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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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Serum cholesterol testing in adults is recommended every 1 to 5 years. People with diabetes and a family history of high cholesterol should be tested even more frequently.
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Patients who have been on total parenteral nutrition for more than a few days may need to have foods gradually reintroduced to give the digestive tract time to start working again.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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People about to have surgery must tell their health care providers about all supplements they take.
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