False Negative Result
Those who are immunologically compromised, especially those with HIV and low CD4 T cell counts, frequently show negative results from the PPD test. Steroid use, malnutrition and sarcoidosis can also lead to false-negative results, because the immune system needs to be functional to mount a response to the protein derivative injected under the skin.
Read more about this topic: Mantoux Test
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“I shall not want false witness to condemn me,
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The ancient proverb will be well effected:
“A staff is quickly found to beat a dog.””
—William Shakespeare (1564–1616)
“A negative judgment gives you more satisfaction than praise, provided it smacks of jealousy.”
—Jean Baudrillard (b. 1929)
“The poet sings how the blood flows in his veins. He performs his functions, and is so well that he needs such stimulus to sing only as plants put forth leaves and blossoms.... His song is a vital function like breathing, and an integral result like weight.”
—Henry David Thoreau (1817–1862)