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  • Title: A comparison study of two therapeutic protocols for neurosyphilis.
    Author: Serragui S, Yahyaoui M, Hassar M, Chkili T, Bouhaddioui N, Soulaymani R.
    Journal: Therapie; 1999; 54(5):613-21. PubMed ID: 10667099.
    Abstract:
    In Morocco, neurosyphilis is a serious public health problem. In the neurology service at the specialist hospital in Rabat, two drug treatments were used. Treatment A consisted of infusion over a period of 4 h of 20 MUI of penicillin G per day for 3 weeks. Treatment B consisted of infusion over a period of 6 h of 30 MUI of penicillin G per day for 10 days. Each treatment was tested on a group of eight neurosyphilitic patients as first-line treatment. On the first day of treatment, both blood and CSF pharmacokinetics were sampled for each patient. Blood and CSF were taken within 24 h. Penicillin G concentrations were determined by a microbiological method. The results obtained showed that perfusions of either 20 MUI or 30 MUI of penicillin allowed the achievement of high serum concentrations. These increased progressively until reaching their maximum at T4 h for treatment A (from 92.33 to 106.38 micrograms/ml). For treatment B, maximal concentration is obtained at T6 h (from 108 to 141.52 micrograms/ml). Penicillin concentrations decreased immediately after stopping the perfusion. At CSF levels, penicillin G concentrations were identical to serum concentrations. However, one difference was observed: a one-hour difference between the serum and CSF peaks. The CSF peak was achieved at T5 h for treatment A (0.063 to 2.25 micrograms/ml) and at T7 h for treatment B (0.92 to 2.94 micrograms/ml). The concentrations obtained were largely superior to the CMI of Treponema pallidum for both treatment A and treatment B, at 47 times and 82 times higher respectively. The recovery time of the patients was 14 h for treatment A and 24 h for B treatment. These results have shown that therapeutic method B was more efficient than A. Moreover, the evolution of penicillin G's diffusion in the CSF during treatment, of cell counts of protein level, of the VDRL test and of the gamma-globulin rate was studied.
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