Hurdle Concept in Food Preservation

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What is one of the preventive measures mentioned for producing and harvesting food?

Implement safe agricultural practices

Which method mentioned in the text can be used to kill pathogens during food processing?

Pasteurization

What technique is recommended in the text to prevent cross-contamination during food distribution?

Regulating and monitoring temperature

What concept is suggested to be applied during food processing to enhance safety?

<p>Hurdle concept</p> Signup and view all the answers

What is a key aspect of training for food handlers according to the preventive measures for preparing foods?

<p>Proper hand-washing procedures</p> Signup and view all the answers

Which method mentioned in the preventive measures for producing and harvesting food involves keeping the harvest free of contamination?

<p>Implementing safe agricultural practices</p> Signup and view all the answers

What is a recommended practice for ensuring quality in processing foods?

<p>Implementing HACCP and other quality systems</p> Signup and view all the answers

What is the water activity level that is most conducive to the growth of gram-negative bacteria?

<p>0.95</p> Signup and view all the answers

Which type of bacteria thrives in an environment with a water activity level of 0.75?

<p>Halophilic bacteria</p> Signup and view all the answers

In which moisture category would you classify flour according to its water activity level?

<p>Low moisture food (aw below 0.6)</p> Signup and view all the answers

Which type of food is more likely to spoil easily due to its high water activity level?

<p>Processed meat</p> Signup and view all the answers

What is the water activity level that is most conducive to the growth of moulds?

<p>0.80</p> Signup and view all the answers

How does the presence or absence of oxygen impact the redox potential in the environment where food is stored?

<p>Increases the redox potential</p> Signup and view all the answers

What role do saprophytic microorganisms play in the context of food?

<p>Play a role in biodegradation and cause food spoilage</p> Signup and view all the answers

Which bacterial group includes members that can survive at a very low pH?

<p>Aciduric Bacteria</p> Signup and view all the answers

What is the main characteristic of Gas-Producing Bacteria among the important bacterial groups in foods?

<p>Production of carbon dioxide, hydrogen, and hydrogen sulfide</p> Signup and view all the answers

Which genera of bacteria mentioned are characterized as negative rods and motile?

<p>Citrobacter, Escherichia, Enterobacter</p> Signup and view all the answers

What is the common respiration characteristic of the genera Bacillus, Clostridium, and Sporolactobacillus?

<p>Facultative anaerobes</p> Signup and view all the answers

Which bacterial group includes members that can grow at high temperatures?

<p>Thermophilic Bacteria</p> Signup and view all the answers

What is the main difference between foodborne intoxication and foodborne infection as discussed in the text?

<p>Foodborne intoxication is caused by toxins produced by microbes, while foodborne infection is caused by the microbes themselves.</p> Signup and view all the answers

Which symptom is NOT typically associated with foodborne intoxication according to the text?

<p>Rash</p> Signup and view all the answers

What environmental factor is essential for microbes to cause food spoilage?

<p>Moisture</p> Signup and view all the answers

Which of the following signs is NOT commonly associated with food spoilage as described in the text?

<p>Acidity</p> Signup and view all the answers

What is the primary outcome of the sequence of events in food spoilage as outlined in the text?

<p>Production of enzymes</p> Signup and view all the answers

How does food spoilage due to gas formation manifest according to the text?

<p>Swollen packages and cans</p> Signup and view all the answers

What is the primary objective of applying high temperature as a hurdle in food processing?

<p>To reduce microbial activity</p> Signup and view all the answers

What is a disadvantage of using low temperature as a hurdle in food processing?

<p>It is costly to maintain low temperatures</p> Signup and view all the answers

Which hurdle technology involves techniques like concentration, dehydration, and freeze drying?

<p>Water activity</p> Signup and view all the answers

What does the term 'Redox Potential' refer to in the context of hurdle technology?

<p>A measure of oxidation-reduction reactions</p> Signup and view all the answers

Why is the hurdle of competitive flora important in food protection?

<p>To reduce spoilage rate caused by mold &amp; yeast</p> Signup and view all the answers

Which hurdle technology aims at preserving food products through the use of preservatives?

<p>Competitive Flora Hurdle</p> Signup and view all the answers

Which microorganism is known for causing acute gastroenteritis in humans and was named after an outbreak in Norwalk, Ohio in 1968?

<p>Norovirus</p> Signup and view all the answers

Which microorganism associated with foodborne illnesses can be sourced from contaminated shellfish and seafood, as well as person-to-person transmission?

<p>Staphylococcus aureus</p> Signup and view all the answers

Which microorganism, characterized by being gram-negative and non-spore-forming, has many serotypes that can cause illness in humans?

<p>Salmonella</p> Signup and view all the answers

Which microorganism is commonly associated with foodborne illnesses, with symptoms typically appearing 1-2 days after consumption and including diarrhea, abdominal cramping, nausea, and vomiting?

<p>Norovirus</p> Signup and view all the answers

Which of the listed microorganisms is predominantly associated with symptoms such as abdominal pain, diarrhea, nausea, and vomiting starting 8-12 hours after consumption?

<p>Salmonella</p> Signup and view all the answers

Which microorganism causes symptoms that include abdominal cramping, diarrhea, nausea, vomiting, headache, and low-grade fever that can last up to 7 days?

<p>Norovirus</p> Signup and view all the answers

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