Table 5.

Cases of acute and potentially life-threatening protozoan diseases (N = 2,827) among 82,825 ill western travelers to the tropics: data from the GeoSentinel surveillance network, 1996–2011

	Falciparum malaria	Knowlesi malaria	East African trypanosomiasis
Total number of cases	2,820	1	6
Age (median; range in years)	37 (0–80)	40 (NA)	45.5 (31–71)
Time to presentation (median; range in days)*	10 (1–341)	22 (NA)	6 (1–38)
Males (n, %)	1,890 (67)	1	3 (50)
Reason for travel (n, %)
Tourism	541 (19)	0	5 (83)
Business	381 (14)	1	1 (17)
VFR	1572 (56)	0	0 (0)
Other	323 (11)	0	0 (0)
Pre-travel consultation (n, %)	879 (33)	0	2 (33)
Exposure region (n, %)
Caribbean	43 (2)	0	0 (0)
Central America	5 (< 1)	0	0 (0)
Middle East	1 (< 1)	0	0 (0)
North Africa	23 (1)	0	0 (0)
Northeast Asia	1 (< 1)	0	0 (0)
Oceania	26 (1)	0	0 (0)
South America	17 (1)	0	0 (0)
South Central Asia	33 (1)	0	0 (0)
Southeast Asia	38 (1)	1	0 (0)
Sub-Saharan Africa†	2,633 (93)	0	6 (100)
Western Africa	1,527
Central Africa	349
Eastern Africa	286
Northern Africa	23
Southern Africa	11
Hospitalizations (n, %)	1,765 (63)	0	5 (83)
Complicated malaria‡ (n, %)	177 (6)	1	NA
Deaths (n, %)	10 (< 1)	0	0 (0)

NA = not applicable.

^*For cases seen post-travel only.

^†Sub-Saharan Africa categories based on United Nations region.

^‡WHO criteria.⁹