Cefotaxime diffusion into cerebrospinal fluid of children with meningitis

Self Cite

In June 1993, the National Committee for Clinical Laboratory Standards (NCCLS) recommended stringent new interpretive guidelines for antibiotics indicated for Streptococcus pneumoniae meningitis. To assess the predictive values of the recommended breakpoints, retrospective data were collected from patients who had S. pneumoniae infections and were treated with cefotaxime monotherapy. Susceptibilities based on the NCCLS interpretative categories were compared with clinical and bacteriologic outcomes. In 76 evaluable patients, the most common infections were bacteremia-septicemia (n = 49), meningitis (n = 37), and lower respiratory tract infection (n = 14). Under the NCCLS breakpoints proposed in 1993, 55 isolates would have been classed as susceptible to cefotaxime (MIC, < or = 0.25 microgram/ml), 18 would have been classed as intermediate (MIC, 0.5 to 1.0 microgram/ml), and 2 would have been classed as resistant (MIC, > or = 2 micrograms/ml). Of 75 cefotaxime-treated patients for whom cefotaxime MICs were recorded, 73 were clinically cured or improved (37 of 37 with meningitis and 36 of 38 with other infections). One case of bacteremia and one case of bone-and-joint infection were scored as therapeutic failures because initial monotherapy had to be modified because of an adverse drug reaction. Excluding these patients, there were 18 patients infected with S. pneumoniae that would have been classed as not fully susceptible (i.e., MICs > or = 0.5 microgram/ml); all of these patients were cured or improved. The results of this analysis demonstrate that successful treatment with cefotaxime did not correlate well with the guidelines for the susceptibility of pneumococcal isolates to either penicillin or cefotaxime established by the 1993 NCCLS breakpoint recommendations. Because of this study and other similar findings, the NCCLS adopted more clinically relevant guidelines in 1994.

Section: Discussionsupporting

confidence: 61%

Relationship of MICs to efficacy of cefotaxime in treatment of Streptococcus pneumoniae infections

Jacobs

Kaplan

Schutze

et al. 1996

Self Cite

“…When AUC,O,CSF was related to AUCOs, the AUC ,OcsF/AUC-o_Os ratio of cefotaxime was 0.03 to 0.21 (median = 0.12; n = 5) compared with 0.006 to 0.018 (median = 0.007; n = 5) for ceftriaxone. antibiotics achieved concentrations in CSF several times higher than those in the present study (1,3,4,6,9,10,16,20,22,30). Elimination of both antibiotics in CSF was considerably slower than that in serum.…”

Section: Resultscontrasting

confidence: 46%

Passage of cefotaxime and ceftriaxone into cerebrospinal fluid of patients with uninflamed meninges

Nau

Prange

Muth

et al. 1993

126

Cefotaxime and ceftriaxone have proven to be effective in pyogenic infections of the central nervous system. Since in some bacterial central nervous system infections the blood-cerebrospinal fluid (CSF) barrier is either minimally impaired or recovers in the course of the illness, we studied the penetration of both antibiotics in the absence of inflamed meninges. Patients who had undergone external ventriculostomies for noninflammatory occlusive hydrocephalus received either cefotaxime (2 g/30 min) or ceftriaxone (2 g/30 min) to treat extracerebral infections. Serum and CSF were drawn repeatedly after the first dose. With ceftriaxone, they were also drawn after the last dose. The concentrations of cefotaxime, its metabolite desacetylcefotaxime, and ceftriaxone were determined by high-performance liquid chromatography with UV detection. Maximum concentrations of cefotaxime in CSF were reached 0.5 to 8 h (median = 3 h; n = 6) after the end of the infusion and ranged from 0.14 to 1.81 mg/liter (median = 0.44 mg/liter; n = 6). Maximum levels of ceftriaxone in CSF ranging from 0.18 to 1.04 mg/liter (median = 0.43 mg/liter; n = 5) were seen 1 to 16 h (median = 12 h; n = 5) after the infusion. The elimination half-life of cefotaxime in CSF was 5.0 to 26.9 h (median = 9.3 h; n = 5), and that of ceftriaxone was 15.7 to 18.4 h (median = 16.8 h; n = 3). It is concluded that after a single dose of 2 g, maximal concentrations of cefotaxime and ceftriaxone in CSF do not differ substantially. The long elimination half-lives guarantee uniform concentrations in CSF. These concentrations reliably inhibit highly susceptible bacteria but cannot be relied on to inhibit staphylococci and penicillin G-resistant Streptococcus pneumoniae.Because of its morbidity and lethality, bacterial meningitis remains a major medical concern throughout the world. The emergence of bacteria not susceptible to standard antibacterial agents in meningitis of children and immunocompromised adults has stimulated the search for alternative drugs. Broad-spectrum cephalosporins have a broad range of in vitro antibacterial activities, including that against most organisms responsible for purulent meningitis (6,7,19), and have been successfully applied as single agents for this indication in children and adults (3,9,29,34,37 Two grams of cefotaxime (Claforan; Hoechst AG, Frankfurt/M, Germany) or 2 g of ceftriaxone (Rocephin; Hoffmann-La Roche, Grenzach-Wyhlen, Germany) was infused intravenously within 30 min. Single-dose pharmacokinetics were determined after the first infusion for six patients receiving cefotaxime and six patients receiving ceftriaxone. To obtain a 24-h time course with cefotaxime, the second infusion was administered 24 h after the first dose. Thereafter, therapy was continued with 2 g three times a day or twice a day. For this reason, patients with pneumonia or fever greater than 38.5°C during the 24-h interval before the

“…As shown in Results, the median cefotaxime penetration into the CSF was 0.28, which was similar to the findings of a study in children with meningitis (8). However, a large interindividual variability of the penetration was demonstrated.…”

Section: Discussionsupporting

confidence: 90%

Penetration of Cefotaxime into Cerebrospinal Fluid in Neonates and Young Infants

Chen

Shi

Leroux

et al. 2018

Cefotaxime is the first-line treatment for meningitis in neonates and young infants. However, limited data on cefotaxime cerebrospinal fluid (CSF) concentrations in neonates and young infants were available. The aim of the present study was to evaluate the penetration of cefotaxime into CSF in neonates and young infants. Blood and CSF samples were collected from neonates and young infants treated with cefotaxime using an opportunistic pharmacokinetic sampling strategy, and concentrations were quantified by high-performance liquid chromatography-tandem mass spectrometry. The analysis was performed using NONMEM and R software. Thirty neonates and young infants (postmenstrual age range, 25.4 to 47.4 weeks) were included. A total of 67 plasma samples and 30 CSF samples were available for analysis. Cefotaxime plasma and CSF concentrations ranged from 2.30 to 175.42 mg/liter and from 0.39 to 25.38 mg/liter, respectively. The median ratio of the CSF concentration to the plasma concentration was 0.28 (range, 0.06 to 0.76). Monte Carlo simulation demonstrated that 88.4% and 63.9% of hypothetical neonates treated with 50 mg/kg of body weight three times a day (TID) would reach the pharmacodynamic target (the percentage of the dosing interval that the free antimicrobial drug concentration remains above the MIC, 70%) using the standard EUCAST MIC susceptibility breakpoints of 2 mg/liter and 4 mg/liter, respectively. The penetration of cefotaxime into the CSF of neonates and young infants was evaluated using an opportunistic sampling approach. A dosage regimen of 50 mg/kg TID could cover the most causative pathogens with MICs of <2 mg/liter. Individual dosage adaptation was required for more resistant bacterial strains, such as .