ArticleBMC infectious diseases2026
Imported Schistosoma intercalatum/guineensis infection: a retrospective study from a referral Tropical Medicine Unit in Barcelona, Spain.
Article in BMC infectious diseases, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundSchistosomiasis due to the species Schistosoma intercalatum/guineensis, which had been traditionally classified as a single species, is one of the least studied. This work describes epidemiological, clinical and microbiological characteristics of patients with S. intercalatum/guineensis infection.
methodsA retrospective study was performed. The aim was to showcase a clinical overview of this rarely described disease All cases diagnosed of schistosomiasis by S. intercalatum/guineensis at the International Health Unit Vall d’Hebron-Drassanes (Infectious Diseases Department, Vall d’Hebron University Hospital, Barcelona, Spain) from January 2014 to April 2020 were included. The diagnosis was defined by the observation of S. intercalatum/guineensis eggs. Demographic, clinical, and microbiological data were analyzed.
resultsSeventy-four patients were included. Forty-seven (63.5%) of them were women, with a mean age of 24 (SD 12.8) years, and a mean time of residence in Spain of 9 (SD 20.7) months. All of them were migrants from Sub-Saharan Africa, 71 (95.9%) from Equatorial Guinea. Sixty-three (85.1%) patients had concomitant infections at the time of diagnosis and 50% of patients were symptomatic; abdominal pain and diarrhea being the more frequent. Anemia was detected in 25 (33.8%) patients, eosinophilia in 45 (60.8%), and hyperIgE in 48 (64.5%). Overall, 70 (94.6%) patients received treatment with praziquantel at 40 mg/kg/day in different scheme dosage. Post-treatment microscopic examination of the stools was negative in all the cases performed.
conclusionsPatients affected by S. intercalatum/guineensis infection come from a specific area of Central Africa. Co-infection with other parasites is very frequent, and symptoms are present in roughly 50% of patients. No cases of hepatic complications were detected but intestinal symptoms and anemia are frequent in these patients.
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