Local doctors, local hospital. Symptoms were high fever, paralysis, headache and swelling of limbs. Those who died were young children 8 and 9. It was diagnosed after 2 weeks as Bilharzia - but of course they could be wrong.
Usually it is fatal only if the eggs get to the human brain or spinal cord (& it is that which causes paralysis) - annual global fatalities are estimated at 20,000. So the diagnosis of these 2 children may not have been wrong, they just might have been 2 of those rare cases where the eggs had migrated to the brain/spinal cord. Normally the eggs go to the liver, intestine or bladder.
Have to say, years ago when I got it, I wasn't getting much joy with a diagnosis which I found believeable here (probably things have improved by now) so I went to UK where it was diagnosed although it took a while to remove the other possible diagnoses from the equation. I went to a tropical disease specialist in UK - most GPs there don't know too much about schisto because they don't encounter it too often. Once diagnosed you take medication for 3 days and you're good to go. However the antibody will show up in blood tests for years afterwards (12 years in my case). I'd urge anyone who is showing symptoms to seek medical advice & testing - the longer you leave it, the more risks you are taking.
I'll link to some informative websites:
SCI - Health Consequences of Schistomosiasis
Division of Parasitic Diseases - Schistosomiasis Fact Sheet
WHO | Epidemiological situation
I was never able to determine whether my schisto which presented symptoms here in DR was in fact contracted here or had been contracted years before during my many travels in Africa but had been asymptomatic until I moved here. I was certainly at risk in Africa, travelling and living a local lifestyle and not being a tourist.