The antinuclear antibody (ANA) test is the go-to screening test for lupus. If the result is negative, says Dr. Gilkeson, you can almost guarantee that a patient doesnât have lupus. On the other hand, a positive result is much less clear; 90% to 95% of people who have a positive ANA test donât have lupus.
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The colourful outer skin of some citrus fruits, known as zest, is used as a flavouring in cooking; the white inner portion of the peel, the pith, is usually avoided due to its bitterness. The zest of a citrus fruit, typically lemon or an orange, can also be soaked in water in a coffee filter, and drunk.he middle layer of the pericarp is the mesocarp, which in citrus fruits consists of the white, spongy albedo, or pith. The innermost layer of the pericarp is the endocarp. The segments are also called  liths , and the space inside each lith is a locule filled with juice vesicles, or pulp.