An observational study in Schistosomiasis, sponsored by Meta Roestenberg. Completed at 3 sites in Netherlands. Open to participants aged 18 Years to 99 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2020-11-18.
Sponsored by Meta Roestenberg · Observational
Schistosomiasis is increasingly encountered among travellers returning from the tropics and is known for its focal endemicity, associated with the presence of the snail intermediate host in fresh water. Because schistosomiasis in travellers is often atypical or asymptomatic due to the low intensity of infection, many infections likely go undiagnosed and will develop into chronic schistosomiasis. Conventional treatment of schistosomiasis in travellers with praziquantel 40mg/kg daily dose is known for its modest success rate. Diagnosis of schistosomiasis relies on egg detection, which has a poor sensitivity in low burden infections, or serology, which is inadequate to monitor cure. The department of parasitology of the Leiden University Medical Center has developed a novel diagnostic test based on the up-converting phosphor technology (UCP) to detect circulating anodic antigen (CAA). This test can be performed on serum and urine to detect low intensity schistosomiasis infections and confirm cure after praziquantel treatment. This study will assess the performance of UCP-CAA in travellers with high-risk water contact.
79 studies on the registry are indexed under Schistosomiasis; 14 are open to participants now.
This study's enrollment of 106 is below the median of 532 across 25 observational studies indexed under Schistosomiasis.
Browse Schistosomiasis studies →Meta Roestenberg is the lead sponsor of 2 studies on the registry; none are open to participants now.
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Travellers with reported high-risk water contact \<12 weeks before inclusion.
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Exclusion Criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.
Read whether the line is about a condition or about medicines, and which medicines and doses it means.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Immunosuppression
A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.
Read whether the line is about a condition or about medicines, and which medicines and doses it means.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
travellers with recent (\<12 weeks) high risk water contact are included in the study and asked to provide samples for CAA testing
Other: Urine CAA detection
In addition to routine diagnostics, serum and urine samples are stored for retrospective UCP-CAA antigen determination.
The sensitivity and specificity of UCP-CAA
The diagnostic performance of UCP-CAA will be assessed by calculating the sensitivity and specificity of UCP-CAA measurement in travellers 12 weeks after reported high-risk water contact. Routine diagnostics performed by the individual centers, such as serology, will be the standard against which sensitivity (number of cases positive in both tests / number of cases positive in routine diagnostics) and specificity (number of cases negative in both tests / number of cases negative in routine diagnostics) is calculated.
Time frame: 12 weeks after last water contact
The percentage of travellers with persisting positive UCP-CAA six weeks after conventional praziquantel treatment
Time frame: six weeks after praziquantel treatment
Ran from Jan 2015 to primary completion in Sep 2019, 56 months.
How these figures are worked out, and which studies are left out of them.
This study is completed, as verified in Nov 2020. You cannot join it, but the record below documents what was studied.
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