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Background <p>Schistosomiasis due to the species <i>Schistosoma intercalatum/guineensis</i>, 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 <i>S. intercalatum/guineensis</i> infection.</p> Methods <p>A retrospective study was performed. The aim was to showcase a clinical overview of this rarely described disease All cases diagnosed of schistosomiasis by <i>S. intercalatum/guineensis</i> 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 <i>S. intercalatum/guineensis</i> eggs. Demographic, clinical, and microbiological data were analyzed.</p> Results <p>Seventy-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&#xa0;mg/kg/day in different scheme dosage. Post-treatment microscopic examination of the stools was negative in all the cases performed.</p> Conclusions <p>Patients affected by <i>S. intercalatum/guineensis</i> 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.</p>

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Imported Schistosoma intercalatum/guineensis infection: a retrospective study from a referral Tropical Medicine Unit in Barcelona, Spain

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  • 发表日期：

    2026年3月24日

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  • Nicole Jeria-Visintini,
  • Cristina Bocanegra,
  • Fernando Salvador,
  • Begoña Treviño,
  • Francesc Zarzuela,
  • Núria Serre-Delcor,
  • Joan Martínez-Campreciós,
  • Mª Luisa Aznar,
  • Juan Espinosa-Pereiro,
  • Diana Pou,
  • Pau Bosch-Nicolau,
  • Inés Oliveira,
  • Lidia Goterris,
  • Elena Sulleiro,
  • Adrián Sánchez-Montalvá,
  • Israel Molina

摘要

Background

Schistosomiasis 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.

Methods

A 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.

Results

Seventy-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.

Conclusions

Patients 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.