Abstract
The concentration of total neopterin in serum and cerebrospinal fluid (CSF) was measured in cases of febrile convulsion, aseptic meningitis and influenza encephalopathy. In febrile convulsion except for exanthem subitum, the concentrations of CSF neopterin (26± 11, Mean±SD, n=6) were all within normal range while those of serum neopterin (66± 20, n=8) were significantly higher (p < 0.05). In aseptic meningitis, on the other hand, the concentrations of CSF neopterin (194± 130, n=13) were significantly higher than those of serum (33±23, n=11, p < 0.05). In influenza encephalopathy, both concentrations of serum neopterin (329±478, n=13) and CSF neopterin(179±131, n=11) were much higher than the control range. Our results indicate that the primary immunoreacting site is the central nervous system (CNS) for aseptic meningitis, the periphery for febrile convulsion except for exanthem subitum and both the periphery and the CNS for influenza encephalopathy. Measurements of neopterin concentrations in CSF as well as in serum may thus constitute an immediate aid for early differentiation of CNS infection from peripheral infection as well as for early detection of viral encephalopathy caused by viruses such as the influenza virus or the human herpes virus 6.
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