Test 1.2 Flashcards
Which statement is true for salmonella?
- Indol production is -ve.
- H2S production is +ve.
Which statement is false for L. monocytogenes?
Rhamnose -ve.
Which statement is false for E.coli?
Citrate utilisation test is +ve.
Enterococcus faecalis can grow:
On blood agar with 70% bile content.
Which statement is false?
The microbial count can be determined by detecting the amt of ATP.
Which statement is true?
+ve colonies of E.coli are bluish green on TBX agar.
Which statement is false?
Salmonella decomposes lactose.
Which statement is true for Cl. perfringens?
Cultured on sulphite cycloserine agar.
Which statement is false?
Enterococcus faecalis is catalase +ve.
Which statement is true for Staph aureus?
Reduces nitrate to nitrite.
What is the suitability of sampling based on suspicion + annual monitoring plan? Write the letters to the adequate line:
- Sampling based on suspicion:
> It is used to inspect the cause of foodborne disease.
> It is used to detect the poisonous source. - Sampling based on monitoring plans:
> It is used to determine the drug residues in the food.
> It is used to investigate the chemical contaminants of the food.
Classify the different screening methods:
- Microbial growth inhibition test: > KIS test. > Brillant black reduction test. - R- based test: > Meatsafe test. > Snap test.
What is the quantity of 1 sample based on the legal regulation in case of the foods below? Pair the sample with the adequate quantity:
- Cow milk: 500ml.
- Turkey meat, Mammal fat: 500g.
- Stone fruit: 1kg.
What are the characteristics to the objective inspection program + the selective control?
- Objective inspection program:
> It is used to survey attributes of food.
> The results of the investigation are valid for the whole population. - Selective control:
> It is used to screen the non- compliant items occurring rarely.
> The sample is selected by targeted risk evaluation.
Classify the different screening method:
- Microbial growth inhibition method: > Delvotest. > 4 plate method. - R- base test: > Rosa test. > ß- based test.
What is the quantity of 1 sample based on the legal regulation in case of the food below?
- Milk: 500ml.
- Mammal meat, sausage: 500g.
- Pulse: 1 kg.
What is ø true for gas chromatography?
It has higher resolution capacities than liquid chromatography.
What is the mains bottleneck of molecular spectroscopy?
Only 1 compound can give a signal in the given wavelength.
Which 1 is ø characteristic of indicator organisms?
They are obligate pathogens.
Which statement is true for P. aeruginosa?
Occurs in faeces, soil, H2O + waster H2O.
Which statement is false for sulphite reducing Clostridia + Cl. perfringens?
Most representative is Cl. botulinum, which is a natural member of faecal microflora.
Which statement is false for heterotrophic aerobic bacteria?
Determined at 15ºC + 37ºC.
Which statement is true for total coliforms?
Associated with a more/ less faecal contamination.
Which statement is true for the organic acids as preservatives?
The effectiveness of the preservatives depends on the conc temp.
Which statement is true for the H2O removal?
Reducing the H2O activity inhibits the multiplication of microorganisms.
Which statement is true for the heat treatment?
The most commonly used preservation method in the food industry.
The typical spoilage flora of meat products are?
Micrococci, Lactobacilli.
The typical spoilage flora of bakery products are?
Moulds.
Which one is characteristic of indicator organisms?
Should be informative in all types of H2O.
Which statement is false for P. aeruginosa?
Can be used as an indicator of faecal contamination.
Which statement is true for sulphite reducing Clostria + Cl perfringens?
Spores can survive in H2O for a long time + are highly resistant to disinfection.
Which statement is true for heterotrophic aerobic bacteria?
Long term examination can be used for control of the treatment of H2O.
Which statement is false for total coliforms?
Direct indicators of faecal contamination/ or have health risk.
Which statement is false for the organic acids as preservatives?
At low pH value the degree of dissociation is higher.
Which statement is false for the H2O removal?
The bacteria can grow < 0.7 aw.
Which statement is false for the heat treatment?
All of the vegetative cells can be eliminated with 60º
cheat treatment.
What part of the electromagnetic radiation spectrum can be used for analytical purpose
The UV. visible, infrared +floor covered + x- rays parts/
The main bottleneck of mass spectrometry?
It is suitable only for structure analysis of chemically clean marrials,
