MIDTERM 1 (2024) ✅ Flashcards
Which parameters are requirements of the examination of drinking water (2020/2184 EU directive)? (2 good answers)
a. Pseudomonas Aeruoginosa
b. Salmonella?
c. E. coli
d. Intestinal enterococci
c. E. coli
d. Intestinal enterococci
What is a food arena in brief?
a. Food overconsumption
b. Food production and supply system
c. Food authority education platform
d. ‘Sports food’ for special nutritional needs
b. Food production and supply system
What is true about the impedance measurement
a. It can only be used for sterility test (presence/absence)
b. The microbial activity increases the impedance
c. The sharpness of the drop in the impedance correlates with the initial cell count?
d. It requires minimum 3 days incubation
b. The microbial activity increases the impedance
If the concentration exponent of a chemical disinfectant is high (e.g 10)
a. It is not authorized in the EU
b. It requires a high concentration
c. It greatly loses its efficiency with dilution
d. It destroys the microbes more rapidly
c. It greatly loses its efficiency with dilution
For which foods should the annual No of sample be determined based on the production figure of the previous year? (MCQ)
a. Fish
b. Swine
c. Sheep
d. Honey
b. Swine
A. Fish
For which foods should the annual no of sample be determined based on the production figure of the previous year (MCQ)
a. Rabbit meat
b. Egg
c. Sheep
d. Cattle
c. Sheep
d. Cattle
For which foods should the annual no of sample be determined based on the production figure of the previous year (MCQ) - unsure
a. Swine
b. Cattle
c. Broiler chicken
d. Turkey
C. Broiler
For which foods should the annual no of sample be determined based on the production figure of the previous year (MCQ)
a. Game meat
b. Cow milk
c. Swine
d. Cattle
B. Cow milk
Which of the following statements is false
a. Veterinarians have no role in risk communication
b. Foods play an important role in maintaining health
c. Most of the consumers are price sensitive
d. Consumers demand towards the quality and safety of food
a. Veterinarians have no role in risk communication
Which of the following statements is false about creating a 10-fold serial dilution
a. The pipette tips must be changed before each pipetting
b. It is required for presence/absence, e.g. Salmonella detection
c. The 1st dilution is created from the sample
d. Each tube has to be mixed before pipetting
b. It is required for presence/absence, e.g. Salmonella detection
For what purpose is sampling based on the annual monitoring plan suitable (MCQ)
a. It is used to detect the poisonous source??
b. It is used to inspect the cause of foodborne disease??
c. It is used to determine the drug residue in the food
d. It is used to investigate the chemical contamination of the food
c. It is used to determine the drug residue in the food
d. It is used to investigate the chemical contamination of the food
For what purposes is sampling based on suspicion suitable (MCQ)
a. It is used to inspect the cause of foodborne disease
b. It is used to determine the drug residue in the food
c. It is used to investigate the chemical contamination of the food
d. It is used to detect the poisonous source
a. It is used to inspect the cause of foodborne disease?
d. It is used to detect the poisonous source?
Which method is not used for the examination of solid samples -
a. Membrane filtration
b. MPN method
c. Pour plate method
d. Spread plate method
a. Membrane filtration (for liquid samples instead)
Which products are mostly commonly treated with irradiation in the EU
a. Raw meat
b. Milk
c. Fresh salads
d. Spices
d. Spices
From which foods 500g sample must be taken (MCQ)
a. Mammal meat
b. Sausage
c. Milk
d. Pulse (leguminous)
a. Mammal meat
b. Sausage
From which foods 500g sample must be taken (MCQ)
a. Turkey meat
b. Stone fruit
c. Mammal fat
d. Cow milk
a. Turkey meat
c. Mammal fat
What is the ‘hazard characterisation’ step of risk assessment
a. Identification of biological, chemical and physical agents capable of causing adverse health effects
b. Calculation of the likelihood that a particular substance will cause harm in the light of the nature of the hazard and the extent to which people, animal, plants and/or the environment are exposed to it
c. Defining the nature of the adverse health effects associated with hazards which may be present in food
d. Evaluation of who, or what has been exposed to hazard and a quantification of the amounts involved
c. Defining the nature of the adverse health effects associated with hazards which may be present in food
What is the ‘hazard identification’ step of risk assessment:
a. Identification of biological, chemical and physical agents capable of causing adverse health effects
b. Defining the nature of the adverse health effects associated with hazards which may be present in food
c. Evaluation of who, or what, has been exposed to a hazard and quantification of the amounts involved
d. Calculation of the likelihood that a particular substance will cause harm, in the light of the nature of the hazard and the extent to which people, animals, plants and/or the environment are exposed to it
a. Identification of biological, chemical and physical agents capable of causing adverse health effects
What is the ‘exposure assessment’ step of risk assessment
a. Identification of biological, chemical and physical agents capable of causing adverse health effects
b. Defining the nature of the adverse health effects associated with hazards which may be present in food
c. Evaluation of who, or what, has been exposed to a hazard and quantification of the amounts involved
d. Calculation of the likelihood that a particular substance will cause harm, in the light of the nature of the hazard and the extent to which people, animals, plants and/or the environment are exposed to it
c. Evaluation of who, or what, has been exposed to a hazard and quantification of the amounts involved
What is the ‘risk characterisation’ step of risk assessment
a. Defining the nature of the adverse health effects associated with hazards which may be present in food
b. Evaluation of who, or what, has been exposed to a hazard and a quantification of the amounts involved
c. Calculation of the likelihood that a particular substance will cause harm, in the light of the nature of the hazard and the extent to which people, animals, plants and/or the environment are exposed to it
d. Identification of biological, chemical, and physical agents capable of causing adverse health effects
c. Calculation of the likelihood that a particular substance will cause harm, in the light of the nature of the hazard and the extent to which people, animals, plants and/or the environment are exposed to it
What is true about the redox potential measurement:
a. It is used to determine the endotoxin contamination of a sample
b. It can’t be used for the determination of cell count
c. If the sample has high contamination, the Time to Detection is shorter than in less contaminated samples
d. Redox potential is increased by microbial activity
c. If the sample has high contamination, the Time to Detection is shorter than in less contaminated samples
What are possible ways to avoid biofilm formation in the food industry (one false answer)
a. With the use of monophasic compositions
b. With the rotation of disinfectants
c. By applying smooth surfaces
d. With multiple repetitions of the cleaning-disinfection cycle
a. With the use of monophasic compositions
How do we control salmonella
a. By heat treatment
b. With control programs at livestock level and legal microbiological limits
c. With legal microbiological limits only
d. With control programs at livestock level only
b. With control programs at livestock level and legal microbiological limits
Which parameters are not indicators of fecal contamination of water (2 good answers)
a. Aerobic colony count
b. Pseudomonas aeruginosa
c. E. coli
d. Enterococcus fecalis
a. Aerobic colony count
b. Pseudomonas aeruginosa
Which foods can be contaminated during the primary production (MCQ)
a. Sausage
b. Vegetables
c. Cheese
d. Raw milk
b. Vegetables
d. Raw milk
Which foods can be contaminated during the primary production (MCQ)
a. Dry paste
b. Honey
c. Dairy products
d. Live bivalves
b. Honey
c. Dairy products
d. Live bivalves
Which foods can be contaminated during the primary production (MCQ)
a. Cereals (grains)
b. Spices
c. Yoghurt
d. Egg products
a. Cereals (grains)
b. Spices
Which foods can be contaminated during the primary production (MCQ)
a. Dairy products
b. Minced meat
c. Fruits
d. Egg
c. Fruits
d. Egg
Which materials will readily dissolve in water (2 good answers)
a. Apolar covalent compounds
b. Elements
c. Ions, ionic compounds
d. Polar covalent compounds
c. Ions, ionic compounds
d. Polar covalent compounds
Which statement is true for staphylococcus aureus:
a. As a gram-negative coccus, resistant to environmental influences
b. Coagulase-negative strains cause food poisoning
c. It produces heat-sensitive toxin
d. It produces heat-stable toxin
d. It produces heat-stable toxin
What is the basic principle of traceability:
a. Food business operation must use certain isotopes as indicators in case of some high-valued product types to prevent food adulteration and enable tracing the batches throughout the food chain
b. Food business operators must be able to trace their output batches until they are being consumed, used as feed or terminated
c. Food business operators should keep records on the source of their input materials and the consignee of their output batches
d. Food business operators must be able to trace back all products in their inventory up to the primary source (up to the soil)
b. Food business operators must be able to trace their output batches until they are being consumed, used as feed or terminated
How can water get in contact with food during food processing (during normal operation)? (2 good answers)
a. The natural water content of the raw material
b. Water used for cleaning the raw materials and equipment
c. In the form of rainwater
d. Leakages from the environment
a. The natural water content of the raw material??
b. Water used for cleaning the raw materials and ??
What are characteristics to the object inspection program? (MCQ)
a. The sample is selected by targeted risk evaluation
b. The results of the investigation are valid for the whole population
c. It is used to survey the attributes of food
d. It is used to screen the non-compliant items occurring rarely
b. The results of the investigation are valid for the whole population
c. It is used to survey the attributes of food
What are characteristics to the selective control plan? (MCQ)
a. The sample is selected by targeted risk evaluation
b. It is used to screen the non-compliant items occurring rarely
c. It is used to survey the attributes of food
d. The results of the investigation are valid for the whole population
a. The sample is selected by targeted risk evaluation
b. It is used to screen the non-compliant items occurring rarely
We used pour plate method to determine the total viable cell count of milk. We found 100 colonies in the 1st dilution. What was the initial cell count of the sample:
a. 10 cfu/ml
b. 1.0 x 10^-5 cfu/ml
c. 1.0 x 10^3 cfu/ml
d. 1.0 x 10^4 cfu/ml
(initial cell count = (number of colonies in dilution) x (dilution factor), so initial cell count = 100 colonies x 10 (1:10dilution) = 1000 cfu/ml
c. 1.0 x 10^3 cfu/ml
What is false about the examination of protein traces?
a. It is commonly used with immunofluorescence to find pathogenic bacteria
b. Its basis is the biuret reaction
c. Its semi-quantitative, the contamination can be estimated based on the strength of the color change
d. It can be used for the examination of a surface after cleaning
a. It is commonly used with immunofluorescence to find pathogenic bacteria
What is true about the direct microscopic counting/ what is true about the directive microscopic counting
a. With this method it is impossible to differentiate between dead and live cells
b. It requires 1 day incubation
c. It is most commonly applicable for blood cell counting
d. It is impossible to count bacteria with it
c. It is most commonly applicable for blood cell counting
For which foods should the annual no of sample be determined based on the number of animals slaughtered in the previous year? (MCQ)
a. Honey
b. Sheep
c. Swine
d. Fish
b. Sheep
c. Swine
For which foods should the annual no of sample be determined based on the number of animals slaughtered in the previous year (MCQ)
a. Sheep
b. Cattle
c. Rabbit meat
d. Egg
a. Sheep
b. Cattle
Which compounds are found in Group A to be tested as chemical substances during the chemical control? (MCQ)
a. Nitrofuran derivatives
b. Heavy metals
c. Environmental contaminants
d. Anabolic substances
a. Nitrofuran derivatives
b. Heavy metals
Which compounds are found in Group A to be tested as chemical substances during the chemical control? (MCQ)
a. Chloramphenicol
b. Sulphonamides
c. Steroid hormones
d. Sedatives
a. Chloramphenicol
c. Steroid hormones
Which compounds are found in Group A to be tested as chemical substances during the chemical control? (MCQ)
a. Nitroimidazole derivatives
b. Antibacterials
c. Non-steroidal anti-inflammatory drugs
d. Stilbenes
a. Nitroimidazole derivatives
d. Stilbenes
Which compounds are found in group B to be tested as chemical substances during the chemical control? (MCQ)
a. Chloramphenicol
b. Sedatives
c. Steroid hormones
d. Sulphonamides
b. Sedatives
d. Sulphonamides
Which compounds are found in Group B to be tested as chemical substances during the chemical control (MCQ)
a. Thyreostatics
b. Mycotoxins
c. Beta-agonists
d. Anthelmintics
b. Mycotoxins
d. Anthelmintics
Which is (are) true for fermentation:
a. A biological process that changes the properties of food while bacteria produce energy in absence of oxygen (with some exceptions)
b. A process when microorganisms produce energy from protein under anaerob conditions
c. Louis pasteur used it to describe life with oxygen
a. A biological process that changes the properties of food while bacteria produce energy in absence of oxygen (with some exceptions
Which of the following statements is true about the incubation of microbes
a. The incubation always happens in a special jar to provide special atmosphere
b. The plates should be incubated upside down
c. The plates should be incubated without their top
d. The incubation always happens at room temperature
b. The plates should be incubated upside down?
Which sentences are true about e.coli? (2 good answers)
a. Its detection from water samples is based on the presence of two enzyme
b. It must be examined in the water used in food businesses
c. It is able to reduce the 2,3,5-triphenyl tetrazolium chloride (TTC) to formazan
d. It is the indicator of low flow rate and general hygiene
b. It must be examined in the water used in food businesses
c. It is able to reduce the 2,3,5-triphenyl tetrazolium chloride (TTC) to formazan
Which of the following statements is true about the spread plate method?
a. It never requires a serial dilution
b. We evaluate the plates with the colony
c. 1ml inoculum is used for the plates
d. It can be only be used for liquid samples
c. 1ml inoculum is used for the plates