Mod 4 Notes - Food Safety The Bad Bugs Lesson 13 Food-Borne...

Info icon This preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Food Safety: The Bad Bugs Lesson 13: Food-Borne Disease What Is Food-Borne Disease? Define food-borne disease. When a person becomes ill after ingesting a contaminated food. Food-borne diseases are caused by consuming pathogens (disease-causing microbes) in contaminated food or drinks. Define the two types of food-borne diseases. Food poisoning occurs when a microorganism grows in the food and produces some sort of toxin. You eat the food containing the toxin and get sick; the microorganism does not have to be present within you for you to become ill, as it is the toxin that causes the problem, not the microorganism. The severity of the illness depends on the amount of toxin that is consumed, the chemical nature of the toxin, and how reactive and toxic it is. Food infection is caused by microorganisms or bacteria that are present in the food; when the food is ingested, the bacteria end up in the person’s digestive tract and invade the intestinal lining. It is this invasion that produces the illness, usually leading to vomiting and/or diarrhea. Bacteria in Food What are the various ways to identify harmful bacteria? Staining. The bacteria is stained with dye; the resulting color identifies the structure of the cell wall and membrane and helps in the initial identification of the bacteria. Biochemical testing. This testing helps identify the genus of the microorganism. Serology. This is the study of blood serum, and is used to identify if, or how, the immune system is reacting to a bacteria. Genetic testing. This is the most specific and costly testing, and requires DNA mapping to distinguish one bacterium from another.
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
The Salmonella family What is the most common food host for salmonella? Poultry, especially from eating undercooked or raw eggs. List the symptoms of salmonella poisoning. Flu-like ailments, such as nausea, fever, headache, and diarrhea How long after ingestion do symptoms usually appear? 12 to 24 hours after the organism is ingested What do the most common cases of salmonella come from? Poultry, especially from eating undercooked or raw eggs. Infamous Outbreaks Caused by Salmonella Causes of Food Contamination List all the conditions and practices that can cause food contamination. Exposing food to contaminated water . Water can carry harmful organisms, especially if it is contaminated with human or animal fecal matter. One hypothesis as to why certain pathogens have been found in fruits and vegetables is that fecal matter from farm animals runs into streams, and the stream water is then used to irrigate crops. In addition, water used to wash food can be a source of contamination. Poor personal hygiene . Common sense dictates that you wash your hands before preparing food.
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern