MLSI exposure classification | Definition |
---|---|
Water | Consumption or physical contact with water through activities such as swimming |
Food | Any beverage or food item for human consumption |
Includes: | |
Spoiled/contaminated food | |
Food events in which consumption of food or beverages is assumed, such as at a restaurant or Christmas party | |
Food items intended to be consumed undercooked (except chicken and raw clams), such as sushi, runny eggs, raw eggs and raw beef | |
Excludes: | |
Exposure classified as unpasteurized or water | |
Contaminated food whereby food safety practices are neglected | |
Food safety practices | Unsafe food safety practices including issues regarding food handling, food preparation, hand hygiene, cross-contamination, temperature (e.g. undercooking), and thawing meat |
Excludes: | |
Exposures related to work/occupation | |
Cross-contamination specifically stated from live animal exposure or person-to-person transmission | |
Hand washing by a caregiver not specifically stated to be food related | |
Unpasteurized | Consumption of unpasteurized, raw or untreated milk, juice, or cheese |
Occupational | Implied or directly stated work/occupational exposure |
Excludes: | |
Specifically stated raw water exposure; this was classified as water | |
Food consumed at work | |
Environmental | Exposure from the external physical environment, such as exposure to animal feces, animal remains, pet food, sewage backup, indirect animal contact (including eggs), and farm contact |
Includes: | |
Activities such as camping hiking, playing in the park, or visiting a pumpkin patch | |
Cross-contamination that does not involve food | |
Excludes: | |
Exposure classified as water, food, food safety practices, unpasteurized, occupational, animal or person-to-person | |
Animal | Potential animal contact |
Excludes: | |
Contact through work/occupational exposure | |
Farm/barn contact without specifically stated animal contact/exposure; this was classified as environmental | |
Person-to-person | Implied or directly stated person-to-person transmission |
Includes: | |
Cases born with listeriosis | |
Acquired through sexual transmission | |
Acquired through breastfeeding | |
Excludes: | |
Contact through work/occupational exposure | |
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 | MLSI that did not fit in above eight categories |
Includes: | |
Exposures stated as settings (or contact with) such as household, home, long-term care facility, hospital, day care, support care facility, and short-term stay shelter | |
Chronic/asymptomatic carriers |