Krok 1 – 2015 Microbiology Base

1. Quite often the cause of secondary immunodeficiency is an infection

involvement, when the causative agents propagate directly in the cells of
immune system and destroy it. The following diseases are characterized
by:
A. Infectious mononucleosis, AIDS
B. Tuberculosis, mycobacteriosis
C. Poliomyelitis, type A hepatitis
D. Dysentery, cholera
E. Q-febris, epidemic typhus

2. It is planned to use the territory of an old cattle burial ground (which is not
used for more than 50 years) for building houses. But ground analysis
revealed presence of the pathogen of the very dangerous illness. Which of the
indicated microorgonisms is likely to remain in the ground for such a long
time?
A. Bacillus anthracis
B. Francisella tularensis
C. Brucella abortus
D. Yersinia pestis
E. Mycobacterium bovis

3. From the nasopharynx of a 5-year-old child it was excreted amicroorganism

which is identical to Corynebacterium diphtheriae dose according to
morphological and biochemical signs.Microorganism does not produce
exotoxin. As a result of what process can this microorganism become
toxigenic?
A. Phage conversion
B. Cultivation in the telluric environment
C. Passing through the organism of the sensative animals
D. Growing with antitoxic serum
E. Chromosome mutation

4. While studying a microslide obtained from the punctuate of a regional

lymph node and stained by Romanovsky -Giemsa method a physician
revealed some light-pink thin microorganisms with 12-14 regular spiral
coils and pointed ends, up to 10-13 micrometer long. This might be the
causative agent of the following disease:
A. Syphilis
B. Trypanosomiasis
C. Leptospirosis
D. Relapsing fever
E. Leishmaniasis
 5. Sanitary bacteriological research on water by the membrane filter method
revealed two red colonies on a membrane filter (Endo agar) through which
500 ml of analyzed water were passed. Calculate the coli index and coli
titer of the analyzed water:
A. 4 and 250
B. 2 and 500
C. 250 and 4
D. 500 and 2
E. 250 and 2

6. While examining a patient an otolaryngologist noticed hyperaemia and

significantly edematous tonsils with a grayish film upon them.
Microscopical examination of this film revealed some gram-positive bacilli
placed at an angle with each other. What disease might be suspected?
A. Diphtheria
B. Angina
C. Scarlet fever
D. Meningococcal nasopharyngitis
E. Epidemic parotitis

7. Patient with vomiting, dizziness, sensation of dubble vision, difficult

swallowing was admitted to the hospital. Doctor suspects botulism. What
diagnostic methods should be used for diagnosis approving?
A. Biological test, bacteriological
B. Allergic test, serological
C. Bacteriological, mycological
D. Protozoological, microscopical

8. A man who was bitten by the unknown dog applied to the surgeon. Wide
ragged woundes were localised on the face. What curative-prophylactic aid
should be given to prevent rabies?
A. Start immunisation with rabies vaccine
B. Prescribe combine antibiotic therapy
C. Immediate injection of DPT (Diphtheria, Pertusis, Tetanus) vaccine
D. Hospitalize the patient and keep under the doctor's supervision
E. Immediately inject normal gamma globulin

9. In a patient with clinical signs of immunodeficiency the number and

functional activity of T and B lymphocytes are not changed. Defect with
dysfunction of antigen-presentation to the immunocompetent cells was found
during investigation on the molecule level. Defect of what cells is the most
probable?
A. Macrophages, monocytes
B. Т-lymphocytes, В-lymphocytes
C. NK-cells
D. Fibroblasts, Т- lymphocytes, В-lymphocytes
E. 0-lymphocytes

10. A patient with complaints of 3-day-long fever, general weakness, loss of

appetite came to visit the infectionist. The doctor suspected enteric fever.
Which method of laboratory diagnosis is the best to confirm the diagnosis?
A. Detachment of blood culture
B. Detachment of myeloculture
C. Detachment of feces culture
D. Detachment of urine culture
E. Detachment of pure culture

11. A consumptive patient has an open pulmonary form of disease.

Choose what sputum staining should be selected for finding out the
tubercle (Koch's) bacillus?
A. Method of Ziel-Neelsen
B. Method of Romanowsky-Giemsa
C. Method of Gram
D. Method of Neisser
E. Method of Burry-Gins

12. During surgical operation a blood transfusion was made. The blood must
be checked to find antigens of some disease. What disease is expected to be
found?
A. Virus of hepatitis B
B. Virus of hepatitis A
C. Adenovirus
D. Enterovirus
E. Virus of hepatitis E

13. A 42-year-old man who has been injured in a car accident is brought
into the emergency room. His blood alcohol level on admission is 250
mg/dL. Hospital records show a prior hospitalization for alcohol related
seizures. His wife confirms that he has been drinking heavily for 3
weeks. What treatment should be provided to the patient if he goes into
withdrawal?
A. Diazepam
B. Phenobarbital
C. Pentobarbital
D. Phenytoin
E. None

14. A patient who came to the doctor because of his infertility was administered
to make tests for toxoplasmosis and chronic gonorrhoea. Which reaction
should be performed to reveal latent toxoplasmosis and chronic gonorrhoea
 of the patient?
A. (R)CFT- Reiter's complement fixation test
B. IFA - Immunofluorescence assay
C. Immunoblot analysis
D. RDHA - Reverse direct hemagglutination assay
E. RIHA - Reverse indirect hemagglutination assay

15. On bacteriological study of rinsing water of the patient with food poisoning,
the pure bacterial culture was inoculated with the following properties: gram-
negative motile bacillus in the Endo environment grows like achromic colony.
Representative of what genus has caused the illness?
A. Salmonella
B. Shigella
C. Yersinia
D. Escherichia
E. E Citrobacter

16. The person was selling "homemade pork" sausages on the market. State
sanitary inspector suspected falcification of the sausages.With help of what
serological immune reaction can food substance be identified?
A. Precipitation test
B. Indirect hemagglutination test
C. Agglutination test
D. Immunofluorescence test
E. Complement- fixation test

17. While registering the child to the school Mantu's test was made to define
whether revaccination was needed test result is negative. What does this
result of the test mean?
A. Absence of cell immunity to the tuberculosis
B. Presence of cell immunity to the tuberculosis
C. Absence of antibodies for tubercle bacillus
D. Absence of antitoxic immunity to the tuberculosis
E. Presence of antibodies for tubercle bacillus

18. The donor who for a long time didn't donate the blood was investigated
with IFA method. Anti-HBs antibodies were revealed. What does positive
result of IFA in this case mean?
A. Previous hepatitis B
B. Acute hepatitis B
C. Acute hepatitis C
D. Chronic hepatitis В
E. Chronic hepatitis С

19. Bacteriological examination of purulent discharges from the urethra

 revealed gram-negative bacteria looking like coffee beans. They were
localized in the leukocytes and could decompose glucose and maltose to
acid. These are the causative agents of the following disease:
A. Gonorrhoea
B. Syphilis
C. Veneral lymphogranulomatosis
D. Soft chancre
E. Melioidosis

20. Scraps of the mycelium of a fungus, spores, air bubbles and fat drops were
discovered on microscopy of the patient's hair excluded from the infected
areas. For what fungus disease is this microscopic picture characteristic?
A. Favus
B. Microspory
C. Trichophytosis
D. Epidermophytosis
E. Sporotrichosis

21. In order to speed up healing of a wound of oral mucosa a patient was

prescribed a drug that is a thermostable protein occuring in tears, saliva,
mother's milk as well as in a new-laid hen's egg. It is known that this protein
is a factor of natural resistance of an organism. What is it called?
A. Lysozyme
B. Complement
C. Interferon
D. Interleukin
E. Imanine

22. Study of bacteriological sputum specimens stained by the Ziel-Neelsen

method revealed some bright-red acid-resistant bacilli that were found in
groups or singularly. When inoculated onto the nutrient media, the signs of
their growth show up on the 10-15 day. These bacteria relate to the following
family:
A. Micobacterium tuberculosis
B. Yersinia pseudotuberculosis
C. Histoplasma dubrosii
D. Klebsiella rhinoscleromatis
E. Coxiella burnettii

23. A man was admitted to the hospital on the 5th day of disease that
manifested itself by jaundice, muscle aching, chill, nose bleedings. In course
of laboratory diagnostics a bacteriologist performed dark-field microscopy
of the patient's blood drop. Name a causative agent of this disease:
A. Leptospira interrogans
B. Borrelia dutlonii
C. Calymmatobacterium granulomatis
D. Bartonella bacilloformis
E. Rickettsia mooseri

24. Gramnegative bin-shaped diplococcus inside and outside of leucocytes were

detected on bacteriological examination of the purulent exudates from the
cervix of the uterus. Name the causative agent of purulent inflammation of
the cervix of the uterus.
A. Neisseria gonorroeae
B. Chlamidia trachomatis
C. Haemophilus vaginalis
D. Trichomonas vaginalis
E. Calymmatobacterium granulomatis

25. Patient with diarrhoea was admitted to the infection unit. Gramnegative
curved rod-like bacteria were founded on bacterioscopic examination of
faecal masses. What is the most likely disease in this patient?
A. Cholera
B. Typhoid fever
C. Salmonellosis gastroenteritis
D. Diphtheria
E. Intestinal form of plague

26. In a 2-year-old child with catarrhal presentations and skin rash a

pediatrician suspected scarlet fever. The child was given intracutaneously
a small dose of serum antibody to the streptococcal erythrogenic toxin; on
the site of injection the rash disappeared. What do the reaction results
mean?
A. The clinical diagnosis was confirmed
B. The child has hypersensitivity to the erythrogenic toxin
C. The disease wasn't caused by haemolytic streptococcus
D. The whole serum dose may be injected intravenously
E. The child has very weak immune system

27. From the defecation of a 6-year-old ill child, who has artificial feeding, the
intestinal bacillus with antigen structure 0-111 is excreted. What is the
diagnosis?
A. Coli-enteritis
B. Gastroenteritis
C. Cholera-like diseasis
D. Food poisoning
E. Disentery-like diseasis

28. For serological diagnostics of the whooping cough it was made large-scale
reaction with parapertussis and pertussis diagnosticums. At the bottom of
the test-tubes with diagnosticum of Bordetella parapertussis grain-like
 sediment formed. What antibodies have this reaction revealed?
A. Agglutinins
B. Precipitins
C. Opsonins
D. Bacteriolysins
E. Antitoxins

29. A man died from an acute infectious disease accompanied by fever, jaundice,
haemorrhagic rash on the skin and mucous membranes as well as by acute
renal insufficiency. Histological examination of renal tissue (stained by
Romanovsky-Giemsa method) revealed some convoluted bacteria looking
like C und S letters. What bacteria were revealed?
A. Leptospira
B. Treponema
C. Spirilla
D. Borrelia
E. Campilobacteria

30. A 16 y.o. boy from a countryside entered an educational establishment.

Scheduled Manteux test revealed that the boy had negative reaction. What
are the most reasonable actions in this case?
A. To perform BCG vaccination
B. To repeat the reaction in a month
C. To perform serodiagnostics of tuberculosis
D. To isolate the boy temporarily from his mates
E. To perform rapid Price diagnostics

31. Examination of a patient with pustular skin lesions allowed to isolate a

causative agent that forms in the blood agar roundish yellow middle-sized
colonies surrounded by haemolysis zone. Smears from the colonies contain
irregular-shaped clusters of gram-positive cocci. The culture is oxidase- and
catalase-positive, ferments mannitol and synthesizes plasmocoagulase. What
causative agent was isolated?
A. Staphylococcus aureus
B. Streptococcus agalactiae
C. Streptococcus pyogenes
D. Staphylococcus epidermidis
E. Staphylococcus saprophyticus

32. Microscopic examination of a Gram-stained scrape from patient's tongue

revealed oval, round, elongated chains of dark-violet gemmating cells.
What disease can be caused by this causative agent?
A. Candidosis
B. Actinomycosis
C. Streptococcic infection
D. Staphylococcic infection
E. Diphtheria
 33. From pharynx of a child with suspected diphtheria a pure culture of
microorganisms was isolated. Their morphological, tinctorial, cultural and
biochemical properties appeared to be typical for diphtheria causative
agents. What study should be conducted in order to drow a conclusion that
this is a pathogenic diphtheria bacillus?
A. Estimation of toxigenic properties
B. Estimation of proteolytic properties
C. Estimation of urease activity
D. Estimation of cystinous activity
E. Estimation of ability to decompose starch

34. Examination of a child revealed some whitish spots looking like coagulated
milk on the mucous membrane of his cheeks and tongue. Analysis of
smears revealed gram-positive oval yeast-like cells. What causative agents
are they?
A. Candida
B. Staphylococci
C. Diphtheria bacillus
D. Actinomycetes
E. Fusobacteria

35. A duodenal content smear of a patient with indigestion contains protosoa 10-
18 mcm large. They have piriform bodies, 4 pairs of filaments, two
symmetrically located nuclei in the broadened part of body. What kind of the
lowest organisms is it?
A. Lamblia
B. Dysentery ameba
C. Trichomonas
D. Intestinal ameba
E. Balantidium

36. Blood of a patient with presumable sepsis was inoculated into sugar broth.
There appeared bottom sediment. Repeated inoculation into blood agar
caused growth of small transparent round colonies surrounded by hemolysis
zone. Examination of a smear from the sediment revealed gram-positive cocci
in form of long chains. What microorganisms are present in blood of this
patient?
A. Streptococci
B. Micrococci
C. Staphylococci
D. Tetracocci
E. Sarcina

37. On bacteriological examination of the defecation of a 4-months-old baby with

 the symptoms of acute bowel infection there were revealed red colonies
spread in the large quantity in the Endo environment. What microorganism
can it be?
A. Escherichia
B. Salmonella
C. Staphylococcus
D. Streptococcus
E. Shigell

38. Bacteriological examination of a patient with food poisoning required

inoculation of a pure culture of bacteria with the following properties: gram-
negative movable bacillus that grows in the Endo's medium in form of
colourless colonies. A representative of which species caused this disease?
A. Salmonella
B. Shigella
C. Iersinia
D. Esherichia
E. Citrobacter

39. Examination of a young man in the AIDS centre produced a positive result of
immune-enzyme assay with HIV antigens. Patient's complaints about state of
his health were absent. What can the positive result of immune-enzyme assay
be evidence of?
A. HIV infection
B. Being ill with AIDS
C. Being infected with HBV
D. Having had AIDS recently
E. HBV persistence

40. Microscopy of stained (Ziehl-Neelsen staining) smears taken from the

sputum of a patient with chronic pulmonary disease revealed red bacilli.
What property of tuberculous bacillus was shown up?
A. Acid resistance
B. Alkali resistance
C. Alcohol resistance
D. Capsule formation
E. Sporification

41. Reaction of passive hemagglutination conducted with erythrocytic typhoid

Vi-diagnosticum helped to reveal some antibodies in the dilution of the
patient's serum at a ratio of 1:80 that exceeds the diagnostic titer. Such
result witnesses of:
A. Being a potential carrier of typhoid bacilli
B. Being ill with acute typhoid fever
C. Typhoid fever recurrence
D. Incubation period of typhoid fever
E. Reconvalescence of a patient ill with typhoid fever
 42. In order to determine toxigenicity of diphtheria bacilli a strip of filter paper
impregnated with antitoxic diphtherial serum was put on the dense nutrient
medium. There were also inoculated a microbal culture under examination
and a strain that is known to be toxigenic. If the microbal culture under
examination produces exotoxin, this wil result in formation of:
A. Precipitin lines
B. Haemolysis zones
C. Zones of diffuse opacification
D. Zones of lecithovitellinous activity
E. Precipitin ring

43. A 50-year-old patient with typhoid fever was treated with Levomycetin,
the next day his condition became worse, temperature rised to 39,6 0 С.
What caused worthening?
A. The effect of endotoxin agent
B. Allergic reaction
C. Irresponsiveness of an agent to the levomycetin
D. Secondary infection addition
E. Reinfection

44. In order to estimate toxigenity of diphtheria agents obtained from patients

the cultures were inoculated on Petri dish with nutrient agar on either side of
a filter paper strip that was put into the centre and moistened with
antidiphtheric antitoxic serum. After incubation of inoculations in agar the
strip-like areas of medium turbidity were found between separate cultures
and the strip of filter paper. What immunological reaction was conducted?
A. Precipitation gel reaction
B. Coomb's test
C. Agglutination reaction
D. Rings precipitation reaction
E. Opsonization reaction

45. A patient with clinical signs of encephalitis was delivered to the infectious
diseases hospital. Anamnesis registers a tick bite. Hemagglutination-
inhibition reaction helped to reveal antibodies to the causative agent of
tick-borne encephalitis in the dilution 1:20 which is not diagnostic. What
actions should the doctor take after he had got such result?
A. To repeat the examination with serum taken 10 days later
B. To examine the same serum
C. To apply more sensitive reaction
D. To repeat examination with another diagnosticum
E. To deny diagnosis of tick-borne encephalitis

46. The first grade pupils were examined in order to sort out children
 for tuberculosis revaccination. What test was applied for this
purpose?
A. Mantoux test
B. Schick test
C. Supracutaneous tularin test
D. Burnet test
E. Anthraxine test

47. Clinical diagnosis of a female patient was gonorrhoea. What examination

method can be applied for confirmation of this diagnosis?
A. Microscopy of pathological material
B. Infection of laboratory animals
C. Test with bacteriophage
D. Hemagglutination reaction
E. Immobilization reaction

48. A patient suffering from periodical attacks caused by inhalation of

different flavoring substances was diagnosed with atopic bronchial
asthma. IgE level was increased. This is typical for the following type of
reactions:
A. Anaphylactic reactions
B. Cytotoxic reactions
C. Immunocomplex reactions
D. delayed-type hypersensitivity
E. Autoimmune reactions

49. Bacteriological laboratory examines canned meat whether it contains

botulinum toxin. For this purpose an extract of test specimen and antitoxic
antibotulinic serum of A, B, E types were introducted to a group of mice
under examination; a control group of mice got the extract without
antibotulinic serum. What serological reaction was applied?
A. Neutralization
B. Precipitation
C. Complement binding
D. Opsono-phagocytic
E. Double immune diffusion

50. For the purpose of retrtospective diagnostics of recent bacterial dysentery it

was decided to perform serological examination of blood serum in order to
determine antibody titer towards Shiga bacilli. What of the following
reactions should be applied?
A. Passive hemagglutination
B. Bordet-Gengou test
C. Precipitation
D. Hemolysis
E. Bacteriolysis
 51. During the repeated Widal's agglutination test it was noticed that the ratio
of antibody titers and O-antigens S.typhi in the patient's serum had
increased from 1:100 to 1:400. How would you interpret these results?
A. The patient has typhoid fever
B. The patient is an acute carrier of typhoid microbes
C. The patient is a chronic carrier of typhoid microbs
D. The patient previously had typhoid fever
E. The patient was previously vaccinated against typhoid fever

52. A patient recovered from Sonne dysentery and was once more infected
with the same causative agent. What is such infection form called?
A. Reinfection
B. Recidivation
C. Superinfection
D. Persisting infection
E. Chronic infection

53. A 10-year-old child had the mantoux tuberculin test administered. 48 hours
later a papule up to 8 mm in diameter appeared on the site of the injection.
What type of hypersensitivity reaction developed after the tuberculin
injection?
A. Type IV hypersensitivity reaction
B. Arthus phenomenon
C. Seroreaction
D. Atopic reaction
E. Type II hypersensitivity reaction

54. A patient with clinical presentations of immunodeficiency went through

immunological examinations. They revealed significant loss of cells that
form rosettes with erythrocytes of a ram. What conclusion can be made
according to the analysis data?
A. Decrease of T-lymphocytes rate
B. Decrease of B-lymphocytes rate
C. Decrease of natural killer cell rate
D. Decrease of complement system rate
E. Insufficiency of effector cells of humoral immunity

55. As a result of durative antibiotic therapy a 37-year old patient developed

intestinal dysbacteriosis. What type of drugs should be used in order to
normalize intestinal microflora?
A. Eubiotics
B. Sulfanilamides
C. Bacteriophages
D. Autovaccines
E. Vitamins
 56. Among junior children of an orphanage an outbreak of intestinal
infection with signs of colienteritis was registered. In order to identify
isolated causative agent it is necessary to:
A. Study antigenic properties of the causative agent
B. To determine sensitivity to antibiotics
C. To study sensitivity to bacteriophages
D. To study biochemical properties of the causative agent
E. To study virulence of the causative agent

57. Urine examination of a patient with acute cystitis revealed leukocytes and a
lot of gram-negative bacilli. Inoculation resulted in growth of colonies of
mucous nature that formed green soluble pigment. What microorganism is
the most probable cause of the disease?
A. Pseudomonas aeruginosa
B. Escherihia coli
C. Klebsiella pneumoniae
D. Proteus mirabilis
E. Salmonella enteritidis

58. A laboratory received a material from a patient's wound. Ppreliminary

diagnosis is gaseous gangrene. What microbiological method should be
applied to determine species of causative agent?
A. Bacteriological
B. Allergic
C. Bacterioscopic
D. Serological
E. RIA

59. A virological laboratory obtained pathological material (mucous

discharges from nasal meatuses) taken from a patient with provisional
diagnosis "influenza". What quick test will allow to reveal specific viral
antigen in the material under examination?
A. Direct and indirect immunofluorescence test
B. Direct and indirect fluorescence immunoassay
C. Hemagglutination inhibition assay
D. Radioimmunoassay

60. In the surgical department of a hospital there was an outbreak of hospital

infection that showed itself in often postoperative wound abscesses.
Bacteriological examination of pus revealed aurococcus. What
examination shall be conducted to find out the source of this causative
agent among the department personnel?
A. Phagotyping
B. Microscopical examination
C. Serological identification
D. Estimation of antibiotic susceptibility
E. Biochemical identification

61. A 7 year old child often suffers from streprococcic angina. Doctor suspected
development of rheumatism and administered serological examination.
The provisional diagnosis will be most probably confirmed by presence of
antibodies to the following streptococcic antigen:
A. O-streptolysin
B. C-carbohydrate
C. M-protein
D. Erythrogenic toxin
E. Capsular polysaccharide

62. A culture of monkey cells (Vero) and a group of mouse sucklings were
infected with an inoculum taken from a child with provisional diagnosis
"enterovirus infection". There was no cytopathic effect on the cell culture but
mouse sucklings died. What enteric viruses might have caused disease of this
child?
A. Coxsackie A
B. Coxsackie B
C. ECHO virus
D. Polioviruses
E. Unclassified enteric viruses 68-71

63. A patient has been suffering from elevated temperature and attacks of
typical cough for 10 days. Doctor administered inoculation of mucus from
the patient's nasopharynx on the agar. What microorganism is presumed?
A. Pertussis bacillus
B. Pfeiffer's bacillus
C. Listeria
D. Klebsiella
E. Staphylococcus

64. A patient of surgical department complains about pain in the small of her
back and in the lower part of her belly; painful and frequent urination.
Bacteriological examination of urine revealed gram-negative oxidase-
positive rod-like bacteria forming greenish mucoid colonies with specific
smell. What causative agent can it be?
A. Pseudomonas aeruginosa
B. Proteus mirabilis
C. E.coli
D. Str.pyogenes
E. Mycoplasma pneumonie

65. A female patient underwent liver transplantation. 1,5 month after it her
 condition became worse because of reaction of transplant rejection. What
factor of immune system plays the leading part in this reaction?
A. T-killers
B. Interleukin-1
C. Natural killers
D. B-lymphocytes
E. T-helpers

66. Microscopical examination of a microbal culture revealed fusiform

spore-forming microorganisms that get violet-blue Gram's stain. What
microorganisms were revealed?
A. Clostridia
B. Streptococci
C. Spirochaete
D. Actinomycete
E. Diplococci

67. A specimen stained by Ozheshko method contains rod-like

microorganisms stained blue with round terminal components stained
red. What are these components called?
A. Spores
B. Cilia
C. Flagella
D. Capsules
E. Mesosomas

68. During the regular sanitary-epidemiological inspection of a pharmacy, the

bacteriological analysis of air was performed. The air was found to have
bacilli, yeast fungi, hemolytic streptococci, micrococci. Which of the detected
microorganisms indicate the direct epidemic danger?
A. Haemolytic streptococci
B. Micrococci
C. Bacilli
D. Yeast fungi

69. A bacteriological laboratory received sputum sample of a patient suffering

from tuberculosis. Bacterioscopic examination of smears and detection of
tuberculosis bacillus can be realized by one of enrichment methods that
involves processing of sputum only with solution of caustic soda. What is
this method called?
A. Homogenization
B. Inactivation
C. Flotation
D. Filtration
E. Neutralization
 70. A pregnant woman was registered in an antenatal clinic and underwent
complex examination for a number of infections. Blood serum contained IgM
to the rubella virus. What is this result indicative of?
A. Of primary infection
B. Of a chronic process
C. The woman is healthy
D. Of exacerbation of a chronic disease
E. Of recurring infection with rubella virus

71. A 65-year-old man has purulent abscess on his neck. Analyses

revealed a culture of gram-positive cocci with plasmocoagulase
activity. This culture relates most likely to:
A. Staphylococcus aureus
B. Streptococcus pyogenes
C. Staphylococcus epidermidis
D. Staphylococcus saprophyticus

72. Material taken from a patient with provisional diagnosis "influenza" was
referred to a laboratory. For virological examination the hemadsorption
reaction was applied. This reaction can be applied for detection of the
following viruses:
A. Viruses containing hemagglutinins
B. All the simple viruses
C. All the complex viruses
D. DNA-genomic viruses
E. Any viruses

73. Vomiting matters of a patient suspected of having cholera were delivered to

the bacteriological laboratory. The material was used for preparing a
"hanging drop" specimen. What type of microscopy will be applied for
identification of the causative agent by its mobility?
A. Phase-contrast microscopy
B. Electron microscopy
C. Immune and electron microscopy
D. Fluorescence microscopy
E. Immersion microscopy

74. Inoculum from pharynx of a patient ill with angina was inoculated into
blood-tellurite agar. It resulted in growth of grey, radially striated (in form
of rosettes) colonies 4-5 mm in diameter. Gram-positive bacilli with
clublike thickenings on their ends placed in form of spread wide apart
fingers are visible by microscope. What microorganisms are these?
A. Diphtheria corynebacteria
B. Botulism clostridia
C. Diphtheroids
D. Streptococci
E. Streptobacilli

75. During examination of a patient a dentist revealed a lot of "white spots" -

zones of enamel demineralization. What microorganisms take part in the
development of this process?
A. Streptococcus mutans
B. Streptococcus salivarius
C. Streptococcus pyogenes
D. Veilonella parvula
E. Staphylococcus epidermidis

76. Planned mass vaccination of all newborn 5-7 day old children against
tuberulosis plays an important role in tuberculosis prevention. In this
case the following vaccine is applied:
A. BCG
B. Diphteria and tetanus toxoids and pertussis vaccine
C. Diphtheria and tetanus anatoxin vaccine
D. Adsorbed diphtheria vaccine

77. A 4-year-old child presents with general weakness, sore throat and
deglutitive problem. After his examination a doctor suspected diphtheria
and sent the material to the bacteriological laboratory. In order to determine
the diphtheria causative agent the material should be inoculated into the
following differential diagnostic medium:
A. Blood tellurite agar
B. Endo's agar
C. Ploskyrev's agar
D. Sabouraud's agar
E. Levenshtein-Yessen agar