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https://www.readbyqxmd.com/read/27909995/solithromycin-a-novel-fluoroketolide-for-the-treatment-of-community-acquired-bacterial-pneumonia
#1
REVIEW
George G Zhanel, Erika Hartel, Heather Adam, Sheryl Zelenitsky, Michael A Zhanel, Alyssa Golden, Frank Schweizer, Bala Gorityala, Philippe R S Lagacé-Wiens, Andrew J Walkty, Alfred S Gin, Daryl J Hoban, Joseph P Lynch, James A Karlowsky
Solithromycin is a novel fluoroketolide developed in both oral and intravenous formulations to address increasing macrolide resistance in pathogens causing community-acquired bacterial pneumonia (CABP). When compared with its macrolide and ketolide predecessors, solithromycin has several structural modifications which increase its ribosomal binding and reduce its propensity to known macrolide resistance mechanisms. Solithromycin, like telithromycin, affects 50S ribosomal subunit formation and function, as well as causing frame-shift errors during translation...
December 1, 2016: Drugs
https://www.readbyqxmd.com/read/27907156/increased-nasopharyngeal-density-and-concurrent-carriage-of-streptococcus-pneumoniae-haemophilus-influenzae-and-moraxella-catarrhalis-are-associated-with-pneumonia-in-febrile-children
#2
Sopio Chochua, Valérie D'Acremont, Christiane Hanke, David Alfa, Joshua Shak, Mary Kilowoko, Esther Kyungu, Laurent Kaiser, Blaise Genton, Keith P Klugman, Jorge E Vidal
BACKGROUND: We assessed nasopharyngeal (NP) carriage of five pathogens in febrile children with and without acute respiratory infection (ARI) of the upper (URTI) or lower tract, attending health facilities in Tanzania. METHODS: NP swabs collected from children (N = 960) aged 2 months to 10 years, and with a temperature ≥38°C, were utilized to quantify bacterial density of S. pneumoniae (Sp), H. influenzae (Hi), M. catarrhalis (Mc), S. aureus (Sa), and N. meningitidis (Nm)...
2016: PloS One
https://www.readbyqxmd.com/read/27903558/cost-effectiveness-analysis-of-routine-pneumococcal-vaccination-in-the-uk-a-comparison-of-the-phid-cv-vaccine-and-the-pcv-13-vaccine-using-a-markov-model
#3
Emmanuelle Delgleize, Oscar Leeuwenkamp, Eleni Theodorou, Nicolas Van de Velde
OBJECTIVES: In 2010, the 13-valent pneumococcal conjugate vaccine (PCV-13) replaced the 7-valent vaccine (introduced in 2006) for vaccination against invasive pneumococcal diseases (IPDs), pneumonia and acute otitis media (AOM) in the UK. Using recent evidence on the impact of PCVs and epidemiological changes in the UK, we performed a cost-effectiveness analysis (CEA) to compare the pneumococcal non-typeable Haemophilus influenzae protein D conjugate vaccine (PHiD-CV) with PCV-13 in the ongoing national vaccination programme...
November 30, 2016: BMJ Open
https://www.readbyqxmd.com/read/27902758/oldenlandia-diffusa-extract-inhibits-biofilm-formation-by-haemophilus-influenzae-clinical-isolates
#4
Takeaki Wajima, Yui Anzai, Tetsuya Yamada, Hideaki Ikoshi, Norihisa Noguchi
Oldenlandia diffusa has been empirically used as a therapeutic adjunct for the treatment of respiratory infections. To establish the basic evidence of its clinical usefulness, antimicrobial and biofilm inhibitory activities of an O. diffusa extract were examined against clinical isolates of Haemophilus influenzae, a major causative pathogen of respiratory and sensory organ infections. No significant growth inhibitory activity was observed during incubation for more than 6 h after the extract addition into a culture of H...
2016: PloS One
https://www.readbyqxmd.com/read/27902411/non-typeable-haemophilus-influenzae-biofilm-production-and-severity-in-lower-respiratory-tract-infections-in-a-tertiary-hospital-in-mexico
#5
Michel Fernando Martínez-Reséndez, Juan Manuel González-Chávez, Elvira Garza-González, Lorena Nefertiti Castro-Fuentes, Jessica Lizzeth Gutiérrez-Ferman, Gabriela Echániz-Aviles, Adrián Camacho-Ortíz, María Noemí Carnalla-Barajas, Araceli Soto-Noguerón, Héctor Jesús Maldonado-Garza, Cristina Liliana Hernández-Balboa, Jorge M Llaca-Díaz, Samantha Flores-Treviño
Non-typeable Haemophilus influenzae (NTHi) is a common opportunistic bacterial pathogen that primarily infects the respiratory mucosa. This study was conducted to assess clinical and microbiological data related to disease severity in patients with lower respiratory tract infections caused by NTHi in a tertiary care hospital in Mexico. NTHi isolates were subjected to serotyping, antimicrobial susceptibility evaluation, and analyses of β-lactamase production, genetic relatedness, and biofilm formation. Clinical and demographic data were retrieved from patients' records...
October 17, 2016: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/27898728/relationships-between-mucosal-antibodies-non-typeable-haemophilus-influenzae-nthi-infection-and-airway-inflammation-in-copd
#6
Karl J Staples, Stephen Taylor, Steve Thomas, Stephanie Leung, Karen Cox, Thierry G Pascal, Kristoffer Ostridge, Lindsay Welch, Andrew C Tuck, Stuart C Clarke, Andrew Gorringe, Tom M A Wilkinson
Non-typeable Haemophilus influenzae (NTHi) is a key pathogen in COPD, being associated with airway inflammation and risk of exacerbation. Why some patients are susceptible to colonisation is not understood. We hypothesised that this susceptibility may be due to a deficiency in mucosal humoral immunity. The aim of our study (NCT01701869) was to quantify the amount and specificity of antibodies against NTHi in the lungs and the associated risk of infection and inflammation in health and COPD. Phlebotomy, sputum induction and bronchoscopy were performed on 24 mild-to-moderate COPD patients and 8 age and smoking-matched controls...
2016: PloS One
https://www.readbyqxmd.com/read/27895174/human-lung-fibroblasts-present-bacterial-antigens-to-autologous-lung-th-cells
#7
Andrew J Hutton, Marta E Polak, C Mirella Spalluto, Joshua C Wallington, Chris Pickard, Karl J Staples, Jane A Warner, Tom M A Wilkinson
Lung fibroblasts are key structural cells that reside in the submucosa where they are in contact with large numbers of CD4(+) Th cells. During severe viral infection and chronic inflammation, the submucosa is susceptible to bacterial invasion by lung microbiota such as nontypeable Haemophilus influenzae (NTHi). Given their proximity in tissue, we hypothesized that human lung fibroblasts play an important role in modulating Th cell responses to NTHi. We demonstrate that fibroblasts express the critical CD4(+) T cell Ag-presentation molecule HLA-DR within the human lung, and that this expression can be recapitulated in vitro in response to IFN-γ...
November 28, 2016: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/27895020/a-naturally-occurring-snp-in-plasmid-pb1000-produces-a-reversible-increase-in-antibiotic-resistance
#8
Alfonso Santos-Lopez, Cristina Bernabe-Balas, Manuel Ares-Arroyo, Rafael Ortega-Huedo, Andreas Hoefer, Alvaro San Millan, Bruno Gonzalez-Zorn
ColE1 plasmids are small mobilizable replicons that play an important role in the spread of antibiotic resistance in Pasteurellaceae. In this study we describe how a natural single nucleotide polymorphism (SNP) near the origin of replication of the ColE1-type plasmid pB1000 found in a Pasteurella multocida clinical isolate, generates two independent plasmid variants able to coexist in the same cell simultaneously. Using Haemophilus influenzae Rd strain as a model system, we combined antibiotic susceptibility tests, quantitative PCRs, competition assays and experimental evolution to characterize the consequences of the coexistence of the pB1000 plasmid variants...
November 28, 2016: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/27892867/the-balb-c-mouse-infection-model-for-improving-the-haemophilus-parasuis-serotyping-scheme
#9
Jiang Yu, Yuyu Zhang, Yijun Du, Jun Li, Baohua Huang, Wenbo Sun, Xiaoyan Cong, Jun Peng, Sufang Ren, Lihui Gou, Jianli Shi, Zhi Chen, Lei Chen, Jianda Li, Jie Yang, Jiaqiang Wu, Jinbao Wang
The use of BALB/c mouse as an alternative model to study Haemophilus parasuis (HPS) infections was evaluated, supplying the serotyping scheme by comparing the pathogenicity of different serovar HPS in pigs and mice challenge using statistical analysis. Results showed that the pathogenicity of different serovar HPS in mouse was consistent with in pigs, proving that this model is a viable alternative to pigs. It provides a convenient methodology for determining the virulence of HPS strains.
October 24, 2016: Research in Veterinary Science
https://www.readbyqxmd.com/read/27889711/immunogenicity-and-safety-of-a-liquid-hexavalent-vaccine-in-indian-infants
#10
Jugesh Chhatwal, Sanjay Lalwani, Emmanuel Vidor
OBJECTIVE: To evaluate the immunogenicity and safety of a fully liquid, hexavalent diphtheria tetanus acellular pertussis inactivated poliovirus hepatitis B Haemophilus influenzae type b (DTaP IPV HB PRPT) vaccine in Indian infants. DESIGN: Phase III, single-arm study. SETTING: Two tertiary care hospitals. PARTICIPANTS: 177 healthy, 6-week-old infants. INTERVENTION: All participants received HB and OPV vaccines at birth and DTaP-IPV-HB-PRP~T at 6, 10, 14 weeks of age...
November 5, 2016: Indian Pediatrics
https://www.readbyqxmd.com/read/27889249/analysis-of-streptococcus-pneumoniae-and-haemophilus-influenzae-isolated-from-middle-ear-fluid-before-and-after-the-introduction-of-government-subsidies-for-pneumococcal-and-h-%C3%A2-influenzae-type-b-vaccines-in-japan
#11
Tadashi Hoshino, Noriko Takeuchi, Chie Fukasawa, Shoko Hirose, Hideyuki Okui, Hiroko Sato, Mari Sato, Yukiko Arimoto, Atsuko Nakano, Naruhiko Ishiwada
This study aimed to identify trends in frequency, serotype, and antimicrobial susceptibility of Streptococcus pneumoniae and Haemophilus influenzae isolated from middle ear fluid specimens of children aged≤15 years (mean, 2 years), before and after the introduction of the 7-valent pneumococcal conjugate vaccine (PCV7) and the H. influenzae type b vaccine, at a pediatric facility in Japan. Sixty-six S. pneumoniae and 88 H. influenzae strains were isolated from 820 middle ear fluid samples. Serotyping and antimicrobial susceptibility testing were performed...
November 23, 2016: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
https://www.readbyqxmd.com/read/27886635/multiplex-pcr-reveals-that-viruses-are-more-frequent-than-bacteria-in-children-with-cystic-fibrosis
#12
Sílvia Miró-Cañís, Sílvia Capilla-Rubio, Laura Marzo-Checa, Dionisia Fontanals-Aymerich, Isabel Sanfeliu-Sala, Mateu Espasa-Soley, Oscar Asensio-de-la-Cruz
BACKGROUND: Cystic fibrosis is a degenerative disease characterized by progressive epithelial secretory gland dysfunction associated with repeated respiratory infections. Bacterial infections are very frequent in children with cystic fibrosis, but because rapid METHODS: for screening for the wide variety of potentially involved viruses were unavailable until recently, the frequency of viral presence is unknown. Multiplex PCR enables screening for many viruses involved in respiratory infections...
November 13, 2016: Journal of Clinical Virology: the Official Publication of the Pan American Society for Clinical Virology
https://www.readbyqxmd.com/read/27881546/draft-genome-sequences-of-two-haemophilus-quentini-isolates-recovered-from-two-different-patients-blood-cultures
#13
Alireza Eshaghi, Deidre Soares, Raymond Tsang, David Richardson, Julianne V Kus, Samir N Patel
Here, we present the draft genome sequences of two strains (K068 and C860) of the genospecies "Haemophilus quentini" The isolates were recovered from blood cultures of a newborn neonate and an elderly patient with septicemia in Ontario, Canada.
November 23, 2016: Genome Announcements
https://www.readbyqxmd.com/read/27879060/evidence-of-microbiota-dysbiosis-in-chronic-rhinosinusitis
#14
Michael Hoggard, Kristi Biswas, Melissa Zoing, Brett Wagner Mackenzie, Michael W Taylor, Richard G Douglas
BACKGROUND: Despite considerable research, the pathogenesis of chronic rhinosinusitis (CRS) remains poorly understood. Potential microbial roles in the etiology or progression of CRS have long been hypothesized, yet few specific associations have been identified. In this study we investigate associations between patterns in resident bacterial communities and clinical variants of CRS. METHODS: Bacterial communities were assessed in 94 patients with extensive bilateral CRS undergoing endoscopic sinus surgery (ESS) and 29 controls undergoing ESS for indications other than CRS...
November 23, 2016: International Forum of Allergy & Rhinology
https://www.readbyqxmd.com/read/27872823/serial-physical-examinations-a-simple-and-reliable-tool-for-managing-neonates-at-risk-for-early-onset-sepsis
#15
Alberto Berardi, Anna Maria Buffagni, Cecilia Rossi, Eleonora Vaccina, Chiara Cattelani, Lucia Gambini, Federica Baccilieri, Francesca Varioli, Fabrizio Ferrari
AIM: To investigate whether serial physical examinations (SPEs) are a safe tool for managing neonates at risk for early-onset sepsis (EOS). METHODS: This is a retrospective cohort study of neonates (≥ 34 wks' gestation) delivered in three high-volume level IIIbirthing centres in Emilia-Romagna (Italy) during a 4-mo period (from September 1 to December 31, 2015). Neonates at risk for EOS were managed according to the SPEs strategy, these were carried out in turn by bedside nursing staff and physicians...
November 8, 2016: World Journal of Clinical Pediatrics
https://www.readbyqxmd.com/read/27872201/identification-of-chemical-compounds-that-inhibit-protein-synthesis-in-pseudomonas-aeruginosa
#16
Stephanie O Palmer, Yanmei Hu, Megan Keniry, James M Bullard
Four inhibitory compounds were identified using a poly-uridylic acid (polyU) mRNA-directed aminoacylation/translation (A/T) protein synthesis system composed of phenylalanyl-tRNA synthetases (PheRS), ribosomes, and ribosomal factors from Pseudomonas aeruginosa in an in vitro screen of a synthetic compound library. The compounds were specific for inhibition of bacterial protein synthesis. In enzymatic assays, the compounds inhibited protein synthesis with IC50 values ranging from 20 to 60 μM. Minimum inhibitory concentrations (MICs) were determined in cultures for a panel of pathogenic organisms, including Enterococcus faecalis, Escherichia coli, Haemophilus influenzae, P...
November 21, 2016: Journal of Biomolecular Screening
https://www.readbyqxmd.com/read/27870809/rise-in-haemophilus-influenzae-with-reduced-quinolone-susceptibility-and-development-of-a-simple-screening-method
#17
Shoji Seyama, Takeaki Wajima, Yuki Yanagisawa, Hidemasa Nakaminami, Masanobu Ushio, Takeshi Fujii, Norihisa Noguchi
BACKGROUND: β-Lactamase-non-producing ampicillin-resistant (BLNAR) Haemophilus influenzae are prevalent in Japan. Resistance has increased as a consequence of the expanded use of antimicrobial agents, raising concerns about the rise of multidrug (macrolide and fluoroquinolone)-resistant H. influenzae. METHODS: In this study, we investigated susceptibility to fluoroquinolones in H. influenzae clinical isolates from 2013 to 2014, and identified the amino acid substitutions in quinolone resistance-determining regions of gyrA and parC...
November 18, 2016: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/27862309/study-of-greek-children-and-youths-with-cystic-fibrosis-identifies-immunisation-gaps-and-delays
#18
Helena C Maltezou, Stavros Doudounakis, Maria Lekaditi, Kalliopi Tanou, Panos Katerelos, Maria Theodoridou
AIM: Data about immunisation rates in cystic fibrosis (CF) patients are scarce. We estimated the rates and timeliness of immunisations in CF patients aged 0.55-22 years. METHODS: We studied 122 subjects at a hospital in Greece in 2014. A standard questionnaire was used to collect data and parents' opinions about immunisations. RESULTS: The complete immunisation rates were 92.6% for diphtheria-tetanus-acellular pertussis-inactivated poliomyelitis-Haemophilus influenzae (DTaP-IPV-Hib), 96...
November 10, 2016: Acta Paediatrica
https://www.readbyqxmd.com/read/27855146/global-routine-vaccination-coverage-2015
#19
Rebecca M Casey, Laure Dumolard, M Carolina Danovaro-Holliday, Marta Gacic-Dobo, Mamadou S Diallo, Lee M Hampton, Aaron S Wallace
In 1974, the World Health Organization (WHO) established the Expanded Program on Immunization* to provide protection against six vaccine-preventable diseases through routine infant immunization (1). Based on 2015 WHO and United Nations Children's Fund (UNICEF) estimates, global coverage with the third dose of diphtheria-tetanus-pertussis vaccine (DTP3), the first dose of measles-containing vaccine (MCV1) and the third dose of polio vaccine (Pol3) has remained stable (84%-86%) since 2010. From 2014 to 2015, estimated global coverage with the second MCV dose (MCV2) increased from 39% to 43% by the end of the second year of life and from 58% to 61% when older age groups were included...
November 18, 2016: MMWR. Morbidity and Mortality Weekly Report
https://www.readbyqxmd.com/read/27854516/evasion-of-neutrophil-extracellular-traps-by-respiratory-pathogens
#20
Daniel M L Storisteanu, Joanna M Pocock, Andrew S Cowburn, Jatinder K Juss, Angalee Nadesalingam, Victor Nizet, Edwin R Chilvers
The release of neutrophil extracellular traps (NETs) is a major immune mechanism intended to capture pathogens. These histone and protease-coated DNA structures are released by neutrophils in response to a variety of stimuli, including respiratory pathogens, and have been identified in the airways of patients with respiratory infection, cystic fibrosis, acute lung injury, primary graft dysfunction and COPD. NET production has been demonstrated in the lungs of mice infected with Staphylococcus aureus, Klebsiella pneumoniae and Aspergillus fumigatus...
November 17, 2016: American Journal of Respiratory Cell and Molecular Biology
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