This is Dr Basu, experienced InternalMedicine Specialist.
I am here to address your concerns andprovide great service.
As I suggested earlier post ( different from othe expert), you and your family members likely have parasitic infection.
The heat pump should be inspected by the public health department.
Stool and urine tests both are required--stool for ova and parasites, urine for legionella antigens
Antibiotics like metronidazole, ciprofloxacin will likely be needed for the complete treatment for intestinal parasites.
Legionella disease is treated with azithromycin.
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