Explain how environmental factors contribute to the pathogenesis of lymphoid neoplasms
What will be an ideal response?
Answer: The Epstein-Barr virus infects B lymphocytes, where it remains latent under the immune system's control. The EBV-infected cells can proliferate if the host becomes immunocompromised and/or the B lymphocytes acquire additional genetic abnormalities.
Helicobacter pylori leads to antigen-driven T-lymphocyte stimulation and subsequent B-lymphocyte activation. The B lymphocytes initially are polyclonal and depend entirely on T-cell stimulation. With time, the B-cell population can proliferate autonomously.
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What happens when a program infected with a virus is launched?
What will be an ideal response?
____ Watches for diseases that might be caused by acts of biologic or chemical terrorism.
a. Surveillance based on a specific case definition for a disease (e.g., listeriosis). b. Syndromic surveillance based on symptoms, signs, or other characteristics of a disease, rather than specific clinical or laboratory diagnostic criteria. c. Both. d. Neither.