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Bacterial meningitis

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https://www.readbyqxmd.com/read/29150269/potential-role-of-the-virchow-robin-space-in-the-pathogenesis-of-bacterial-meningitis
#1
Patrick Chan, Denis J Meerdink, James A Uchizono
Meningitis is an infectious disease commonly arising from a bacterial etiology. The rapid progression of morbidity and mortality due to bacterial meningitis requires critical and imminent time-dependent clinical intervention. Although it is unambiguously clear that bacteria must infiltrate the cerebrospinal fluid, the sequence of events in the pathogenesis of bacterial meningitis has not been fully elucidated. Most reviews of the pathogenesis of bacterial meningitis do not specify the anatomical location of bacteria following BBB traversal...
November 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/29146635/antibiotic-use-and-bacterial-complications-following-upper-respiratory-tract-infections-a-population-based-study
#2
Thomas Cars, Irene Eriksson, Anna Granath, Björn Wettermark, Jenny Hellman, Christer Norman, Anders Ternhag
OBJECTIVES: To investigate if use of antibiotics was associated with bacterial complications following upper respiratory tract infections (URTIs). DESIGN: Ecological time-trend analysis and a prospective cohort study. SETTING: Primary, outpatient specialist and inpatient care in Stockholm County, Sweden. All analyses were based on administrative healthcare data on consultations, diagnoses and dispensed antibiotics from January 2006 to January 2016...
November 15, 2017: BMJ Open
https://www.readbyqxmd.com/read/29128733/prevalence-of-curli-genes-among-cronobacter-species-and-their-roles-in-biofilm-formation-and-cell-cell-aggregation
#3
Lan Hu
Cronobacter species are food-borne opportunistic pathogens that cause sepsis, meningitis, and necrotizing enterocolitis in neonates. Bacterial pathogens such as pathogenic Escherichia coli and Salmonella species express extracellular curli fimbriae that are involved in rugosity, biofilm formation, and host cell adherence. csgBAC operon encodes the major curli structural subunit CsgA and the nucleator protein CsgB. csgDEFG operon encodes the regulatory protein CsgD and putative assembly factors. In this study, the curli operons were analyzed in the sequences of 13 Cronobacter strains and other enteric bacterial pathogens...
October 31, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/29123892/a-case-of-panspinal-epidural-abscess-that-presented-with-meningeal-irritation
#4
Naoki Okada, Takashi Nishiyama, Maki Kurihara, Yusuke Nishimura, Yoshiro Nishimura, Yukihiro Ando, Saori Otsubo, Katsumi Yamada, Yuji Maeda
Case: In rare cases, spinal epidural abscess involves the entire spine and can lead to neurological deficits and sepsis if treatment is delayed or suboptimal. A 65-year-old man was admitted with a diagnosis of bacterial meningitis. After admission, magnetic resonance imaging showed a spinal epidural abscess from the cervical to lumbar spine. Blood culture revealed Staphylococcus aureus. The patient was initially treated medically because he had no neurological deficits. Repeat blood culture remained positive and abscesses were found in the mediastinum and bilateral psoas muscles...
July 2017: Acute Medicine & Surgery
https://www.readbyqxmd.com/read/29121574/in-vitro-interaction-of-cefotaxime-with-calf-thymus-dna-insights-from-spectroscopic-calorimetric-and-molecular-modelling-studies
#5
Faizan Abul Qais, Iqbal Ahmad
Cefotaxime is third generation antibiotic with known therapeutic efficacy against bacterial infections including cerebral abscesses and bacterial meningitis. The β-lactam group of drugs are considered safest antibiotics. Many antibiotics directly interact with DNA and alter their expression profile. Thus, it is necessary to understand the binding mode and its relevance to drug activity and toxicity. There is considerably a remarkable focus on deciphering the binding mechanism of these therapeutic agents as DNA is one of the major target for wide range of drugs...
October 28, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/29112767/fast-and-reliable-diagnosis-of-xdr-acinetobacter-baumannii-meningitis-by-matrix-assisted-laser-desorption-ionization-time-of-flight-mass-spectrometry
#6
Grazia Brunetti, Giancarlo Ceccarelli, Alessandra Giordano, Anna Sara Navazio, Pietro Vittozzi, Mario Venditti, Giammarco Raponi
Bacterial meningitis is a medical emergency needing quick and timely diagnosis. Even though meningitis caused by Acinetobacter baumannii is relatively rare, it is associated with high mortality rates especially in neurosurgery patients and represents a serious therapeutic problem due to the limited penetration of effective antibiotics into the cerebrospinal fluid. Recently, matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF) has been effectively used as a rapid method for microbial identification...
November 7, 2017: New Microbiologica
https://www.readbyqxmd.com/read/29109133/ping-pong-gaze-and-ocular-nodding-in-bacterial-meningitis
#7
Yan Wang, Yong-Heng Huang, Shi-Lin Yang
No abstract text is available yet for this article.
November 7, 2017: Neurology
https://www.readbyqxmd.com/read/29104935/modeling-group-b-streptococcus-and-blood-brain-barrier-interaction-by-using-induced-pluripotent-stem-cell-derived-brain-endothelial-cells
#8
Brandon J Kim, Olivia B Bee, Maura A McDonagh, Matthew J Stebbins, Sean P Palecek, Kelly S Doran, Eric V Shusta
Bacterial meningitis is a serious infection of the central nervous system (CNS) that occurs after bacteria interact with and penetrate the blood-brain barrier (BBB). The BBB is comprised of highly specialized brain microvascular endothelial cells (BMECs) that function to separate the circulation from the CNS and act as a formidable barrier for toxins and pathogens. Certain bacteria, such as Streptococcus agalactiae (group B Streptococcus [GBS]), possess the ability to interact with and penetrate the BBB to cause meningitis...
November 2017: MSphere
https://www.readbyqxmd.com/read/29104430/pitfalls-in-the-diagnosis-and-management-of-invasive-pneumococcal-meningoencephalitis-what-we-can-learn-from-a-case
#9
Pascale S Grzonka, Raoul Sutter
Invasive pneumococcal meningitis is a life-threatening infectious disease affecting the central nervous system. It continues to be the most common type of community-acquired acute bacterial meningitides. Despite advances in neuro-critical care, the case fatality rate remains high. Rapid diagnosis and initiation of antibiotic therapy precludes mortality and long-term neurological sequelae in survivors. However, not all cases are easily recognised, and unanticipated complications may impede optimal course and outcome...
2017: Clinical Medicine Insights. Case Reports
https://www.readbyqxmd.com/read/29103336/procalcitonin-performance-in-detecting-serious-and-invasive-bacterial-infections-in-children-with-fever-without-apparent-source-a-systematic-review-and-meta-analysis
#10
Giulia Trippella, Luisa Galli, Maurizio De Martino, Catiuscia Lisi, Elena Chiappini
The management of children with fever without apparent sources (FWAS) is difficult. This study aimed to evaluate the diagnostic accuracy of procalcitonin (PCT) in detecting serious or invasive bacterial infection (SBI or IBI) in children with FWAS. Areas covered: A systematic review of literature from 2007 to 2017 was performed on Medline. Twelve studies were included, involving 7,260 children with FWAS and analyzing the diagnostic performance of PCT. Four meta-analyses were performed to calculate pooled sensitivity, specificity, diagnostic odds ratio, and summary receiver operating characteristic curve for PCT in detecting SBI and IBI, at two different thresholds...
November 2017: Expert Review of Anti-infective Therapy
https://www.readbyqxmd.com/read/29099305/peripheral-blood-vessels-are-a-niche-for-blood-borne-meningococci
#11
Elena Capel, Jean-Philippe Barnier, Aldert L Zomer, Christine Bole-Feysot, Thomas Nussbaumer, Anne Jamet, Hervé Lécuyer, Daniel Euphrasie, Zoé Virion, Eric Frapy, Philippe Pélissier, Olivier Join-Lambert, Thomas Rattei, Sandrine Bourdoulous, Xavier Nassif, Mathieu Coureuil
Neisseria meningitidis is the causative agent of cerebrospinal meningitis and that of a rapidly progressing fatal septic shock known as purpura fulminans. Meningococcemia is characterized by bacterial adhesion to human endothelial cells of the microvessels. Host specificity has hampered studies on the role of blood vessels colonization in N. meningitidis associated pathogenesis. In this work, using a humanized model of SCID mice allowing the study of bacterial adhesion to human cells in an in vivo context we demonstrate that meningococcal colonization of human blood vessels is a prerequisite to the establishment of sepsis and lethality...
November 3, 2017: Virulence
https://www.readbyqxmd.com/read/29097032/-the-infections-of-the-ear
#12
Catherine Nowak, Lei Tanaka, Serge Bobin, Jérôme Nevoux
In front of external otitis in spite of a well-conducted treatment, especially in immunodeficient patient, it is always necessary to look for an osteomyelitis of the skull base that requires an urgent parenteral antibiotic treatment of several weeks. Acute otitis media (AOM) is the most common bacterial infection of the child. In children under 2 years with purulent AOM, antibiotic therapy with amoxicilline is systematic for a period of 8-10 days. After 2 years of age and with mild symptoms of AOM, symptomatic treatment may be justified as first-line treatment...
October 30, 2017: La Presse Médicale
https://www.readbyqxmd.com/read/29096648/inhibition-of-damp-signaling-as-an-effective-adjunctive-treatment-strategy-in-pneumococcal-meningitis
#13
Ilias Masouris, Matthias Klein, Susanne Dyckhoff, Barbara Angele, H W Pfister, Uwe Koedel
BACKGROUND: Pneumococcal meningitis remains a potentially lethal and debilitating disease, mainly due to brain damage from sustained inflammation. The release of danger-associated molecular patterns (DAMPs), like myeloid-related protein 14 (MRP14) and high mobility group box 1 protein (HMGB1), plays a major role in persistence of inflammation. In this study, we evaluated if paquinimod, an MRP14-inhibitor, and an anti-HMGB1 antibody can improve clinical outcome as adjunctive therapeutics in pneumococcal meningitis...
November 2, 2017: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/29095907/bacterial-meningitis-epidemiology-and-return-of-neisseria-meningitidis-serogroup-a-cases-in-burkina-faso-in-the-five-years-following-menafrivac-mass-vaccination-campaign
#14
Alpha Oumar Diallo, Heidi M Soeters, Issaka Yameogo, Guetawendé Sawadogo, Flavien Aké, Clément Lingani, Xin Wang, Andre Bita, Amadou Fall, Lassana Sangaré, Rasmata Ouédraogo-Traoré, Isaïe Medah, Brice Bicaba, Ryan T Novak
BACKGROUND: Historically, Neisseria meningitidis serogroup A (NmA) caused large meningitis epidemics in sub-Saharan Africa. In 2010, Burkina Faso became the first country to implement a national meningococcal serogroup A conjugate vaccine (MACV) campaign. We analyzed nationwide meningitis surveillance data from Burkina Faso for the 5 years following MACV introduction. METHODS: We examined Burkina Faso's aggregate reporting and national laboratory-confirmed case-based meningitis surveillance data from 2011-2015...
2017: PloS One
https://www.readbyqxmd.com/read/29095719/novel-and-preclinical-treatment-strategies-in-pneumococcal-meningitis
#15
Jan P Bewersdorf, Denis Grandgirard, Uwe Koedel, Stephen L Leib
PURPOSE OF REVIEW: Pneumococcal meningitis is the most frequent form of bacterial meningitis in Europe and the United States. Although early antimicrobial and adjuvant therapy with dexamethasone have helped to improve disease outcome in adults, mortality and morbidity rates remain unsatisfactorily high, emphasizing the need for additional treatment options. Promising targets for adjuvant therapy have been identified recently and will be the focus of this review. RECENT FINDINGS: Brain disease in pneumococcal meningitis is caused by direct bacterial toxicity and excessive meningeal inflammation...
November 1, 2017: Current Opinion in Infectious Diseases
https://www.readbyqxmd.com/read/29093665/pi3k-and-inhibitor-of-apoptosis-proteins-modulate-gentamicin-induced-hair-cell-death-in-the-zebrafish-lateral-line
#16
Heather Wiedenhoft, Lauren Hayashi, Allison B Coffin
Inner ear hair cell death leads to sensorineural hearing loss and can be a direct consequence of aminoglycoside antibiotic treatment. Aminoglycosides such as gentamicin are effective therapy for serious Gram-negative bacterial infections such as some forms of meningitis, pneumonia, and sepsis. Aminoglycosides enter hair cells through mechanotransduction channels at the apical end of hair bundles and initiate intrinsic cell death cascades, but the precise cell signaling that leads to hair cell death is incompletely understood...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/29089928/antimicrobial-and-antibiofilm-effects-of-human-amniotic-chorionic-membrane-extract-on-streptococcus-pneumoniae
#17
Mukesh K Yadav, Yoon Y Go, Shin Hye Kim, Sung-Won Chae, Jae-Jun Song
Background:Streptococcus pneumoniae colonize the human nasopharynx in the form of biofilms. The biofilms act as bacterial reservoirs and planktonic bacteria from these biofilms can migrate to other sterile anatomical sites to cause pneumonia, otitis media (OM), bacteremia and meningitis. Human amniotic membrane contains numerous growth factors and antimicrobial activity; however, these have not been studied in detail. In this study, we prepared amniotic membrane extract and chorionic membrane extract (AME/CME) and evaluated their antibacterial and antibiofilm activities against S...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29077720/goal-directed-therapy-for-suspected-acute-bacterial-meningitis-in-adults-and-adolescents-in-sub-saharan-africa
#18
Emma C Wall, Mavuto Mukaka, Brigitte Denis, Veronica S Mlozowa, Malango Msukwa, Khumbo Kasambala, Mulinda Nyrienda, Theresa J Allain, Brian Faragher, Robert S Heyderman, David G Lalloo
BACKGROUND: Mortality from acute bacterial meningitis (ABM) in sub-Saharan African adults and adolescents exceeds 50%. We tested if Goal Directed Therapy (GDT) was feasible for adults and adolescents with clinically suspected ABM in Malawi. MATERIALS AND METHODS: Sequential patient cohorts of adults and adolescents with clinically suspected ABM were recruited in the emergency department of a teaching hospital in Malawi using a before/after design. Routine care was monitored in year one (P1)...
2017: PloS One
https://www.readbyqxmd.com/read/29073137/integration-of-enteric-fever-surveillance-into-the-who-coordinated-invasive-bacterial-vaccine-preventable-diseases-ib-vpd-platform-a-low-cost-approach-to-track-an-increasingly-important-disease
#19
Senjuti Saha, Maksuda Islam, Mohammad J Uddin, Shampa Saha, Rajib C Das, Abdullah H Baqui, Mathuram Santosham, Robert E Black, Stephen P Luby, Samir K Saha
BACKGROUND: Lack of surveillance systems and accurate data impede evidence-based decisions on treatment and prevention of enteric fever, caused by Salmonella Typhi/Paratyphi. The WHO coordinates a global Invasive Bacterial-Vaccine Preventable Diseases (IB-VPD) surveillance network but does not monitor enteric fever. We evaluated the feasibility and sustainability of integrating enteric fever surveillance into the ongoing IB-VPD platform. METHODOLOGIES: The IB-VPD surveillance system uses WHO definitions to enroll 2-59 month children hospitalized with possible pneumonia, sepsis or meningitis...
October 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29066548/genome-wide-discovery-of-genes-required-for-capsule-production-by-uropathogenic-escherichia-coli
#20
Kelvin G K Goh, Minh-Duy Phan, Brian M Forde, Teik Min Chong, Wai-Fong Yin, Kok-Gan Chan, Glen C Ulett, Matthew J Sweet, Scott A Beatson, Mark A Schembri
Uropathogenic Escherichia coli (UPEC) is a major cause of urinary tract and bloodstream infections and possesses an array of virulence factors for colonization, survival, and persistence. One such factor is the polysaccharide K capsule. Among the different K capsule types, the K1 serotype is strongly associated with UPEC infection. In this study, we completely sequenced the K1 UPEC urosepsis strain PA45B and employed a novel combination of a lytic K1 capsule-specific phage, saturated Tn5 transposon mutagenesis, and high-throughput transposon-directed insertion site sequencing (TraDIS) to identify the complement of genes required for capsule production...
October 24, 2017: MBio
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