Which of the following groups of microbes is most likely to be associated with humans? A   psychrophiles. B   thermophiles C   hyperthermophiles D   mesophiles.

What type of microbes can not be effectively killed by low temperature (i.e. freezing) treatment? methogens thermophiles mesophiles psychrophiles halophiles

Sterility: is achieved by most disinfectants and antiseptics (i.e., chemical agents) O is achieved by soap and water is the absence of PATHOGENS or spoilage-causing microbes ONLY Cannot be achieved by ethylene oxide O CANNOT be achieved by autoclaving O is the absence of ALL living cells and endospores

Based on only the given information, which organism is likely most resistant to thermal sterilization?     Org X, Z-value of 10.0 °C     Org Y, Z-value of 2.0 °C     Org Z, a mesophile     Org K, a psychrotroph

Human pathogens are generally which type of microbe?A. barophileB. halophileC. mesophileD. thermophileE. psychrophile

Explain what is happening with this graph that charts the reactions ofa mesophilic bacterium to temperature. Blue shows the survival curveand brown the growth curve under various temperatures.

How would you classify each microbial sample (A, B & C) based upon the growth seen in each environment? (ex. Psychrophile)

1. Where is staphylococcus aureus commonly found? 2. What staphylococcus aureus  its significance in medical microbiology?  3. Is staphylococcus aureus an obligate aerobe or facultative anaerobes?  4. can staphylococcus aureus  catabolism glucose or lactose? Does it produce strong acid products such as lactic or acetic acid?  5. Does staphylococcus aureus produce by product that are converted to alcohols?

Most pathogens are found in this temperature group. O Psychrophile Mesophile O Thermophile

Spores and toxin-producing microorganism produce toxins need higher Aw than minimum Aw for microbial growth. How could food industry benefit from this fact?