A 32-year-old man presents to the emergency room with a severe headache. Nuchal rigidity is found on physical
examination. Lumbar puncture demonstrates cerebrospinal fluid with markedly increased lymphocytes. Other cell
populations are not increased. Which of the following agents is the most likely cause of his symptoms?
<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />> >
> >
&nb sp; A. Escherichia coli
> >
&nb sp; B. Haemophilus influenzae
> >
&nb sp; C. Herpes virus
> >
&nb sp; D. Mycobacterium tuberculosis
> >
&nb sp; E. Treponema pallidum
Please explain.
I will post answer later. TY.
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| Geroo
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C. Herpes virus
lymphocytosis=viral,TB also can cause increased lymphocytes but TB doesn't cause acute meningitis
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| DrVirgo
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C. The clinically suspected diagnosis is meningitis, which is confirmed by the abnormal
cerebrospinal fluid. The markedly increased lymphocytes suggests acute lymphocytic meningitis, which is
distinguished from acute pyogenic meningitis (increased neutrophils as well as lymphocytes). Acute lymphocytic
meningitis is usually viral in origin. Among the many viruses that have been implicated, mumps, herpes,
Epstein-Barr, echovirus, and Coxsackie virus are the most common.
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| DrVirgo
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Escherichia coli(choice A) and Haemophilus influenzae(choice B) cause acute pyogenic meningitis.
Mycobacterium tuberculosis(choice D) and Treponema pallidum(choice E) cause chronic meningitis.
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| Natasa
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HSV-Most common viral cause of adult encephalitis.
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| 26malik
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C. as there is increased lymphocyte count and signs of meningitis are present. cant be bacterial as there are no neutrophils.
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| DrVirgo
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right.
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