Table 6 Farm characteristics of WISC mothers/infants in the farm group
Characteristic/activity (n = 111 unless otherwise stated) | |
|---|---|
Farm residence and work status | |
 Live/work on farm | 80% |
 Work only on farm | 16% |
 Unknown | 4% |
Animals kept on farm | |
 Cows | 77% |
 Cattle (bulls, steers) | 32% |
 Goats | 13% |
 Pigs | 19% |
 Poultry | 32% |
 Horses | 13% |
 Sheep | 6% |
 Other | 11% |
Number of farm animal species | |
 1 | 43% |
 2 | 25% |
 3 | 14% |
 4 | 8% |
 5 | 2% |
 6 | 1% |
 Unknown | 7% |
Crops grown and harvested | 88% |
Mother: regulara direct contact during pregnancy with | |
 Cattle (cows, calves, bulls, steers) | 66% |
 Goats | 7% |
 Pigs | 10% |
 Poultry | 25% |
 Hay | 76% |
 Straw | 63% |
 Feed grain | 66% |
 Silage | 58% |
 Manure | 30% |
 Unknown | 5% |
2 month infant (n = 101) | |
 Regular exposure to cattle | 58% |
 Regular exposure to goats | 5% |
 Regular exposure to pigs | 8% |
 Regular exposure to poultry | 11% |
 Regular exposure to forageb | 35% |
 Regular farm milk ingestion | 1% |
9 month infant (n = 89) | |
 Regular exposure to cattle | 50% |
 Regular exposure to goats | 9% |
 Regular exposure to pigs | 9% |
 Regular exposure to poultry | 14% |
 Regular exposure to forage | 44% |
 Regular farm milk ingestion | 2% |