Table of Contents
Why do pathogens need oxygen?
Bacteria that require oxygen to grow are called obligate aerobic bacteria. In most cases, these bacteria require oxygen to grow because their methods of energy production and respiration depend on the transfer of electrons to oxygen, which is the final electron acceptor in the electron transport reaction.
What is Salmonella typhi commonly linked with ground beef?
True or false: Salmonella Typhi is commonly linked with ground beef. False: Salmonella Typhi is commonly linked with poultry. Ready to Eat foods and beverages. Beverages, RTE food, Contaminated water.
What are the three types of contamination?
The three types of contamination are biological, physical, and chemical.
Which pathogen is commonly linked with ground beef and also produce?
The Microworld
| A | B |
|---|---|
| Shiga toxin-producing E. coli | While commonly linked with contaminated ground beef, what pathogen has also been linked with contaminated produce? |
| Cooking food to the right temperature | Which practice can reduce Salmonella spp. in poultry to safe levels? |
What does pathogens need to grow?
Foodborne pathogens grow best in temperatures between 41 to 135 °F (5 to 57 °C), a range referred to as the temperature danger zone (TDZ). They thrive in temperatures that are between 70 to 104 °F (21 to 40 °C). Almost all foodborne pathogens are aerobic, that is requiring oxygen to grow.
What do pathogenic bacteria need to grow?
Moisture – Bacteria need moisture in order to grow. This is why they grow on foods with high moisture content such as chicken. Suitable pH – Most bacteria reproduce best at a neutral pH level of 7. Acidic foods with a pH below 7, or alkaline foods with a pH above 7, may stop or slow down the rate of bacterial growth.
Is scrambled shell eggs a TCS food?
Choose whether or not the following foods need Time-Temperature Control for Safety….CH 1: TCS or Non-TCS Foods.
| A | B |
|---|---|
| scrambled eggs | TCS |
| whole wheat bread | not TCS |
| uncooked rice | not TCS |
| sliced watermelon | TCS |
Should you use antiseptic before washing hands?
Hand antiseptics should be used only after proper hand washing has been completed. Handwashing with soap and water is the single most effective way to prevent the spread of bacteria and viruses-the major causes of foodborne illness. Hand antiseptics are effective in killing bacteria and some viruses on clean hands.
What are six conditions that pathogens need to grow?
FAT TOM is a mnemonic device used in the food service industry to describe the six favorable conditions required for the growth of foodborne pathogens. It is an acronym for food, acidity, time, temperature, oxygen and moisture.
Do pathogens need light to grow?
Energy is necessary to fuel work inside the cell. Some bacteria get their energy from sunlight using unique metabolic methods. Scientists who grow bacteria in a laboratory use concentrated growth media containing readily available carbon, nitrogen, sulfur and phosphorus along with many vitamins and minerals.
Why do plants breathe out oxygen?
Plants do breathe – they give out carbon dioxide and absorb oxygen from the air that surrounds them. Their tissues respire just as animal tissues do. Plants, however, do not have lungs or a blood stream, so we cannot say that they breathe in the same way as animals.
What are the optimal conditions for bacterial growth?
Although bacteria are good at adapting to their environments, certain conditions promote bacterial growth more than others. These conditions include temperature, moisture, pH and environmental oxygen.
What are the growth requirements for bacteria?
Bacterial Growth. Bacterial are very diverse and quite adaptable, but they still need certain factors in order to thrive. The physical requirements for bacterial growth include pH range, temperature, oxygen concentrations, moisture levels, hydrostatic pressure, osmotic pressure, and radiation levels.