[Imported malaria in adults. Clinical, epidemiological and analytical features].
BACKGROUND
Up to now, the epidemiological and clinical features of imported malaria in Spain have been described in small series from general hospitals. Almost all diagnosis had been made based on symptomatic patients. The aim of this study has been to determine the epidemiological, clinical and laboratorial characteristics of imported malaria in a Reference Unit for Tropical Diseases.


METHODS
We performed a cross-sectional, observational and retrospective study. The series consisted of patients diagnosed of malaria who had been attended at the Hospital Carlos III from January 1, 2002 to December 31, 2007.


RESULTS
We identified 484 episodes of malaria, of which 398 cases were included in the analysis. Almost 50% of the patients were natives of endemic areas, while the rest were native-travelers or travelers. Most cases (88-98% according to the group) had not taken malaria chemoprophylaxis correctly when indicated. At the time of diagnosis, 30.4% of patients were asymptomatic and 28.1% of asymptomatic patients had anemia, 19.8% thrombocytopenia, 14% leukopenia, 5% hypocholesterolemia, 5% renal failure and 4.1% hypoglycemia. Low parasitemia was present in 97.5% of asymptomatic individuals compared to 80.5% of the symptomatic patients (P<0.001).


CONCLUSIONS
Absence of chemoprophylaxis (or poor compliance) is the main reason for malaria in individuals traveling to endemic areas. Malaria must be ruled out in individuals coming from tropical countries with compatible symptoms, and it also should be suspected in certain groups of asymptomatic individuals with abnormal laboratorial parameters.
Unidad de Medicina Tropical, Servicio de Enfermedades Infecciosas, Hospital Carlos III, Madrid, España. germanro.76@gmail.com
G
G
Ramírez-Olivencia
M D
MD
Herrero
M
M
Subirats
J R
JR
de Juanes
J M
JM
Peña
S
S
Puente
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000962:Antimalarials / Q000627:therapeutic use; D003430:Cross-Sectional Studies; D054242:Emigrants and Immigrants; D005260:Female; D006801:Humans; D008288:Malaria / Q000175:diagnosis / Q000453:epidemiology / Q000517:prevention & control / Q000635:transmission; D008297:Male; D055118:Medication Adherence; D008875:Middle Aged; D010961:Plasmodium / Q000302:isolation & purification; D012189:Retrospective Studies; D013030:Spain / Q000453:epidemiology; D014195:Travel; D055815:Young Adult
D000962:Antimalarials