1 / 9

MICROBIAL FOOD SAFETY A FOOD SYSTEMS APPROACH

MICROBIAL FOOD SAFETY A FOOD SYSTEMS APPROACH. Charlene Wolf-Hall and William Nganje. Chapter 9 : Viruses and Prions . Key Questions. What is a virus? What is a prion? What viruses and prions are of most concern for microbial food safety?

jkuntz
Download Presentation

MICROBIAL FOOD SAFETY A FOOD SYSTEMS APPROACH

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. MICROBIAL FOOD SAFETYA FOOD SYSTEMS APPROACH Charlene Wolf-Hall and William Nganje

  2. Chapter 9: Viruses and Prions

  3. Key Questions What is a virus? What is a prion? What viruses and prions are of most concern for microbial food safety? What controls can prevent foodborne illness due to viruses and prions?

  4. Viruses and Prions Not Alive? • Require a host biochemical machinery to replicate • Border between chemistry and life • Infectious agents

  5. Hepatitis A Virus Infects humans and primates

  6. Noroviruses Virus Viral Infection • Fecal-oral transmission • Low infectious dose - ~18 particles • Vomiting and diarrhea

  7. Rotavirus Virus Viral Infection • Fecal-oral transmission • Low infectious dose - ~10 particles • Vomiting and diarrhea

  8. Prions Proteinaceous, infectious particles Infection - transmissible spongiform encephalopathies • Proteins that can remain biologically active through varying environmental and processing conditions • Deadly neurodegenerative disease • Scrapie in sheep • Chronic wasting disease (CWD) in deer • Bovine spongiform encephalopathy (BSE) in cattle; also known as mad cow disease • Creutzfeldt-Jakob disease (vCJD) in humans

  9. THANK YOU Name: Charlene Wolf-Hall & William Nganje Email: charlene.hall@ndsu.edu & William.Nganje@ndsu.edu

More Related