Host–pathogen interactions in bacterial meningitis

Abstract Bacterial meningitis is a devastating disease occurring worldwide with up to half of the survivors left with permanent neurological sequelae. Due to intrinsic properties of the meningeal pathogens and the host responses they induce, infection can cause relatively specific lesions and clinical syndromes that result from interference with the function of the affected nervous system tissue. Pathogenesis is based on complex host–pathogen interactions, some of which are specific for certain bacteria, whereas others are shared among different pathogens. In this review, we summarize the recent progress made in understanding the molecular and cellular events involved in these interactions. We focus on selected major pathogens, Streptococcus pneumonia, S. agalactiae (Group B Streptococcus), Neisseria meningitidis, and Escherichia coli K1, and also include a neglected zoonotic pathogen, Streptococcus suis. These neuroinvasive pathogens represent common themes of host–pathogen interactions, such as colonization and invasion of mucosal barriers, survival in the blood stream, entry into the central nervous system by translocation of the blood–brain and blood–cerebrospinal fluid barrier, and induction of meningeal inflammation, affecting pia mater, the arachnoid and subarachnoid spaces.
Source: Acta Neuropathologica - Category: Neurology Source Type: research

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Authors: Rombauts A, Abelenda-Alonso G, Cuervo G, Gudiol C, Carratalà J Abstract INTRODUCTION: Despite adequate antibiotic coverage, community-acquired pneumonia (CAP) remains a leading cause of hospitalization and mortality worldwide. It induces both a local pulmonary and a systemic inflammatory response, particularly significant in severe cases. The intensity of the dysregulated host response varies from patient to patient and has a negative impact on survival and other outcomes. AREAS COVERED: This comprehensive review summarizes the pathophysiological aspects of the inflammatory response in CAP, brie...
Source: Expert Review of Anti-Infective Therapy - Category: Infectious Diseases Tags: Expert Rev Anti Infect Ther Source Type: research
CONCLUSIONS: Xyloglucan/gelose plus ORS was effective and safe in treating acute diarrhea in children. PMID: 33028102 [PubMed - as supplied by publisher]
Source: Expert Review of Gastroenterology and Hepatology - Category: Gastroenterology Tags: Expert Rev Gastroenterol Hepatol Source Type: research
Conclusions: (1) Data at our center suggests at least a regional implementation gap in GBS screening and IAP. (2) The decline in the resistance rate ofE. coli for all antimicrobial substances might indicate that the reduction of prenatal antibiotics use is beneficial and that neonatal antibiotic stewardship programs should include pregnant women as well.What is Known:• GBS screening and intrapartum antibiotic prophylaxis led to a 32%-reduction in GBS disease in Germany with a 0.75 (92:122) ratio of early-onset disease to late-onset disease in 2009–2010.• Prenatal antibiotic use might increase the risk of E....
Source: European Journal of Pediatrics - Category: Pediatrics Source Type: research
Authors: Tamai H, Shingaki N, Ida Y, Shimizu R, Maeshima S, Okamura J, Kawashima A, Nakao T, Hara T, Matsutani H, Nishikawa I, Higashi K Abstract BACKGROUND: Although clinical use of sofosbuvir plus ribavirin has been approved for patients infected with genotype 2 hepatitis C virus, patients ≥ 75-years-old have not been included in previous clinical trials. AIM: To evaluate the real-world safety and efficacy of sofosbuvir plus ribavirin for elderly patients (≥ 75-years-old) compared to nonelderly patients, we conducted a post-marketing prospective cohort study. METHODS: We treated 265 patients with ge...
Source: World Journal of Hepatology - Category: Gastroenterology Tags: World J Hepatol Source Type: research
Authors: Yamaya T, Baba T, Hagiwara E, Ikeda S, Niwa T, Kitayama T, Murohashi K, Higa K, Sato Y, Ogura T Abstract Coronavirus disease 2019 (COVID-19) has been recognized as a worldwide pandemic. However, the clinical course of COVID-19 remains poorly characterized. Although some cases of pneumothorax have been reported, they all had pulmonary complications or were managed with mechanical ventilation. We herein report a case of pneumothorax that developed even though the patient had no pulmonary underlying diseases and had never been managed with mechanical ventilation. In the present case, a lung bulla was found on...
Source: Internal Medicine - Category: Internal Medicine Tags: Intern Med Source Type: research
Authors: Takahashi M, Horio Y, Takihara T, Enokida K, Miyaoka M, Hirabayashi K, Ohshinden K, Hattori S, Takahashi F, Takahashi G, Tanaka J, Takiguchi H, Niimi K, Ito Y, Hayama N, Oguma T, Asano K Abstract A 72-year-old man was treated with prednisolone and cyclosporine A for idiopathic pulmonary fibrosis. A nodule with a diameter of 19 mm was found in the right lung and diagnosed as lung squamous cell carcinoma. Anti-cancer treatments were not performed because of the presence of advanced interstitial pneumonia and chronic respiratory failure. Cyclosporine A was tapered to avoid suppression of anti-tumor immunity, ...
Source: Internal Medicine - Category: Internal Medicine Tags: Intern Med Source Type: research
This study investigated antibacterial-producing Streptomyces isolated from the gut of estuarine fish Chanos chanos, emphasizing screening for the producer of peptide-containing antibacterial compounds. Eighteen isolates were found during preliminary screening, in which four isolates showed the best antibacterial activities. Based on the morphological, physiological, and biochemical characterization, as well as 16S rRNA partial sequencing, all of the four isolates belonged to Streptomyces. Three isolates were suspected as novel isolate candidates based on homology presentations and phylogenetic tree analysis. Disk-diffusion...
Source: International Journal of Microbiology - Category: Microbiology Tags: Int J Microbiol Source Type: research
Publication date: Available online 8 October 2020Source: European Journal of RadiologyAuthor(s): Davide Colombi, Marcello Petrini, Gabriele Maffi, Gabriele D. Villani, Flavio C. Bodini, Nicola Morelli, Gianluca Milanese, Mario Silva, Nicola Sverzellati, Emanuele Michieletti
Source: European Journal of Radiology - Category: Radiology Source Type: research
Publication date: Available online 8 October 2020Source: Journal of Cardiology CasesAuthor(s): Masahiko Nakao, Junji Matsuda, Miho Iwai, Akira Endo, Taishi Yonetsu, Yasuhiro Otomo, Tetsuo Sasano
Source: Journal of Cardiology Cases - Category: Cardiology Source Type: research
Comparison of deaths from the coronavirus (COVID-19) with deaths from influenza (flu) and pneumonia. Includes deaths by date of death occurrence and breakdowns by sex and age.
Source: Current Awareness Service for Health (CASH) - Category: Consumer Health News Source Type: news
More News: Brain | Gastroenteritis | Group B Streptococcus | Men | Meningitis | Neurology | Pneumonia | Translocation | Zoonoses