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https://www.readbyqxmd.com/read/28545143/haemophilus-parasuis-cytolethal-distending-toxin-induces-cell-cycle-arrest-and-p53-dependent-apoptosis
#1
Gang Li, Hui Niu, Yanhe Zhang, Yanling Li, Fang Xie, Paul R Langford, Siguo Liu, Chunlai Wang
Haemophilus parasuis is the causative agent of Glasser's disease in pigs. Cytolethal distending toxin (CDT) is an important virulence factor of H. parasuis. It is composed of three subunits: CdtA, CdtB and CdtC and all were successfully expressed in soluble form in Escherichia coli when the signal peptides were removed. Purified CdtB had DNase activity, i.e. caused DNA double strand damage, in vitro and in vivo prior to cell arrest and apoptosis. Flow cytometry analysis showed CdtB alone could induce cell cycle arrest and apoptosis in PK-15 porcine kidney and pulmonary alveolar macrophage (PAM) cells, which could be enhanced by CdtA or/and CdtC...
2017: PloS One
https://www.readbyqxmd.com/read/28544140/investigation-of-bronchiectasis-in-severe-uncontrolled-asthma
#2
Katerina Dimakou, Anna Gousiou, Michail Toumbis, Maria Kaponi, Serafeim Chrysikos, Loukas Thanos, Christina Triantafillidou
INTRODUCTION: The presence of bronchiectasis in patients with asthma varies in different reports, while a clear etiological relation has not been precisely established. OBJECTIVES: To investigate the presence of bronchiectasis in patients with severe uncontrolled asthma and examine whether they contribute to the severity of asthma. METHODS: Patients with severe asthma were prospectively recruited. HRCT of the chest was performed to identify and grade bronchiectasis using the "Smith" radiology scale...
May 24, 2017: Clinical Respiratory Journal
https://www.readbyqxmd.com/read/28542534/the-carriage-of-interleukin-1b-31-c-allele-plus-staphylococcus-aureus-and-haemophilus-influenzae-increases-the-risk-of-recurrent-tonsillitis-in-a-mexican-population
#3
Baltazar González-Andrade, Ramiro Santos-Lartigue, Samantha Flores-Treviño, Natalie Sonia Ramirez-Ochoa, Paola Bocanegra-Ibarias, Francisco J Huerta-Torres, Soraya Mendoza-Olazarán, Licet Villarreal-Treviño, Adrián Camacho-Ortiz, Hipólito Villarreal-Vázquez, Elvira Garza-González
The aim of the present study was to estimate the relative contribution of immunogenetic and microbiological factors in the development of recurrent tonsillitis in a Mexican population. Patients (n = 138) with recurrent tonsillitis and an indication of tonsillectomy (mean age: 6.05 years ± 3.00; median age: 5 years, female: 58; age range: 1-15 years) and 195 non-related controls older than 18 years and a medical history free of recurrent tonsillitis were included. To evaluate the microbial contribution, tonsil swab samples from both groups and extracted tonsil samples from cases were cultured...
2017: PloS One
https://www.readbyqxmd.com/read/28540145/a-rare-case-of-osteomyelitis-caused-by-haemophilus-parainfluenzae
#4
Fernando Cobo, Gemma Jiménez, Javier Rodríguez-Granger, Antonio Sampedro, Luis Aliaga-Martínez
Haemophilus parainfluenzae is a rare cause of bone and joint infections. We report a case of calcaneal osteomyelitis due to this microorganism with a review of all published. A 23-year-old woman presented with a 1-month history of pain and inflammation in the calcaneus area. Osteomyelitis was suspected at this location based on computed tomography images. Culture of six bone biopsies and surrounding tissue resulted in the isolation of H. parainfluenzae. Surgical drainage and debridement was performed, and antibiotic treatment was prescribed, resolving the infection...
2017: J Bone Jt Infect
https://www.readbyqxmd.com/read/28539852/abnormal-brain-connectivity-spectrum-disorders-following-thimerosal-administration-a-prospective-longitudinal-case-control-assessment-of-medical-records-in-the-vaccine-safety-datalink
#5
David A Geier, Janet K Kern, Kristin G Homme, Mark R Geier
BACKGROUND: Autism spectrum disorder (ASD), tic disorder (TD), and hyperkinetic syndrome of childhood (attention deficit disorder [ADD]/attention deficit hyperactivity disorder [ADHD]) are disorders recently defined as abnormal connectivity spectrum disorders (ACSDs) because they show a similar pattern of abnormal brain connectivity. This study examines whether these disorders are associated with exposure to thimerosal, a mercury (Hg)-based preservative. METHODS: A hypothesis testing case-control study evaluated the Vaccine Safety Datalink for the potential dose-dependent odds ratios (ORs) for diagnoses of ASD, TD, and ADD/ADHD compared to controls, following exposure to Hg from thimerosal-containing Haemophilus influenzae type b vaccines administrated within the first 15 months of life...
January 2017: Dose-response: a Publication of International Hormesis Society
https://www.readbyqxmd.com/read/28539074/nontypeable-haemophilus-influenzae-and-chronic-obstructive-pulmonary-disease-a-review-for-clinicians
#6
Krishna Bajee Sriram, Amanda J Cox, Robert L Clancy, Mary P E Slack, Allan W Cripps
Chronic Obstructive Pulmonary Disease (COPD) is a leading cause of morbidity and mortality worldwide. In the lower airways of COPD patients, bacterial infection is a common phenomenon and Haemophilus influenzae is the most commonly identified bacteria. Haemophilus influenzae is divided into typeable and nontypeable (NTHi) strains based on the presence or absence of a polysaccharide capsule. While NTHi is a common commensal in the human nasopharynx, it is associated with considerable inflammation when it is present in the lower airways of COPD patients, resulting in morbidity due to worsening symptoms and increased frequency of COPD exacerbations...
May 25, 2017: Critical Reviews in Microbiology
https://www.readbyqxmd.com/read/28536249/bronchial-inflammation-and-bacterial-load-in-stable-copd-is-associated-with-tlr4-overexpression
#7
Antonino Di Stefano, Fabio L M Ricciardolo, Gaetano Caramori, Ian M Adcock, Kian Fan Chung, Peter J Barnes, Paola Brun, Andrea Leonardi, Filippo Andò, Davide Vallese, Isabella Gnemmi, Luisella Righi, Francesco Cappello, Bruno Balbi
Toll-like receptors (TLRs) and nucleotide-binding oligomerisation domain (NOD)-like receptors (NLRs) are two major forms of innate immune sensors but their role in the immunopathology of stable chronic obstructive pulmonary disease (COPD) is incompletely studied. Our objective here was to investigate TLR and NLR signalling pathways in the bronchial mucosa in stable COPD.Using immunohistochemistry, the expression levels of TLR2, TLR4, TLR9, NOD1, NOD2, CD14, myeloid differentiation primary response gene 88 (MyD88), Toll-interleukin-1 receptor domain-containing adaptor protein (TIRAP), and the interleukin-1 receptor-associated kinases phospho-IRAK1 and IRAK4 were measured in the bronchial mucosa of subjects with stable COPD of different severity (n=34), control smokers (n=12) and nonsmokers (n=12)...
May 2017: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/28536030/lot-to-lot-consistency-safety-and-immunogenicity-of-3-lots-of-haemophilus-influenzae-type-b-conjugate-vaccine-results-from-a-phase-iii-randomized-multicenter-study-in-infants
#8
Nicola P Klein, Remon Abu-Elyazeed, Matthew Cornish, Michael L Leonardi, Leonard B Weiner, Peter E Silas, Stanley E Grogg, Meera Varman, Robert W Frenck, Brigitte Cheuvart, Yaela Baine, Jacqueline M Miller, Maarten Leyssen, Narcisa Mesaros, Sumita Roy-Ghanta
BACKGROUND: Vaccination against Haemophilus influenzae type b (Hib) is included in routine pediatric immunization schedule in the United States. Previous vaccine shortages have created the need for additional options for Hib vaccination. METHODS: This phase III, randomized, multi-centered study (NCT01000974) evaluated the safety and immunogenicity of a monovalent tetanus toxoid-conjugate Hib vaccine (Hib-TT) compared to a monovalent (Hib-TT control) and a combination Hib-TT vaccine...
May 20, 2017: Vaccine
https://www.readbyqxmd.com/read/28536027/live-attenuated-tetravalent-g1-g4-bovine-human-reassortant-rotavirus-vaccine-brv-tv-randomized-controlled-phase-iii-study-in-indian-infants
#9
Tarun Saluja, Sonali Palkar, Puneet Misra, Madhu Gupta, Potula Venugopal, Ashwani Kumar Sood, Ravi Mandyam Dhati, Avinash Shetty, Sangappa Malappa Dhaded, Sharad Agarkhedkar, Amlan Choudhury, Ramesh Kumar, Sundaram Balasubramanian, Sudhir Babji, Lopa Adhikary, Martin Dupuy, Sangeet Mohan Chadha, Forum Desai, Darshna Kukian, Badri Narayan Patnaik, Mandeep Singh Dhingra
BACKGROUND: Rotavirus remains the leading cause of diarrhoea among children <5years. We assessed immunogenic non-inferiority of a tetravalent bovine-human reassortant rotavirus vaccine (BRV-TV) over the licensed human-bovine pentavalent rotavirus vaccine RV5. METHODS: Phase III single-blind study (parents blinded) in healthy infants randomized (1:1) to receive three doses of BRV-TV or RV5 at 6-8, 10-12, and 14-16weeks of age. All concomitantly received a licensed diphtheria, tetanus, pertussis, hepatitis B, Haemophilus influenzae type b conjugate vaccine (DTwP-HepB-Hib) and oral polio vaccine (OPV)...
May 20, 2017: Vaccine
https://www.readbyqxmd.com/read/28532803/secondary-haemophilus-parasuis-infection-enhances-highly-pathogenic-porcine-reproductive-and-respiratory-syndrome-virus-hp-prrsv-infection-mediated-inflammatory-responses
#10
Jiangnan Li, Shengnan Wang, Changyao Li, Chunlai Wang, Yonggang Liu, Gang Wang, Xijun He, Liang Hu, Yuanyuan Liu, Mengmeng Cui, Caihong Bi, Zengyu Shao, Xiaojie Wang, Tao Xiong, Xuehui Cai, Li Huang, Changjiang Weng
Highly pathogenic porcine reproductive and respiratory syndrome virus (HP-PRRSV) infection often predisposes pigs to secondary bacterial infection, which induces robust inflammatory responses. However, whether the secondary bacterial infection synergizes HP-PRRSV infection and enhances inflammatory responses is not fully understood. Here, we characterized HP-PRRSV infection-mediated secondary bacterial infection and robust inflammatory responses. HP-PRRSV infection induced higher levels of cytokines (IL-1β, IL-18, IL-6 and TNF-α) in the sera in piglets and bacterial loads of 11 bacterial species in the lung were increased after HP-PRRSV infection, including Mycoplasma hyorhinis, Haemophilus parasuis and Escherichia coli...
May 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28528922/a-furry-friend-s-dirty-mouth-brain-abscess-due-to-aggregatibacter-haemophilus-aphrophilus
#11
David C Miller, Monica Fung, Alexander Carbo
No abstract text is available yet for this article.
May 18, 2017: American Journal of Medicine
https://www.readbyqxmd.com/read/28528009/identification-of-novel-haemophilus-parasuis-serovar-5-vaccine-candidates-using-an-immunoproteomic-approach
#12
Gang Li, Fang Xie, Jianjun Li, Jiao Liu, Dapeng Li, Yanhe Zhang, Paul R Langford, Yanwen Li, Siguo Liu, Chunlai Wang
Haemophilus parasuis is the aetiological agent of Glässer's disease, which is responsible for cases of fibrinous polyserositis, polyarthritis and meningitis. No vaccine is known that provides cross-protection against all serovars. The identification of novel immunoprotective antigens would undoubtedly contribute to the development of efficient subunit vaccines. In the present study, an immunoproteomic approach was used to analyze secreted proteins of H. parasuis and six proteins with high immunogenicity were identified...
May 17, 2017: Journal of Proteomics
https://www.readbyqxmd.com/read/28526665/the-sensor-study-protocol-for-a-mixed-methods-study-of-self-management-checks-to-predict-exacerbations-of-pseudomonas-aeruginosa-in-patients-with-long-term-respiratory-conditions
#13
Claire Roberts, Thomas L Jones, Samal Gunatilake, Will Storrar, Scott Elliott, Sharon Glaysher, Ben Green, Steven Rule, Carole Fogg, Ann Dewey, Kevin A Auton, Anoop J Chauhan
BACKGROUND: There are an estimated three million people in the United Kingdom with chronic obstructive pulmonary disease (COPD), and the incidence of bronchiectasis is estimated at around 0.1% but is more common in COPD and severe asthma. Both COPD and bronchiectasis are characterized by exacerbations in which bacteria play a central role. Pseudomonas aeruginosa is isolated from sputum samples from 4% to 15% of adults with COPD and is more likely to be isolated from patients with severe disease...
May 19, 2017: JMIR Research Protocols
https://www.readbyqxmd.com/read/28516200/respiratory-viral-infections-are-underdiagnosed-in-patients-with-suspected-sepsis
#14
L R Ljungström, G Jacobsson, B E B Claesson, R Andersson, H Enroth
The study aim was to investigate the prevalence and clinical relevance of viral findings by multiplex PCR from the nasopharynx of clinically septic patients during a winter season. During 11 weeks of the influenza epidemic period in January-March 2012, consecutive adult patients suspected to be septic (n = 432) were analyzed with cultures from blood and nasopharynx plus multiplex PCR for respiratory viruses on the nasopharyngeal specimen. The results were compared with those from microbiology analyses ordered as part of standard care...
May 17, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/28513815/epidemiology-of-paediatric-meningitis-in-central-c%C3%A3-te-d-ivoire-after-the-implementation-of-haemophilus-influenzae-type-b-vaccination
#15
Fidèle S Touré, Samson Kouame, Honoré Tia, Pacôme Monemo, Amadou Cissé, Bamourou Diané, Sören L Becker, Chantal Akoua-Koffi
Infectious meningitis accounts for enormous morbidity worldwide, but there is a paucity of data on its regional epidemiology in resource-constrained settings of sub-Saharan Africa. Here, we present a study on the aetiology of paediatric meningitis in central Côte d'Ivoire. Between June 2012 and December 2013, all cerebrospinal fluid (CSF) samples drawn at the University Teaching Hospital Bouaké were examined for the presence of bacterial and fungal pathogens. A causative agent was detected in 31 out of 833 CSF specimens (3...
May 17, 2017: New Microbiologica
https://www.readbyqxmd.com/read/28513418/flagellar-expression-in-clinical-isolates-of-non-typeable-haemophilus-influenzae
#16
Alejandro Carabarin-Lima, Patricia Lozano-Zarain, Miguel Castañeda-Lucio, Claudia Fabiola Martínez de la Peña, Julieta Martinez-Garcia, Norarizbeth Lara Flores, Elías Campos de la Cruz, Sirenia González-Posos, Rosa Del Carmen Rocha-Gracia
PURPOSE: Haemophilus influenzae is a commensal organism found in the upper respiratory tract of humans. When H. influenzae becomes a pathogen, these bacteria can move out of their commensal niche and cause multiple respiratory tract diseases such as otitis media, sinusitis, conjunctivitis and bronchitis in children, and chronic obstructive pulmonary disease in adults. However, H. influenzae is currently considered a non-flagellate bacterium. METHODOLOGY AND RESULTS: In this study, 90 clinical isolates of H...
May 2017: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28506850/neutrophil-extracellular-traps-are-associated-with-disease-severity-and-microbiota-diversity-in-chronic-obstructive-pulmonary-disease
#17
Alison J Dicker, Megan L Crichton, Eleanor G Pumphrey, Andrew J Cassidy, Guillermo Suarez-Cuartin, Oriol Sibila, Elizabeth Furrie, Christopher J Fong, Wasyla Ibrahim, Gill Brady, Gisli G Einarsson, J Stuart Elborn, Stuart Schembri, Sara E Marshall, Colin Na Palmer, James D Chalmers
BACKGROUND: Neutrophil extracellular traps (NETs) have been observed in the airway in COPD, but their clinical and pathophysiological implications have not been defined. OBJECTIVE: To determine if NETs are associated with disease severity in COPD, and how they are associated with microbiota composition and airway neutrophil function. METHODS: NET protein complexes (DNA-Elastase and Histone-Elastase complexes), cell free DNA and neutrophil biomarkers were quantified in soluble sputum and serum from COPD patients during periods of disease stability and during exacerbations, and compared to clinical measures of disease severity and sputum microbiome...
May 12, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28504487/haemophilus-influenzae-type-b-meningitis-is-there-a-re-emergence-24-years-of-experience-in-a-children-s-hospital
#18
Angela Gentile, Ana C Martínez, María Del V Juarez, María F Lución, Candela Burgo, María P Della Latta, Solana Rapapor, Viviana Romanin, Marisa Turco
INTRODUCTION: Haemophilus influenzae type B (Hib) used to be the main cause of bacterial meningitis in children younger than 5 years old. Following the introduction of the Hib vaccine in the immunization schedule (1998), its incidence reduced significantly but it has increased over the last years. The objectives of this study included describing the characteristics and analyzing the epidemic curve of Haemophilus influenzae type B (Hib) meningitis by comparing the pre- and postimmunization periods...
June 1, 2017: Archivos Argentinos de Pediatría
https://www.readbyqxmd.com/read/28500338/inflammatory-bacteriome-featuring-fusobacterium-nucleatum-and-pseudomonas-aeruginosa-identified-in-association-with-oral-squamous-cell-carcinoma
#19
Nezar Noor Al-Hebshi, Akram Thabet Nasher, Mohamed Yousef Maryoud, Husham E Homeida, Tsute Chen, Ali Mohamed Idris, Newell W Johnson
Studies on the possible association between bacteria and oral squamous cell carcinoma (OSCC) remain inconclusive, largely due to methodological variations/limitations. The objective of this study was to characterize the species composition as well as functional potential of the bacteriome associated with OSCC. DNA obtained from 20 fresh OSCC biopsies (cases) and 20 deep-epithelium swabs (matched control subjects) was sequenced for the V1-V3 region using Illumina's 2 × 300 bp chemistry. High quality, non-chimeric merged reads were classified to species level using a prioritized BLASTN-algorithm...
May 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28498097/the-asplenic-patient-post-insult-immunocompetence-infection-and-vaccination
#20
Brandon Dionne, Walter Dehority, Meghan Brett, Thomas R Howdieshell
BACKGROUND: Splenic injury can occur through multiple mechanisms and may result in various degrees of residual immunocompetence. Functionally or anatomically asplenic patients are at higher risk for infection, particularly with encapsulated bacteria. Vaccination is recommended to prevent infection with these organisms; however, the recommendations are routinely updated, and vaccine selection and timing are complex. METHODS: Review of the pertinent English-language literature, including the recommendations of the U...
May 12, 2017: Surgical Infections
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