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Table 2 Guidelines for the classification of MLSI entries by risk setting for BC site (2010–2012)

From: Using environmental health officers’ opinions to inform the source attribution of enteric disease: further analysis of the “most likely source of infection”

MLSI risk setting classification

Definition

Private home

Exposure occurred in a private home

Includes:

Home-prepared food

Food premises

Any place where food intended for public consumption is sold, offered for sale, supplied, handled, prepared, packaged, displayed, served, processed, stored, transported or dispensed [21]

Includes

Popular expressions for food offered at establishments; “Chinese food” or “food item from Korean BBQ”

Farm

Farm and farm animal exposure

Excludes:

Exposures that are related to an occupation

Exposures that are explicitly stated to have occurred at home e.g. “home farm”

Recreational

Local travel: petting zoo; pumpkin patch or park; activities including hiking, camping, hunting, recreational water contact or gardening; or exposure to lakes/rivers/creeks

Excludes:

Exposures that are explicitly stated to have occurred at home e.g. “gardening at home”; this should be classified as private home

Food exposure during recreational activity e.g. food at a fair

Institutional

Long-term care facility, hospital, day care, support care facility

Workplace

Implied or directly stated work/occupational exposure

Includes:

Food consumed at work

Domestic travel

Exposure during travel outside Fraser Health Services Delivery Areas plus areas 38, 161, 162, 163, 164, 165, 166, 44, and 45 [20]

Other

Short-term stay shelter

Unclear

Where setting for an MLSI is not provided or is ambiguous