The range of central nervous system diseases caused by viruses is far broader than those caused by any other form of rnicrobiologic agent. They may present as acutely as a suddenly appearing meningitis or as insidiously as multiple sclerosis, now highly suspect of being related to?the measles virus. The pathogenesis of the slowly-appearing lesions is poorly understood, and while it may represent direct viral invasion, autoimmune or -immune mechanisms may be involved. In most acute or relatively acute viral infections meningitis, encephalitis, encephalornyelitis the histologic reactions are inflammatory in nature, providing no clue to the specific viral agent, since all evoke largely meningeal and perivascular infiltrates of lymphocytes and macrophages, accompanied sometimes by degenerative changes in neurones and glial reactions.?Dermatology Billing Services.?makes you spend more time with patients and increase the quality of the care.
Source: http://www.budchism.com/daily-health-news/know-on-perivasular-infiltrtes/
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