Colloquium Flashcards
The technological process of pig fattening is performed at the temperature
58-65 ° C
In the slaughterhouse processing of small ruminants, the thoracic organs remain in anatomical contact with the liver and are left hang over the sternum
TRUE
Cooling of poultry carcasses in cold water (spin chiller technique) is
Forbidden
Describe the procedure and purpose of performing a cooking test
Put 10-12 g of minced meat (0.5 x 0.5 cm) in Erlenmeyer flask, pour over 100 ml of cold water and cover with a watch glass, heat gently on a flame and determine the odor (vapor) of each minute at 10-15 cm distance from the flask itself (heating 5 min, cooking 5 min, cooling 10 min), we evaluate the color and smell of the broth and thus determine the freshness of the meat
In the process of determining the pH of meat, a value of 5.9 was determined. This indicates to us that the meat sample is
Fresh
Microbiological criteria for surface swabs are determined
Type of surface to be sampled (wood, metal, plastic, etc
For microbiological examination, samples should
Freeze immediately after sampling - it’s incorrect
Circle incorrectly: In ungulates
Masticatory muscles are incised
When sending poultry to a slaughterhouse, is an individual travel document issued for poultry?
FALSE
The CO2 concentration for stunning pigs must be at least
80%
Describe the examination of the esophagus, and when it is necessary to incise it?
- The esophagus is examined only by inspection and, if necessary, it is incised in case of suspicion of pathology process / infectious disease (such as suspicion or finding of jaundice)
- when examining the abdominal organs, it is also palpated
In the process of determining the freshness of meat with Nessler’s reagent in fresh samples of meat colors solution varies from
a. Does not change
In the benzidine procedure for determining the bleeding of meat in well-bled samples develops light blue color. Why?
Because there is less hemoglobin that reacts with benzidine
Sampling areas of pig carcasses according to EU regulations for the determination of enterobacteria are:
Head (cheek), thigh, middle thigh, abdomen
How to prepare the basic dilution for microbiological examination of a food sample (describe the procedure)
a food sample of at least 10 g or 10 ml is taken and 90 ml of the preparation solution is added, dilution or ratio of food and solution 1: 9
Slaughterhouses must have sanitation equipment supplied with at least hot water:
82 ° C (or 83 ° C depending on what is offered)
All bovine animals must be searched for BSE
- Showing signs of central nervous system disorders regardless of age
- All bovine animals originating in Romania, Bulgaria and third countries over 24 and 30 months of age
- Older than 48 months
Describe the anatomical position (location) where the stunning gun is placed when stunning cattle?
- The front part (top) rests on the frontal bone at the intersection of the diagonals that connect the opposite outer eye angle and horn base
- Aim down the spine
The septum cordis of cattle is incised due to the finding of developmental stages (larvae, eggs) of tapeworm;
Cysticercus bovis
List at least 3 meat freshness assessment procedures
- Physical (determination of meat pH and meat depletion and determination of the amount of excreted meat extract)
- Chemical (determination of ammonia and hydrogen sulfide)
- Biological (bacteriological examination and microbiological examination-cultural)
- Histological procedures
The “drip loss” procedure determined a loss of meat juice of 6%. This means that the meat is
- Exudative
- each loss of meat juice> or = 5% means that the meat is watery
The following is added to Kundrat agar to prove antimicrobial drug residues
Bacillus stearothermophylus
Area of individual sampling from which the swab is taken from the carcass of slaughtered bovine animals amounts to
- 100 cm2
- it is taken from 4 places (neck, chest, loins, croup) so that it is at least 400 cm2 in total
NH3 methods
- enumerate according to Schonberg and Voljferc, and there is also a microdiffusion procedure for determining ammonia according to Schmidt
- Schonberg: put a piece of meat in a porcelain bowl, pour Nessler’s reagent, protein breakdown = color changes: yellow → smaller amounts of NH3, orange → larger amounts of NH3
- Voljferc: 2 test tubes, pipette 1 ml of meat extract into the first, 1 ml of distilled water into the second, pipette the Nessler’s reagent (drop by drop, up to a maximum of 10 drops) until the color changes depletion and occurrence of sediments, interpretation of results