thermophile microorganisms.
612. Drinking water is tested for its quality. The number of microbes averages approximately 100 microorganisms/1 ml of water. What groups of microorganisms were accounted by bacteriologist?
A. All the bacteria present in the water.
B. Bacteria of coliforms.
C. Bacteria, pathogenic for humans and animals.
D. Conditional-pathogenic bacteria.
E. Enteropatogenic bacteria and viruses.
613. The air of the surgical ward was investigated with the following result: the total microbial number averaged 1500 microorganisms/1 m3. What groups of microorganisms were accounted by bacteriologist?
A. All the bacteria present in the air.
B. Bacteria and viruses – causative agents of respiratory infections.
C. Staphylococci and hemolytic streptococci.
D. Causative agents of nosocomial infections.
E. All the pathogenic and conditional-pathogenic bacteria.
614. The air of the surgical unit was tested during the operation. The number of bacteria in 1 m3 of the air accounted 150. Bacteriologist identified Gram-positive coagulase-negative bacteria. What microorganisms were identified by bacteriologist?
A. Coagulase-negative staphylococci.
B. Coagulase-positive staphylococci.
C. Escherichia coli.
D. Blue pus bacilli.
E. Causative agents of wound anaerobic gas infection.
615. The water of aqueduct was estimated with the following results: the total microbial number in 1.0 ml of water averaged 80, bacteria of coliforms (coli-index) – 3. How can the quality of the tested water be interpreted?
A. The water is eligiable for drinking.
B. The water is of doubtful eligibility.
C. The water is not eligiable at all.
D. The water is dirty.
E. The water is rather dirty.
616. Bacteriologist revealed two colonies of red pigmentation while testing the water with the method of membrane filters on Endo agar. 500 ml of the tested water was filtered through the membrane. What is the coli-index and coli-titer of the investigated water?
A. 4 and 250.
B. 2 and 500.
C. 250 and 4.
D. 500 and 2.
E. 250 and 2.
617. Sedimental method of investigating the air of the operation theater before the operation revealed 5 small round colonies surrounded by hemolytic zone. What nutrient agar was used for sanitary bacteriological investigation of the air?
A. Blood agar.
B. MPA.
C. Endo agar.
D. Yolk-salt agar.
E. EMB-agar.
618. A consumer got doubted as for the eligibility of the mixed meat considering that it was made of dog meat. Epidemilogist sent a specimen of the meat to the laboratory for investigation. What method of rection will be used to estimate the quality of the obtained piece of meat?
A. Reaction of precipitation.
B. Cumbs reaction.
C. Reaction of agglutination.
D. Reaction of opsonization.
E. Immune fluorescent reaction.
619. Routine sanitary epidemiological control of the air in the drug store revealed bacilli, yeast fungi, hemolytic streptococci, and micrococci. Which of the microorganisms indicate direct danger of epidemy?
A. Hemolytic streptococci.
B. Micrococci.
C. Bacilli.
D. Yeast gungi.
E. The air in the drug store is appropriate of the sanitary rules.
620. Results of the sanitary bacteriological investigation of the air in the operation theater before the operation are the following: 356 colonies grew on MPA, 6 colonies of golden pigmentation with marked zone of hemolysis – on blood agar. Is the air in the operation theater appropriate to the sanitary rules?
A. No, the air is settled by golden staphylococcus.
B. Yes, it is.
C. No, it is moderately contaminated.
D. It’s difficult to estimate the results of investigation.
E. It is not appropriate to the sanitary rules, as the air is contaminated by fungi.
621. A consumer demanded to send the sausage he’d bought before for bacteriological investigation. The tested material was plated on nutrient media: on MPA, Endo agar and Willson-Blair agar. The results of investigation are the following: in two days 250 colonies grew on MPA, 45 colonies grew on Endo agar and 3 colonies − on Willson-Blair agar. How can the eligibility of the sausage be estimated?
A. The product is contaminated; it is not eligiable for use.
B. The number of bacteria is within the norm, the product is not contaminated.
C. The product is partially contaminated; the number of bacteria is within the norm.
D. The product is contaminated by colibacilli; the number of bacteria is within the norm.
E. The product is contaminated by clostridia; it is not eligiable for use.
622. To estimate the sanitary environment of the maternity home, investigation of the air in the delivery room and in the neonatal department was carried out. The test was performed using aspiration method of investigation (the air was tested with Krotov apparatus). What microorganism indicates the danger of epidemy in the maternity home?
A. Pathogenic staphylococcus.
B. Micrococci.
C. Colibacilli.
D. Milky acid bacteria.
E. Bifidum bacteria.
623. Drinking water test includes identification of microorganisms due to sanitary indices and their number in 1 l of water. What microorganisms due to the state standards of Ukraine are considered to be sanitary indicative for drinking water?
A. Bacteria of coliforms.
B. Proteus.
C. Enterococci.
D. Sarcine.
E. Staphylococci.
624. Eligibility of drinking water was estimated in the bacteriological laboratory. What index is characteristic for the number of coliforms in 1 l of water?
A. Perfingens-titer.
B. Coli-titer.
C. Titer of coliphage.
D. Bacteria of coliforms (coli-index).
E. The total microbial number.
