Rather than treating them as superfluous or parasitic, America must begin to see them as the base on which we all depend.

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It came up with tests, to be used primarily in hospital emergency rooms, that determine within 15 minutes if a patient has had a heart attack, has congestive heart failure, bacterial or parasitic infection, or has used illicit drugs.

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Some of the rest regulates the genes, but most consists of stuff that is apparently useless or, worse, parasitic.

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Policymakers could amend existing law as it relates to the superior-lien status and the use of expedited foreclosure, or ban altogether what has become a parasitic cottage business.

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In the lake, however, there is the risk of bilharzia, an infection by a type of parasitic worm, so travellers who choose to swim or dive there often stock up on the treatment, Praziquantel tablets.

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