3/13/2016 Learning Objectives Food 1.Use basic biochemical characteristics to identify Staphylococcus aureus 2.Understand what conditions in foods favor 5. aureus growth Chapter 16 AN INTRODUCTION 3.Recognize,from symptoms and time of onset,a case of foodborne illness caused by5.aureus Staphylococcus 4.Choose appropriate interventions(heat, aureus preservatives,and formulations)to prevent the growth of 5.aureus 5.Identify sources of 5.aureus 6.Understand the roles of staphylococcal enterotoxins in causing foodborne illness Outbreak Outbreak Flight of horror Flight of horror Flight left Alaska and passengers were served breakfast .80%of passengers had diarrhea Breakfast was an omelet with ham and .70%of passengers had vomiting cheese ·85%had nausea About 30 min after eating,a passenger The"discomfort bags"ran out rushed to the rear of the plane vomiting on passengers before reaching the toilet After landing,rectal swabs were done Most of the passengers streamed for the on some passengers and tested positive 4 available toilets for Staphylococcus aureus and its toxin 250 passengers with vomiting and diarrhea 5.aureus and toxin were also found in and only 4 toilets the ham and cheese3/13/2016 1 Chapter 16 Staphylococcus aureus Learning Objectives 1. Use basic biochemical characteristics to identify Staphylococcus aureus 2. Understand what conditions in foods favor S. aureus growth 3. Recognize, from symptoms and time of onset, a case of foodborne illness caused by S. aureus 4. Choose appropriate interventions (heat, preservatives, and formulations) to prevent the growth of S. aureus 5. Identify sources of S. aureus 6. Understand the roles of staphylococcal enterotoxins in causing foodborne illness Outbreak Flight of horror • Flight left Alaska and passengers were served breakfast • Breakfast was an omelet with ham and cheese • About 30 min after eating, a passenger rushed to the rear of the plane vomiting on pg g assengers before reaching the toilet • Most of the passengers streamed for the 4 available toilets • 250 passengers with vomiting and diarrhea and only 4 toilets Outbreak Flight of horror • 80% of passengers had diarrhea • 70% of passengers had vomiting • 85% had nausea • The “discomfort bags” ran out • After landing, rectal swabs were done on d t t d iti some passengers and tested positive for Staphylococcus aureus and its toxin • S. aureus and toxin were also found in the ham and cheese