Wash each sample (of parasite material) and put each one in a jar or watertight container with some purified water to stop it drying out.
Choose a lab that has a good record for testing for parasites.
Contact the lab and check all their requirements, costs.
Ask a doctor to write a referral to the lab, requesting comprehensive testing for parasites.
Send the samples and the doctor's referral to the lab.
People on this forum can offer some advice, but the ONLY way you will find out what you've got is by having samples tested in the lab, and then getting the appropriate medicine. From a doctor.