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Neurology India, Vol. 59, No. 5, September-October, 2011, pp. 795 Correspondence Authors' reply AK Kayal, M Goswami, M Das, B Paul Department of Neurology, Gauhati Medical College, Guwahati, Assam, India Thank you for the interest in our article on the clinical spectrum of neurosyphilis. [1],[2] We have used the diagnostic criteria as suggested by Pope and Steiner. [3] Even in the article by Workoswki et al.,[4] it is mentioned that "The venereal disease research laboratory in cerebrospinal fluid (CSF VDRL), which is highly specific but insensitive, is the standard serologic test for CSF. When reactive in the absence of substantial contamination of CSF with blood, it is considered diagnostic of neurosyphilis". Therefore the laboratory diagnosis of neurosyphilis usually depends on various combinations of reactive serologic test results, CSF cell count or protein; and a reactive CSF VDRL with or without clinical manifestations. In our series blood VDRL and CSF VDRL was done in all the patients. In addition blood TPHA was also done in 14 of 16 patients and all these patients were positive. CSF fluorescent treponemal antibody - absorbtion, CSF TPHA though sensitive are not routinely available. References
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