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Case Studies

The NCCEH has assembled a directory of scenarios on various environmental health topics intended to sharpen the problem-solving skills of practitioners and students. We welcome your use of our feedback form to share new questions and scenarios.

Paralytic Shellfish Poisoning

Trigger for Investigation On June 18, 2010 a commercial harvester advised an inspection specialist at CFIA of four cases of suspect PSP-related illness that occurred June 17, 2010. CFIA began an investigation and trace-back and advised relevant public health authorities of illnesses to ensure follow-up of cases. You are the epidemiologist working at the local health authority where the cases...

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Pepper Spray in the Indoor Environment and in the Vicinity of Food Products and Preparation Surfaces

Pepper spray is discharged during an attempted robbery of a jewellery store in a large urban mall.  The robbery site is located next to the mall’s food court.  For several days, mall patrons continue to report uncomfortable symptoms (e.g., burning sensation in their eyes and throat) when they enter the food court.  Public Health Inspectors (PHIs) are asked to respond to concerns about...

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