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Table 1 Notified cases of Campylobacter infection in Sweden 1997–2002, per category of infection.

From: Regional risks and seasonality in travel-associated campylobacteriosis

Disease and category of infection 1997 1998 1999 2000 2001 2002 2003 1997–2003
Sweden 1 856 2 616 2 208 2 462 2 839 2 479 2 688 17 148
Travel associated 3 013 3 769 4 564 4 932 4 730 3 914 3 782 28 704
Immigrants/refugees 309 166 167 150 134 111 133 1 170
Unknown 1 703 846 730 870 875 633 544 6 201
Total 6 881 7 397 7 669 8 414 8 578 7 137 7 147 53 223