Neonatal sepsis with meningitis, ventriculitis and brain abscess caused by Edwardsiella tarda.

A case of neonatal sepsis caused by Edwardsiella tarda, an uncommon pathogen typically associated with aquatic lifeforms, is described. The infant presented in septic shock with seizures and respiratory failure and was found to have meningitis, ventriculitis and a brain abscess requiring drainage. Only a small number of case reports of neonatal E. tarda infection, several with sepsis with poor auditory or neurodevelopmental outcomes or meningitis, have been described in the literature. This case report suggests that E. tarda, while uncommon, can be a cause of serious central nervous system disease in the neonatal population and that an aggressive approach to pursuing and treating complications may lead to improved neurodevelopmental outcomes.

Intrathecal or intraventricular antimicrobial therapy for post-neurosurgical Gram-negative bacillary meningitis or ventriculitis: a systematic review and meta-analysis.

PURPOSE: Extensively-drug-resistant Gram-negative bacteria (XDR GNB)-related post-neurosurgical infection is closely related to mortality, which represents a major challenge for neurosurgeons. There is an urgent need to review and evaluate methods to reduce mortality. METHODS: Both international and Chinese databases were searched independently from their inception to 15 June 2023. A meta-analysis was conducted using RevMan 5.4 to compare the efficacy and safety of intravenous (IV) treatment in combination with intrathecal or intraventricular (ITH/IVT) treatment with IV treatment alone for post-neurosurgical meningitis or ventriculitis due to GNB. Mortality, microbiological clearance and adverse events were considered as primary outcomes. RESULTS: In total, 18 eligible studies involving 602 patients were included in the meta-analysis. The IV + ITH/IVT group was associated with significantly lower mortality (especially in the XDR GNB subgroup) and acceptable safety. In terms of microbiological clearance, a significant decrease was shown in the XDR GNB subgroup. Significant benefits were shown in laboratory parameters and clinical symptoms after patients were treated with ITH/IVT. CONCLUSION: Additional ITH/IVT treatment may promote XDR GNB clearance and reduce mortality. In addition, ITH/IVT administration can improve clinical symptoms and cerebrospinal fluid indicators of patients with post-neurosurgical infections. Significantly, ITH/IVT treatment does not increase the incidence of adverse events at the recommended dose.

Cerebrospinal fluid drainage-related ventriculitis due to multidrug-resistant microorganisms.

INTRODUCTION: The aim of the study was to analyze the clinical and microbiological characteristics of adult patients with cerebrospinal fluid (CSF) drainage-related ventriculitis. METHODS: Retrospective study from January 2010 to June 2019 performed in the Complexo Hospitalario Universitario de Vigo (Spain). Cases of CSF drainage-related ventriculitis in patients ≥18-year-old were gathered. Clinical characteristics of patients, type of drainage devices, management and microbiological isolates were analyzed. RESULTS: Ninety-one episodes of CSF drainage-related ventriculitis were identified. The most frequent organisms isolated were Gram-positive cocci (65%), mainly Staphylococcus epidermidis (48%). Multidrug-resistant microorganisms were detected in 21 episodes (23%). In multivariate analysis, the independent factors related with multidrug-resistant ventriculitis were the length of hospital stay >14 days (HR 6.7; 95%CI 1.75-25.86, p=0.006) and previous antimicrobial therapy (HR 5.58; 95%CI 1.44-21.65, p=0.013). CONCLUSIONS: Our study shows a large number of drainage-related ventriculitis episodes caused by multidrug-resistant organisms and reinforce the importance of a judicious use of antibiotics.

Trends of Antimicrobial Susceptibility in Clinically Significant Coagulase-Negative Staphylococci Isolated from Cerebrospinal Fluid Cultures in Neurosurgical Adults: a Nine-Year Analysis.

Coagulase-negative staphylococci (CoNS) are the main pathogens in health care-associated ventriculitis and meningitis (HCAVM). This study aimed to assess antimicrobial susceptibility. Moreover, the treatment and clinical outcome were described. All neurosurgical adults admitted to one of the largest neurosurgical centers in China with clinically significant CoNS isolated from cerebrospinal fluid cultures in 2012 to 2020 were recruited. One episode was defined as one patient with one bacterial strain. Interpretive categories were applied according to the MICs. The clinical outcomes were dichotomized into poor (Glasgow Outcome Scale 1 to 3) and acceptable (Glasgow Outcome Scale 4 to 5). In total, 534 episodes involving 519 patients and 16 bacteria were analyzed. Over the 9 years, eight antimicrobial agents were used in antimicrobial susceptibility tests, including six in over 80% of CoNS. The range of resistance rates was 0.8% to 84.6%. The vancomycin resistance rate was the lowest, whereas the penicillin resistance rate was the highest. The linezolid (a vancomycin replacement) resistance rate was 3.1%. The rate of oxacillin resistance, representing methicillin-resistant staphylococci, was 70.2%. There were no significant trends of antimicrobial susceptibility over the 9 years for any agents analyzed. However, there were some apparent changes. Notably, vancomycin-resistant CoNS appeared in recent years, while linezolid-resistant CoNS appeared early and disappeared in recent years. Vancomycin (or norvancomycin), the most common treatment agent, was used in 528 (98.9%) episodes. Finally, 527 (98.7%) episodes had acceptable outcomes. It will be safe to use vancomycin to treat CoNS-related HCAVM in the immediate future, although continuous monitoring will be needed. IMPORTANCE Coagulase-negative staphylococci are the main pathogens in health care-associated ventriculitis and meningitis. There are three conclusions from the results of this study. First, according to antimicrobial susceptibility, the rates of resistance to primary antimicrobial agents are high and those to high-level agents, including vancomycin, are low. Second, the trends of resistance rates are acceptable, especially for high-level agents, although long-term and continuous monitoring is necessary. Finally, the clinical outcomes of neurosurgical adults with coagulase-negative staphylococci-related health care-associated ventriculitis and meningitis are acceptable after treatment with vancomycin. Therefore, according to the antimicrobial susceptibility and clinical practice, vancomycin will be safe to treat coagulase-negative staphylococci-related health care-associated ventriculitis and meningitis.

A case of Mycobacterium bovis Bacillus Calmette-Guérin (BCG) strain meningitis and ventriculitis following BCG vaccination.

The Bacillus Calmette-Guérin (BCG) vaccine is widely used worldwide. Intracranial manifestation as an adverse event of BCG is extremely rare. A previously healthy 16-month-old boy was referred to our hospital for eye contact difficulties and progressive gait disturbance lasting two months. He was inoculated with BCG at seven months of age. Brain magnetic resonance imaging (MRI) revealed hydrocephalus with widespread and disseminated enhancement lesions with thickening of the third ventricle floor, and brain tissue pathologically showed non-caseous granulomatous inflammation. Immunosuppressive therapies were initiated because of a provisional diagnosis of neurosarcoidosis. Three months later, a positive polymerase chain reaction (PCR) result for the Mycobacterium tuberculosis complex was obtained. Eventually, M. bovis (BCG Tokyo 172 strain) was identified in the cerebrospinal fluid (CSF) and shunt tube culture. The prolonged use of antituberculosis drugs and multiple shunt replacement surgeries were needed for recovery. There was no evidence of immunodeficiency. Unfortunately, he had severe neurological sequelae of bilateral blindness and neurodevelopmental delay. Our purpose in this report was to highlight the potential for intracranial manifestations of adverse reactions related to BCG vaccination. We propose that the CSF PCR assay of Mycobacterium tuberculosis (MTB) complex should be applied repeatedly in children suspected of intractable neurosarcoidosis, with a history of BCG vaccination.

Ureaplasma parvum ventriculitis related to surgery and ventricular peritoneal drainage.

Ureaplasma spp. usually causes genitourinary infections; few reports in the literature describe extragenital infections, usually in immunocompromised patients. We present a case of Ureaplasma parvum ventriculitis in an immunocompetent patient related to ventriculoperitoneal drainage and surgery. Ureaplasma parvum was detected with broad range 16S rRNA PCR and cultured on A8 agar.

Surveillance of external ventricular drainage-associated meningitis and ventriculitis in German intensive care units.

OBJECTIVE: In light of the infection risk associated with external ventricular drainage (EVD), we decided to establish the surveillance of EVD-associated meningitis/ventriculitis in German intensive care units (ICUs) in the framework of the German national nosocomial infection surveillance system (KISS). Here, we present the current reference data and subsequent risk-factor analysis for EVD-associated meningitis/ventriculitis rates. METHODS: The surveillance method corresponds with the surveillance methods for device-associated infections recommended by the National Healthcare Safety Network (NHSN). All ICUs participating for at least 1 month from 2008 to 2016 in the module ICU-KISS were included in the reference dataset and the multivariate analysis. RESULTS: Current reference data (2008-2016) are based on input from 157 ICUs. The mean EVD-associated meningitis/ventriculitis rate per 1,000 EVD days was 3.96, with little variation between neurosurgical, surgical, interdisciplinary (hospitals with >400 beds), and neurological ICUs. In total, 893 EVD-associated meningitis/ventriculitis cases and 225,351 EVD days were included in the risk-factor analysis. After multivariate analysis, 2 factors remained significant: (1) stay in an ICU labeled other than neurosurgical, surgical, interdisciplinary (>400 beds), and neurological as a protective factor and (2) EVD utilization rate above the 75th quantile as a risk factor for acquisition of EVD-associated meningitis/ventriculitis. CONCLUSIONS: EVD-associated meningitis and ventriculitis are frequent complications of care in intensive care patients at risk. A long hospital stay and/or the presence of the EVD puts the patient at high risk for pathogen acquisition with subsequent infection.

Multidrug-resistant Klebsiella oxytoca ventriculitis, successfully treated with intraventricular tigecycline: A case report.

A 38-year-old male presented to the hospital with headache, fever, and meningeal signs. He had undergone a surgical review of a ventriculoperitoneal shunt system one month earlier. A head computed tomography scan showed hydrocephalus. His medical history included a human immunodeficiency virus infection identified four years before and resolved cryptococcal meningitis, which had necessitated the implantation of the shunt system. Ventricular cerebrospinal fluid (CSF) was obtained, which showed inflammation and, in culture, grew a Gram-negative bacillus identified as multidrug-resistant Klebsiella oxytoca. The shunt was removed and a ventricular drain was installed. Treatment with meropenem and amikacin was established without a response; the CSF white blood cell count continued to increase, with cultures remaining positive. The patient's clinical condition deteriorated to stupor. With informed consent, intraventricular (ITV) treatment with tigecycline was initiated at a dose of 5 mg every 24 h and, three days later, the CSF cultures were negativized. Tigecycline levels in the CSF were quantified by liquid chromatography with ultraviolet detection and showed peak concentrations achieved at two hours after the dose of between 178 and 310 µg/mL. After 11 days of treatment with ITV tigecycline and eight negative CSF cultures, a new CSF shunt was installed. During follow-up review 10 months later, the patient reported he was working. The dose of tigecycline used in this study produced levels 15 to 20 times the minimum inhibitory concentration of the bacteria for up to six hours with adequate tolerance.

Impact of an external ventricular drain bundle and limited duration antibiotic prophylaxis on drain-related infections and antibiotic resistance.

BACKGROUND/OBJECTIVE: Systemic prophylactic antibiotics have been used to reduce the rate of neurosurgical drain-related infections (DRIs) but the optimal duration is unknown. The Neurocritical Care Society Consensus Statement for External Ventricular Drain (EVD) management recommends a single antibiotic dose preoperatively. Data regarding antibiotic management for other neurosurgical drains (e.g. subgaleal and subdural drains) are lacking. Previously at our institution antibiotics were continued for the duration of drain placement. In 2016 an EVD bundle was implemented to standardize nursing care, and antibiotic duration was changed to one preoperative dose for all neurosurgical drains. The objective of this study was to compare the incidence of DRI, non-DRI, and antibiotic resistance before and after the implementation of an EVD bundle and limited duration antibiotics. PATIENTS AND METHODS: This was a single center, quasi-experimental study that included patients status post EVD or craniotomy/craniectomy with subgaleal or subdural drain placement. The pre-intervention period was June 2014 through May 2015 and the post-intervention period was January 2017 through December 2017. RESULTS: Ninety-one patients were included in the pre-intervention group and 54 in the post-intervention group. The use of limited duration antibiotics (< 48 h) was 14.3 % in the pre-intervention group and 96.3 % in the post-intervention group (p < 0.001). Five DRIs were identified in the pre-intervention group and 3 in the post-intervention group (5.5 % vs 5.6 %, p = 1.00). Of patients who developed a non-DRI, 77.5 % had a resistant non-DRI in the pre-intervention group compared to 48 % in the post-intervention group (p = 0.01). The rates of resistant DRI (80 % vs 66.7 %, p = 1.00) and Clostridium difficile infection (1.1 % vs 3.7 %, p = 0.56) were similar between groups. CONCLUSIONS: Implementation of an EVD bundle and limited duration antibiotics reduced antibiotic exposure with no associated increase in risk of DRI. Rates of resistant non-DRI were significantly lower in the post-intervention group.

Developing a newborn rat model of ventriculitis without concomitant bacteremia by intraventricular injection of K1 (-) Escherichia coli.

BACKGROUND: Neonatal meningitis caused by Escherichia coli results in high mortality and neurological disabilities, and the concomitant systemic bacteremia confounds its mortality and brain injury. This study developed an experimental model of neonatal ventriculitis without concomitant systemic bacteremia by determining the bacterial inoculum of K1 capsule-negative E. coli by intraventricular injection in newborn rats. METHODS: We carried out intraventricular injections 1 × 102 (low dose), 5 × 102 (medium dose), or 1 × 103 (high dose) colony-forming units (CFU) of K1 (-) E. coli (EC5ME) in Sprague-Dawley rats at postnatal day (P) 11. Ampicillin was started at P12. Blood and cerebrospinal fluid (CSF) cultures were performed at 6 h, 1 day, and 6 days after inoculation. Brain magnetic resonance imaging (MRI) was performed at P12 and P17. Survival was monitored, and brain tissue was obtained for histological and biochemical analyses at P12 and P17. RESULTS: Survival was inoculum dose-dependent, with the lowest survival in the high-dose group (20%) compared with the medium- (67%) or low- (73%) dose groups. CSF bacterial counts in the low- and medium-dose groups were significantly lower than that in the high-dose group at 6 h, but not at 24 h after inoculation. No bacteria were isolated from the blood throughout the experiment or from the CSF at P17. Brain MRI showed an inoculum dose-dependent increase in the extent of brain injury and inflammatory responses. CONCLUSIONS: We developed a newborn rat model of bacterial ventriculitis without concomitant systemic bacteremia by intraventricular injection of EC5ME.

A nine-day-old girl with fever. / En ni dager gammel jente med feber.

Nowadays severe illness in neonates is fortunately rare in Norway. However, newborns present with non-specific symptoms, making diagnostics in this age group challenging, and neonatologists need to think broadly in order not to overlook serious illness. We present the case of a nine-day-old who was severely ill when she arrived at hospital. She was born in gestational week 37 after a normal pregnancy. The birth was complicated by shoulder dystocia, rupture of the umbilical cord and fracture of the clavicle. Thereafter she had a normal stay in the maternity ward for three days. At home she appeared healthy and gained weight until she returned to hospital after thirteen hours of poor feeding, irritability and fever. The symptoms turned out to be caused by bacterial meningitis. During the first week of hospitalisation she developed ventriculitis, brain abscesses and sinus vein thrombosis. It was later discovered that she had severely impaired hearing, and thereafter she developed hydrocephalus requiring surgical drainage. The mortality from neonatal bacterial meningitis has dropped from almost 50 % in the 1970s to less than 10 % today, but the morbidity has remained unchanged. It is crucial that clinicians are alert to this diagnosis, as delayed treatment can worsen the prognosis.

Successful Whole Genome Sequencing-guided Treatment of Mycoplasma hominis Ventriculitis in a Preterm Infant.

We report a case of Mycoplasma hominis ventriculitis in a preterm neonate that was successfully identified with 16S ribosomal RNA sequencing and whole genome sequencing after failure to detect the pathogen with conventional diagnostic methods. The infant required doxycycline with subsequent clearance of the infection and no evidence of drug toxicity.

First Case Report of Intraventricular Tigecycline in a Neonate With Extensively Drug-resistant Acinetobacter baumannii Ventriculitis.

Multidrug-resistant and extensively drug-resistant Acinetobacter baumannii infections have been increasing as a cause of healthcare-associated infections in the neonatal age group. In this report, we describe a 27-week, 1028 g, preterm neonate with extensively drug-resistant A. baumannii infection complicated by ventriculitis who did not respond to intravenous and intraventricular colistin but did respond after intraventricular tigecycline. This is the first case report describing the use of intraventricular tigecycline in a neonate with ventriculitis.

Iatrogenic Ventriculitis Due to Mycoplasma Hominis: A Case Report and Review of the Literature.

BACKGROUND Mycoplasma hominis, which rarely causes infection after neurosurgical procedures, is a small free-living organism, belonging to the genus Mycoplasma. M. hominis lacks a rigid cell wall and cannot be clearly visualized by routine light microscopy. Thus, it is challenging to diagnose infections caused by this pathogen. Here, we report a case of Mycoplasma hominis causing iatrogenic ventriculitis secondary to extraventricular drain. CASE REPORT A 25-year-old man who was a victim of a road traffic accident developed M. hominis ventriculitis secondary to extraventricular drain. Despite a delay in the diagnosis due to the difficulty of identifying M. hominis, the patient was successfully treated with intravenous ciprofloxacin 400 mg for 14 days. CONCLUSIONS The findings of this case report, coupled with a thorough review of the literature, demonstrate the pathogenic potential of M. hominis. Particularly in developing countries, in which laboratories may have limited access to advanced technologies, such rare infectious diseases remain major diagnostic challenges.

Ventriculitis associated with extraventricular drainage: etiology, diagnosis and treatment focused on neurocritic care units.

Ventriculitis after extraventricular drainage is a very important neurosurgical complication in neurocritical care units. It is necessary to make an early diagnosis, given that the morbidity and mortality secondary to it can be variable, and complicate the evolution of neurocritical patients. Despite this, ventriculostomy continues to be an important pillar in monitoring and treatment. Given the urgency of ventriculitis associated with multiresistant germs, new antimicrobial drugs have emerged as part of the treatment, as intraventricular routes have been proposed within the new investigations. However, the foregoing does not yet have sufficient bases to be able to support it. The present review was carried out with the aim of contributing to an early diagnosis and treatment of ventriculitis associated with extra ventricular drainage in neurocritical patients, and in this way to contribute to improve survival and prevent fatal outcomes in these patients.

La ventriculitis posterior a un drenaje extraventicular constituye una complicación neuroquirúrgica muy importante en las unidades de cuidados neurocríticos. Se hace necesario realizar un diagnóstico precoz, dado que la morbimortalidad secundaria a esta puede ser variable y complicar la evolución de los pacientes neurocríticos. A pesar de esto, la ventriculostomía continúa siendo un pilar importante en el monitoreo y el tratamiento. Ante la urgencia de ventriculitis asociadas a gérmenes multirresistentes han surgido nuevos fármacos antimicrobianos como parte del tratamiento, al igual que se han propuesto vías intraventriculares dentro de las nuevas investigaciones. Sin embargo, lo anterior aún no tiene bases suficientes para poder ­sustentarlo. La presente revisión se realizó con el objetivo de contribuir a un diagnóstico precoz y al tratamiento de la ventriculitis asociada a drenaje extraventricular en pacientes neurocríticos, y de esta forma poder mejorar la sobrevida y prevenir desenlaces fatales en estos pacientes.

Core curriculum illustration: ventriculitis as a complication of ventriculoperitoneal shunt-induced rectal perforation.

This is the 35th installment of a series that will highlight one case per publication issue from the bank of cases available online as part of the American Society of Emergency Radiology (ASER) educational resources. Our goal is to generate more interest in and use of our online materials. To view more cases online, please visit the ASER Core Curriculum and Recommendations for Study online at: http://www.aseronline.org/curriculum/toc.htm.