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Volume 11, Number 3—March 2005

Research

Malaria Risk in Travelers

Helena Hervius Askling*†, Jenny Nilsson*†, Anders Tegnell*, Ragnhild Janzon*, and Karl Ekdahl*‡Comments to Author 
Author affiliations: *Swedish Institute for Infectious Disease Control, Stockholm, Sweden; †Karolinska University Hospital, Stockholm, Sweden; ‡Karolinska Institute, Stockholm, Sweden

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Table 2

Reported travel-associated cases of malaria in Sweden, 1997–2003

Source of infection 1997 1998 1999 2000 2001 2002 2003 Total
Plasmodium falciparum 10 56 55 60 58 65 44 348
P. malariae 0 0 1 5 4 4 1 15
P. ovale 2 11 4 8 7 10 5 47
P. vivax 12 34 33 19 40 21 19 178
Unspecified species 133 43 31 20 18 11 13 269
Total 157 144 124 112 127 111 82 857

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