The use of a new PCR-based method for the diagnosis of malaria in the Spanish Malaria Reference Laboratory has promoted an increase in confirmed cases of malaria.
From August 1997 to July 1998, a total of 192 whole-blood samples and 71 serum samples from 168 patients were received from the hospitals of the Spanish National Health System.
Most of the patients came from west-central African countries (85%). This molecular method showed more sensitivity and specificity than microscopy, detecting 12.4% more positive samples than microscopy and 13% of mixed infections undetectable by Giemsa stain.
Plasmodium falciparum was the main species detected, with 68% of the total positive malaria cases, followed by Plasmodium malariae (29%), Plasmodium vivax (14%), and Plasmodium ovale (7%), including mixed infections in all cases.
This report consists of the first wide, centralized survey of malaria surveillance in Spain.
The reference laboratory conducted the analysis of all imported cases in order to detect trends in acquisition.
The use of a seminested multiplex PCR permitted confirmation of the origins of the infections and the Plasmodium species involved and confirmation of the effectiveness of drug treatments.
This PCR also allowed the detection of the presence in Spain of primaquine-tolerant P. vivax strains from west-central Africa, as well as the detection of a P. falciparum infection induced by transfusion.
Mots-clés Pascal : Plasmodium, Apicomplexa, Protozoa, Homme, Paludisme, Protozoose, Parasitose, Infection, Dépistage, Diagnostic, Sang total, Sérum, Réaction chaîne polymérase, Multiple, Spécificité espèce, Surveillance sanitaire, Programme sanitaire, Epidémiologie moléculaire, Europe Sud, Europe, Espagne
Mots-clés Pascal anglais : Plasmodium, Apicomplexa, Protozoa, Human, Malaria, Protozoal disease, Parasitosis, Infection, Medical screening, Diagnosis, Whole blood, Serum, Polymerase chain reaction, Multiple, Species specificity, Sanitary surveillance, Sanitary program, Molecular epidemiology, Southern Europe, Europe, Spain
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 99-0506282
Code Inist : 002B05A02. Création : 22/03/2000.