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Group a streptococcus

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https://www.readbyqxmd.com/read/29457285/vaginal-isolation-of-beta-haemolytic-streptococcus-from-bitches-with-and-without-neonatal-deaths-in-the-litters
#1
A E Guerrero, M C Stornelli, S B Jurado, G Giacoboni, G H Sguazza, R L de la Sota, M A Stornelli
The aim of the study was to identify beta-haemolytic streptococci in the vagina of bitches who had delivered healthy litters and bitches who had delivered litters in which neonatal deaths occurred. Fifty-one bitches divided into two groups were used. Group 1 (G1) included 28 bitches that had delivered healthy litters and group 2 (G2) included 23 bitches that had delivered puppies who died in the neonatal period. Two vaginal samples were taken, one in proestrus and the other at the end of gestation (EG). Beta-haemolytic Streptococcus (BS) was isolated from 16 bitches (57%) in G1 and from 21 bitches (91%) in G2...
February 18, 2018: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/29454653/diagnostic-yield-of-real-time-polymerase-chain-reaction-in-the-diagnosis-of-intrapartum-maternal-rectovaginal-colonization-by-group-b-streptococcus-a-systematic-review-with-meta-analysis
#2
Otto Henrique May Feuerschuette, Sheila Koettker Silveira, Ana Carolina Labor Cancelier, Rosemeri Maurici da Silva, Daisson José Trevisol, Jefferson Ricardo Pereira
Group B Streptococcus is the leading etiologic factor of neonatal sepsis. Intrapartum real-time polymerase chain reaction (RT-PCR) may allow faster and more accurate detection of maternal colonization. The aim of this study was to determine the sensitivity and specificity of RT-PCR when compared to the reference standard culture in selective broth media collected from rectovaginal tract from laboring women. We selected 15 studies that included 6368 women. Papers selection, data extraction, and quality assessment were carried out by two independent researchers...
February 2, 2018: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/29454509/group-c-strep-mediastinitis-a-case-report
#3
Joseph G Kotora, Eric J Schmieler, Christian S McEvoy, Stephen L Noble
This case is significant to the practice of emergency medicine because it represents the development of an uncommon and potentially fatal mediastinal infection from a commonly encountered and appropriately treated community respiratory pathogen. Most published reports on mediastinitis are those that are status-post cardiothoracic surgery. In our report, we discuss a case of a healthy, young individual who developed this morbid entity from extension of a simple respiratory infection where Group C Streptococcus has been isolated as the causative organism, which to our knowledge has not been previously reported...
February 3, 2018: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/29454032/basal-polarization-of-the-immune-responses-to-streptococcus-agalactiae-susceptible-and-resistant-tilapia-oreochromis-niloticus
#4
Jiajie Zhu, Xi Gan, Qiuwei Ao, Xiashuang Shen, Yun Tan, Ming Chen, Yongju Luo, Hui Wang, Hesheng Jiang, Chao Li
One of the highest priority areas for improvement is the development of effective strategies for decreasing disease mortality levels in aquaculture production, a better understanding of the components of the fish immune system and their functions in the context of pathogen invasion is needed. Tilapia is the most common fish in South China, and Streptococcus agalactiae has become the most serious disease problem for tilapia industry in China. Here, we profiled gene expression differences between tilapia differing in their susceptibility to S...
February 14, 2018: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/29451838/serotype-distribution-of-streptococcus-pneumoniae-and-potential-impact-of-pneumococcal-conjugate-vaccines-in-china-a-systematic-review-and-meta-analysis
#5
Kaile Chen, Xiyan Zhang, Wei Shan, Genming Zhao, Tao Zhang
OBJECTIVE: Thirteen-valent pneumococcal conjugate vaccines (PCV13) was licensed for optional use in mainland China since 2017, but the uptake is low. To update the research evidence for the pneumococcal serotype distribution of pre-PCV era and to estimate the potential impact of PCVs, we performed a meta-analysis on the relevant publications concerning the Chinese population. METHODS: This systematic review and meta-analysis were conducted on the pneumococcal serotype distribution publications in mainland China from 2000 to 2016...
February 16, 2018: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/29448564/biocompatibility-evaluation-of-feldspathic-porcelain-with-nano-sized-silver-ion-particles
#6
Ji-Hyun Kim, Sang-Won Park, Hyun-Pil Lim, Chan Park, Kwi-Dug Yun
The major failure of dental restorations is caused by dental caries by S. mutans. This study evaluated the effect of nanosized silver ions in feldspathic porcelain on cytotoxicity and antimicrobial activity. The control group was feldspathic porcelain (Noritake EX-3, Kuraray Noritake Dental Inc., Japan) that did not contain Ag (silver). The experimental groups were feldspathic porcelain mixed with colloidal solutions of nanosized silver ions in mixtures of 5% 10%, 20%, 30%. Cell activity assays evaluated with osteoblast hFOB 1...
February 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29448217/a-simple-approach-for-fabrication-of-optical-affinity-based-bioanalytical-microsystem-on-polymeric-pen-foils
#7
Alena Semerádtová, Marcel Štofik, Oldřich Neděla, Ondřej Staněk, Petr Slepička, Zdeňka Kolská, Jan Malý
Herein, we report a novel concept of low-cost flexible platform for fluorescence-based biosensor. The surface of polyethylene naphthalate (PEN) foil was exposed to KrF excimer laser through a photolitographic contact mask. Laser initiated surface modification resulted in micro-patterned areas with surface functional groups available for localized covalent immobilization of biotin. High affinity binding protein (albumin-binding domain (ABD) of protein G, Streptococcus G148) recognizing human serum albumin (HSA), genetically fused with streptavidin (SA-ABDwt), was immobilized on the micro-patterned surface through biotin-streptavidin coupling...
February 2, 2018: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29447223/virome-and-bacteriome-characterization-of-children-with-pneumonia-and-asthma-in-mexico-city-during-winter-seasons-2014-and-2015
#8
Jose A Romero-Espinoza, Yazmin Moreno-Valencia, Rodrigo H Coronel-Tellez, Manuel Castillejos-Lopez, Andres Hernandez, Aaron Dominguez, Angel Miliar-Garcia, Arturo Barbachano-Guerrero, Rogelio Perez-Padilla, Alejandro Alejandre-Garcia, Joel A Vazquez-Perez
BACKGROUND: Acute asthma exacerbations and pneumonia are important causes of morbidity and mortality in children and may coexist in the same children, although symptom overlap may lead to difficulties in diagnosis. Microbial and viral diversity and differential abundance of either may play an important role in infection susceptibility and the development of acute and chronic respiratory diseases. OBJECTIVES: To describe the virome and bacteriome present in the upper respiratory tract of hospitalized children with a clinical diagnosis of asthma and pneumonia during an acute exacerbation and an acute respiratory illness ARI episode respectively...
2018: PloS One
https://www.readbyqxmd.com/read/29447196/nasopharyngeal-carriage-of-streptococcus-pneumoniae-among-hiv-infected-and-uninfected-children-5-years-of-age-before-introduction-of-pneumococcal-conjugate-vaccine-in-mozambique
#9
Jennifer R Verani, Sérgio Massora, Sozinho Acácio, Rita Teresa Dos Santos, Delfino Vubil, Fabiana Pimenta, Iaci Moura, Cynthia G Whitney, Maria Helena Costa, Eusébio Macete, Maria Benigna Matsinhe, Maria da Gloria Carvalho, Betuel Sigaúque
Nasopharyngeal carriage is a precursor for pneumococcal disease and can be useful for evaluating pneumococcal conjugate vaccine (PCV) impact. We studied pre-PCV pneumococcal carriage among HIV-infected and -uninfected children in Mozambique. Between October 2012 and March 2013, we enrolled HIV-infected children age <5 years presenting for routine care at seven HIV clinics in 3 sites, including Maputo (urban-south), Nampula (urban-north), and Manhiça (rural-south). We also enrolled a random sample of HIV-uninfected children <5 years old from a demographic surveillance site in Manhiça...
2018: PloS One
https://www.readbyqxmd.com/read/29447024/microbiology-and-clinical-outcomes-of-puerperal-sepsis-a-prospective-cohort-study
#10
Rumbidzai Majangara, Muchabayiwa Francis Gidiri, Zvavahera Mike Chirenje
The objectives of this study were to determine the identity and antibacterial susceptibility profiles of bacteria colonising the female genital tract and blood stream and their association with clinical outcomes in women with puerperal sepsis. A prospective descriptive cohort study was conducted at two tertiary hospitals in Zimbabwe. Endocervical swabs and blood were collected for culture and susceptibility testing from 151 consecutive women who met the World Health Organisation criteria for puerperal sepsis...
February 15, 2018: Journal of Obstetrics and Gynaecology: the Journal of the Institute of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/29446810/postoperative-endophtalmities-therapeuthic-results-and-early-vitrectomy
#11
Imen Zghal, Amine Souguir, Olfa Fekih, Amel Chebbi, Omar Romdhane, Hedi Bouguila, Leila Nacef
BACKGROUND: Postoperative endophthalmitis is a public health issue due to its bad prognosis; its treatment is both surgical and medical. Classically, surgical treatment was done if visual acuity is limited to light perception only. AIM: To evaluate therapeutic results Of postoperative endophtalmitieS and to Compare therapeutics almost used intravitreal injection of antibiotics versus early vitrectomy. METHODS: It's a retrospective comparative study includIng 120 cases of acute postoperative endophthalmitis hospitalized in a referral ophthalmology department between July 2007 and June 2013...
March 2017: La Tunisie Médicale
https://www.readbyqxmd.com/read/29445511/management-of-group-b-streptococcus-positive-pregnant-women-at-maternity-homes-in-japan-a-questionnaire-survey-of-compliance-among-midwives
#12
Kotomi Yamaguchi, Kazutomo Ohashi
Background: Per the 2014 Japanese Midwives Association (JMA) guidelines, midwives were allowed to manage the deliveries for group B streptococcus (GBS)-positive pregnant women in labour at maternity homes without the supervision of a medical doctor if they complied with the guidelines of the Japan Society of Obstetrics and Gynecology (JSOG), wherein midwives working for maternity homes are expected to cooperate with commissioned obstetricians and paediatricians in cooperative medical facilities...
2018: Maternal Health, Neonatology and Perinatology
https://www.readbyqxmd.com/read/29445454/rumen-protected-methionine-during-the-peripartal-period-in-dairy-cows-and-its-effects-on-abundance-of-major-species-of-ruminal-bacteria
#13
Mohamed K Abdelmegeid, Ahmed A Elolimy, Zheng Zhou, Vincenzo Lopreiato, Joshua C McCann, Juan J Loor
Background: Extensive degradation of amino acids in the rumen via microbial deamination decreases the post-ruminal availability of dietary indispensable amino acids. Together with the normal decrease in voluntary dry matter intake (DMI) around parturition in dairy cows, microbial metabolism contributes to a markedly negative balance of indispensable amino acids, including methionine which may be the first-limiting for milk production. The main objective of the current study was to profile changes in major bacterial species with key functions in cellulose and hemicellulose digestion, xylan breakdown, proteolytic action, propionic acid production, lactate utilization and ruminal biohydrogenation in cows supplemented with rumen-protected Methionine (SM; Smartamine M, Adisseo NA, Alpharetta, GA, USA) from -23 through 30 d relative to parturition...
2018: Journal of Animal Science and Biotechnology
https://www.readbyqxmd.com/read/29444837/whole-genome-sequence-analysis-of-streptococcus-pneumoniae-strains-that-cause-hospital-acquired-pneumonia-infections
#14
Bin Chang, Masatomo Morita, Ken-Ichi Lee, Makoto Ohnishi
Streptococcus pneumoniae colonizes the nasopharyngeal mucus in healthy individuals and can cause otitis media, pneumonia, and invasive pneumococcal diseases. In this study, we analyzed the S. pneumoniae strains that caused 19 pneumonia episodes in long-term inpatients with severe underlying disease in a hospital during a period of 14 months (from January 2014 to February 2015). Serotyping and whole genome sequencing analyses revealed that 18 of the 19 pneumonia cases were caused by S. pneumoniae strains belonging to 3 genetically distinct groups: clonal complex (CC) 9999, sequence type (ST) 282, and ST166...
February 14, 2018: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/29442395/paediatric-thoracic-empyema-in-the-tropical-north-queensland-region-of-australia-epidemiological-trends-over-a-decade
#15
Anil Gautam, Gregory G Wiseman, Marika L Goodman, Simon Ahmedpour, Daniel Lindsay, Adele Heyer, Harry Stalewski, Robert E Norton, Andrew V White
AIM: The Townsville Hospital and Health Service is the regional referral centre for children in the north of Queensland. Aboriginal and Torres Strait Islander (ATSI) people make up 7-10% of the population. Increasing numbers of children with paediatric thoracic empyema (pTE) are being referred to Townsville Hospital and Health Service for management. This study aims to describe the incidence rates, epidemiology, microbiology and trends of this disease in North Queensland over a 10-year period...
February 14, 2018: Journal of Paediatrics and Child Health
https://www.readbyqxmd.com/read/29442290/the-optimisation-of-the-expression-of-recombinant-surface-immunogenic-protein-of-group-b-streptococcus-in-escherichia-coli-by-response-surface-methodology-improves-humoral-immunity
#16
Diego A Díaz-Dinamarca, José I Jerias, Daniel A Soto, Jorge A Soto, Natalia V Díaz, Yessica Y Leyton, Rodrigo A Villegas, Alexis M Kalergis, Abel E Vásquez
Group B Streptococcus (GBS) is the leading cause of neonatal meningitis and a common pathogen in livestock and aquaculture industries around the world. Conjugate polysaccharide and protein-based vaccines are under development. The surface immunogenic protein (SIP) is a conserved protein in all GBS serotypes and has been shown to be a good target for vaccine development. The expression of recombinant proteins in Escherichia coli cells has been shown to be useful in the development of vaccines, and the protein purification is a factor affecting their immunogenicity...
February 13, 2018: Molecular Biotechnology
https://www.readbyqxmd.com/read/29436150/broad-spectrum-neutralization-of-pore-forming-toxins-with-human-erythrocyte-membrane-coated-nanosponges
#17
Yijie Chen, Mengchun Chen, Yue Zhang, Joo Hee Lee, Tamara Escajadillo, Hua Gong, Ronnie H Fang, Weiwei Gao, Victor Nizet, Liangfang Zhang
Neutralization of bacterial toxins has become a compelling approach to treating bacterial infections as it may pose less selective pressure for the development of bacterial resistance. Currently, the majority of toxin neutralization platforms act by targeting the molecular structure of the toxin, which requires toxin identification and customized design for different diseases. Therefore, their development has been challenged by the enormous number and complexity of bacterial toxins. Herein, biomimetic toxin nanosponges are formulated by coating membranes of human red blood cells (hRBCs) onto polymeric nanoparticles, which act as a toxin decoy to absorb and neutralize a broad-spectrum of hemolytic toxins regardless of their molecular structure...
February 13, 2018: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/29435555/opioid-analgesic-use-and-risk-for-invasive-pneumococcal-diseases-a-nested-case-control-study
#18
Andrew D Wiese, Marie R Griffin, William Schaffner, C Michael Stein, Robert A Greevy, Edward F Mitchel, Carlos G Grijalva
Background: Although certain opioid analgesics have immunosuppressive properties and increase the risk for infections in animals, the clinical effects of prescription opioid use on infection risk among humans are unknown. Objective: To test the hypothesis that prescription opioid use is an independent risk factor for invasive pneumococcal disease (IPD). Design: Nested case-control study. Setting: Tennessee Medicaid database linked to Medicare and Active Bacterial Core surveillance system databases (1995 to 2014)...
February 13, 2018: Annals of Internal Medicine
https://www.readbyqxmd.com/read/29433693/pharmacocin%C3%A3-tique-et-pharmacodynamie-des-antibiotiques-est-ce-diff%C3%A3-rent-en-n%C3%A3-onatologie
#19
R Cohen, M Tauzin, S Béchet, L Caeymaex
Pharmacokinetic and pharmacodynamics (PK/PD) data on antimicrobial agents enable physicians to optimize their use in clinical practice. Neonates exhibit a large inter-individual variability in antibiotic levels due to immaturity and maturational changes in the first weeks of life. This variability explains the large therapeutic margins needed to ensure an optimal efficacy of antibiotics. These pharmacokinetic characteristics have to be taken into account when treating neonatal sepsis, along with pharmacodynamics targets for each antibiotic and notably minimal inhibitory concentration for usual causes of neonatal bacterial infections (group B streptococcus and Escherichia coli)...
December 2017: Archives de Pédiatrie: Organe Officiel de la Sociéte Française de Pédiatrie
https://www.readbyqxmd.com/read/29432047/community-acquired-meningitis-in-hiv-infected-patients-in-the-united-states
#20
Karen J Vigil, Lucrecia Salazar, Rodrigo Hasbun
We conducted a retrospective study of 549 adults admitted with community-acquired meningitis (CAM) to several hospitals in New Orleans, LA and Houston, TX between 1999 and 2014 to characterize the current epidemiology, clinical manifestations, cerebrospinal fluid (CSF) characteristics, and outcomes of CAM between HIV-infected and uninfected patients and to identify risk factors for adverse outcomes in CAM. Bivariate analysis and logistic regression analysis were used to identify prognostic factors. A total of 1022 patients with CAM were screened...
February 2018: AIDS Patient Care and STDs
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