Past q Flashcards
Which statement is True for Salmonella? A. Indol production is negative B. Voges-Proskauer test is positive C. Lacotse-Fermentation is positive D. H2S production is positive
A,D
Which statement is False for Listeria monocytogenes?
A. Catalase test is positive
B. Rhamnose negative
C. Its typical colonies on ALOA agar are blue
D. Shows summer saulting motility at 25°C
B
Which statement is False for E.coli? A. Citrate utilization test is positive B. Indole test is positive C. Voges-Proskauer test is negative D. Methyl red test is positive
A
Enterococcus faecalis can grow: A. Between 10-60°C B. At pH 2.6 C. At 6.5% salt concentration D. Grow on blood agar with 70% bile content
C
Which statement if False?
A. Limulus test is suitable for detection of Gram-bacteria
B. Impedance measurement works with special media only
C. The microbial count can be determined by detecting the amount of ATP
D. The redox potential of the medium decreases during the bacterial growth
C
Which statement is True?
A. Enterococcus faecalis is catalase positive
B. Staphylococcus aureus is cultured in Fraser broth
C. Positive colonies of E.coli are bluish green on TBX agar
D. Enterobacteriaceae cannot ferment glucose
C
Which statement is False?
A. Listeria monocytogenes’ b-haemolysis strengthens the haemolysis of
Staphylococcus aureus
B. Salmonella colonies are reddish purple on XLD agar
C. Salmonella decomposes lactose
D. MRSV agar can be used instead of RVS broth in the enrichment procedure of
Salmonella
C
Which statement is True for Clostridium perfringens? A. Cultured on Sulphite cycloserine agar B. B and C strains pathogenic for humans C. In LS broth incubated at 25°C D. No haemolysis on blood agar
A
Which statement is False?
A. Selective media of moulds have low pH
B. Enterococcus faecalis is one of the most resistant among the non-spore forming
microbes
C. Enterococcus faecalis is catalase positive
D. E.coli can ferment lactose
C
Which statement is True for Staphylococcus aureus? A. Produces toxin between 8-45 B. Reduces the nitrate to nitrite C. No haemolysis on blood agar D. Gram negative
B
What are the suitability of sampling based on suspicion and annual monitoring plan?
Write the letters to the adequate line:
A) It is used to inspect the cause of foodborne disease
B) It is used to determine the drug residues in the food
C) It is used to investigate the chemical contaminants of the food
D) It is used to detect the poisonous source
Sampling based on suspicion: A, D
Sampling based on monitoring plan: B, C
Classify the different screening methods: A) Meatsafe test B) KIS test C) Brilliant black reduction test D) Snap test
Microbial growth inhibition test: KIS, Brilliant black reduction test – B, C
Receptor based tests: Snap-test, Meatsafe test – A, D
Which statement is False for Sulphite reducing Clostridia and Clostridium perfringes?
A. Obligate anaerobic, spore forming bacteria
B. Most representative is Clostridium botulinum, which is natural member of fecal
microflora
C. Spore can survive in the water for long time and are highly resistant to
disinfection
D. Presence in drinking water indicates the possibility of protozoa cysts and defects
of filtering process
B
Which statement is False for heterotrophic aerobic bacteria?
A. Determined at 15°C and 37°C
B. Long term examination can be used for control the treatment of water
C. Sudden increase in the number refers to a defect in the water treatment
D. Carried out by pour plate method
A
Which statement is True for total coliforms?
A. Associated with a more or less fecal contamination
B. Direct indicators of fecal contamination nor have health risk
C. Presence in drinking water indicates the possibility of protozoa cysts
D. Belonging to the Streptococcaceae family
A
