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  • Title: CXCL13 may improve diagnosis in early neuroborreliosis with atypical laboratory findings.
    Author: Borde JP, Meier S, Fingerle V, Klier C, Hübner J, Kern WV.
    Journal: BMC Infect Dis; 2012 Dec 10; 12():344. PubMed ID: 23228054.
    Abstract:
    BACKGROUND: Current guidelines regarding Lyme neuroborreliosis [LNB] require the presence of intrathecal Borrelia burgdorferi-specific antibody production for the definite diagnosis of LNB. However, about 20% of early stage infections present without an elevated antibody index. Moreover, intrathecal B. burgdorferi specific antibody synthesis may persist long after successful therapy of LNB. Recently published data indicate that CXCL13 seems to be a promising diagnostic tool for early stage LNB. In addition, CXCL13 might be suitable for treatment monitoring. CASE PRESENTATION: We report on a 39-year-old male patient from southern Germany, who has been suffering from subfebrile body temperatures and meningeal headache for six weeks. On the second day after hospital admission he developed peripheral palsy of the VII. cranial nerve. Cerebrospinal fluid (CSF) analysis showed granulocytic pleocytosis, elevated total protein and blood-CSF barrier dysfunction. Differential diagnostics for granulocytic pleocytosis were unremarkable. Only a second lumbar puncture, on day 6 after admission, revealed a lymphocytic pleocytosis. Serologic testing pointed to clear intrathecal Borrelia specific IgG antibody production. Interestingly, no anti-OspC antibodies were detectable. DNA of the rare Borrelia garinii OspA-type 7 could be amplified from the first CSF sample. The monitoring of CXCL13 in all CSF samples documented a fast decrease from 5000 pg/ml to 450 pg/ml after appropriate antibiotic treatment. CONCLUSION: CXCL13 is a novel biomarker with high sensitivity and specificity for acute LNB. Our data show, that CXCL13 might be helpful in unclear cases and support the presumption that it might be a valuable tool for treatment monitoring. Anti-OspC antibody negativity is a rare observation, given the need of OspC for infection of the human hosts. Most likely this is due to a lack of sensitivity of OspC immunoblots that are unable to detect rare OspC variants.
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