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streptococcus viridans

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https://www.readbyqxmd.com/read/29912251/-microorganisms-isolated-from-blood-cultures-in-children-with-cancer-and-high-risk-febrile-neutropenia-from-five-hospitals-in-santiago-chile-2012-2015
#1
M Eliana Maldonado, Mirta Acuña, Ana M Álvarez, Carmen L Avilés, Verónica de la Maza, Carmen Salgado, Juan Tordecilla, Mónica Varas, Marcela Venegas, Milena Villarroel, Marcela Zubieta, M Elena Santolaya
BACKGROUND: Microorganisms isolated from blood cultures (BC) in patients with febrile neutropenia (NF) vary over time, requiring systematic monitoring to guide appropriate empirical therapy. AIM: To identify microorganisms isolated from BC and their antimicrobial resistance profile in children with cancer and high risk NF. METHOD: Prospective, multicenter study. The analysis included episodes of high-risk FN with positive BC in children under 18 years of age treated in five hospitals in Santiago, Chile, 2012-2015...
April 2018: Revista Chilena de Infectología: órgano Oficial de la Sociedad Chilena de Infectología
https://www.readbyqxmd.com/read/29773945/predictive-factors-in-the-treatment-of-streptococcal-endophthalmitis
#2
Yosanan Yospaiboon, Kidakarn Meethongkam, Suthasinee Sinawat, Wipada Laovirojjanakul, Tanapat Ratanapakorn, Thuss Sanguansak, Chavakij Bhoomibunchoo
Objective: To evaluate visual outcomes and possible predictive factors in the treatment of infectious endophthalmitis caused by Streptococcus species during 2012-2016 at a large referral eye center in northeastern Thailand. Methods: A retrospective medical record chart review of patients with culture-positive endophthalmitis caused by Streptococcus species was conducted. Demographic data including age, gender, occupation, duration of symptoms, time to surgery, surgical procedures, initial visual acuity at presentation, and final visual acuity after treatment were collected and analyzed...
2018: Clinical Ophthalmology
https://www.readbyqxmd.com/read/29755627/molecular-diagnosis-of-bacterial-definite-infective-endocarditis-by-real-time-polymerase-chain-reaction
#3
Reza Faraji, Mostafa Behjati-Ardakani, Nooshin Faraji, Seyed Mohammad Moshtaghioun, Seyed Mehdi Kalantar, Ali Pedarzadeh, Hengameh Zandi, Mohammadtaghi Sarebanhassanabadi, Nastaran Ahmadi, Ali Dehghani Firoozabadi
Infective endocarditis (IE) can be diagnosed using the Duke criteria, which cannot be conclusive especially when the results of blood cultures are negative. This study aimed at using real-time polymerase chain reaction (PCR) technique to isolate bacteria present in whole blood samples of patients with definitive IE on the basis of the method designed in this study. This laboratory and test study was conducted on 20 whole blood samples taken from patients with definitive IE. Real-time PCR of the 16s rRNA was utilized to directly analyze whole blood samples to diagnose bacterial IE...
April 2018: Cardiology Research
https://www.readbyqxmd.com/read/29752592/the-rate-of-endophthalmitis-after-pars-plana-vitrectomy-and-its-risk-factors
#4
Seyed Ali Tabatabaei, Mohammad Soleimani, Hadi Vakili, Morteza Naderan, Alireza Lashay, Houshang Faghihi, Mehdi Yaseri
PURPOSE: To study the incidence of endophthalmitis after pars plana vitrectomy, its causative organisms, and visual acuity outcomes. PATIENTS AND METHODS: In this retrospective, comparative study, the medical records of patients with acute-onset postoperative endophthalmitis after pars plana vitrectomy at Farabi Eye Hospital, Tehran, Iran, during a 12-year period between January 2004 and November 2015 were reviewed. To compare the endophthalmitis patients with other cases who underwent pars plana vitrectomy at the same day and also the same operating room, a control group was developed by gathering the data from surgical records...
May 11, 2018: International Ophthalmology
https://www.readbyqxmd.com/read/29730811/phlegmonous-gastritis-associated-with-advanced-esophageal-cancer
#5
Nobutoshi Hagiwara, Takeshi Matsutani, Hiroki Umezawa, Munenaga Nakamizo, Kazuhiko Yokoshima, Eriko Shinozuka, Tsutomu Nomura, Eiji Uchida
Phlegmonous gastritis is a rapidly progressive bacterial infection of the stomach wall. It has a high mortality rate and aggressive treatment, either with antibiotics or surgical resection, is required. Here, we report an extremely rare case of phlegmonous gastritis associated with advanced esophageal cancer. A 65-year-old Japanese man was urgently admitted to the hospital due to pyrexia and gastrointestinal symptoms. Abdominal computed tomography revealed widespread diffuse thickening of the gastric wall. On endoscopic examination, an ulcerative mass was detected at the lower thoracic esophagus, and a markedly elevated submucosal lesion was present in the middle of the stomach body...
May 5, 2018: Clinical Journal of Gastroenterology
https://www.readbyqxmd.com/read/29718124/gut-dysbiosis-associated-with-hepatitis-c-virus-infection
#6
Takako Inoue, Jiro Nakayama, Kei Moriya, Hideto Kawaratani, Rie Momoda, Kiyoaki Ito, Etsuko Iio, Shunsuke Nojiri, Kei Fujiwara, Masashi Yoneda, Hitoshi Yoshiji, Yasuhito Tanaka
Background: Little is known about the effect of hepatitis C virus (HCV) infection on gut microbiota and the relationship between alteration of gut microbiota and chronic hepatitis C (CHC) progression. We performed a comparative study of gut microbiota composition between CHC patients and healthy individuals. Methods: Fecal samples from 166 CHC patients were compared with those from 23 healthy individuals; the gut microbiota community was analyzed using 16S ribosomal RNA gene sequencing...
May 1, 2018: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29651552/prevention-of-high-level-daptomycin-resistance-emergence-in-vitro-in-streptococcus-mitis-oralis-by-using-combination-antimicrobial-strategies
#7
Brianne Zapata, Danya N Alvarez, Sabrina Farah, Cristina Garcia-de-la-Maria, Jose M Miro, George Sakoulas, Arnold S Bayer, Nagendra N Mishra
Among the viridans group streptococci, S. mitis-oralis strains are frequently resistant to multiple β-lactams and tolerant to vancomycin (VAN). This scenario has led to the proposed clinical use of newer agents, like daptomycin (DAP) for such S. mitis-oralis strains. However, recent recognition of the rapid and durable emergence of high-level DAP-resistance (DAP-R; DAP MICs > 256 µg/ml) induced by DAP exposures in vitro and in vivo has dampened enthusiasm for such approaches. In this study, we evaluated a broad range of DAP combination regimens in vitro for their capacity to prevent emergence of high-level DAP-R in a prototype S...
April 12, 2018: Current Microbiology
https://www.readbyqxmd.com/read/29617499/mortality-predictors-in-the-surgical-treatment-of-active-infective-endocarditis
#8
Jenny Lourdes Rivas de Oliveira, Magaly Arrais Dos Santos, Renato Tambellini Arnoni, Auristela Ramos, Dorival Della Togna, Samira Kaissar Ghorayeb, Roberto Tadeu Magro Kroll, Luiz Carlos Bento de Souza
INTRODUCTION: Active infective endocarditis is associated with high morbidity and mortality. Surgery is indicated in high-risk conditions, and the main determinants of mortality in surgical treatment should be evaluated. OBJECTIVE: To identify mortality predictors in the surgical treatment of active infective endocarditis in a long-term follow-up. METHODS: This prospective observational study involved 88 consecutive patients diagnosed with active infective endocarditis, who underwent surgery between January 2005 and December 2015...
January 2018: Brazilian Journal of Cardiovascular Surgery
https://www.readbyqxmd.com/read/29592995/a-rare-case-of-pyogenic-pericarditis-secondary-to-streptococcus-constellatus
#9
Sehem Ghazala, Todd Rabkin Golden, Sumaya Farran, Tirdad T Zangeneh
We report an extremely rare case of purulent pericarditis caused by the normally commensal oral flora, Streptococcus constellatus, a viridans Streptococcal species and member of the S. anginosus group (previously also known by the eponymous ' S. milleri', for American Willoughby Dayton Miller). This case is a previously healthy 71-year-old immunocompetent woman from Arizona who presented with a 5-day history of progressive shortness of breath and chest tightness, and subjective fever and chills, but without history of nausea, vomiting, night sweats, recent travel, autoimmune disease or sick contacts...
March 28, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29567126/distribution-of-streptococcal-groups-causing-infective-endocarditis-a-descriptive-study
#10
So Lim Kim, Steven M Gordon, Nabin K Shrestha
The purpose of this study was to describe the distribution of streptococci causing infective endocarditis (IE). A total of 296 patients with definite IE admitted from July 2007 to December 2014 were identified, with microbial identification done by a combination of blood culture, valve culture, and valve polymerase chain reaction (PCR). The overall distribution of streptococci was 76% viridans (n = 224), 17% pyogenic (50), 6% nutritionally variant (17), and 2% anaerobic (5). Sixty-three (21%) viridans group streptococci were not identified further...
February 24, 2018: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/29566581/investigation-of-bacteremia-after-debonding-procedures
#11
Yasin Akbulut, Merve Goymen, Yasemin Zer, Ayse Buyuktas Manay
OBJECTIVE: The purpose of this study is to investigate the effect of debonding procedures after completion of orthodontic treatments on bacteremia. MATERIALS AND METHODS: Twenty-eight patients who were treated with fixed orthodontic treatment at the Faculty of Dentistry's Department of Orthodontics at Gaziantep University and who had an indication of debonding were selected for this study, and blood samples were taken from these patients at different times and examined for bacteremia...
March 23, 2018: Acta Odontologica Scandinavica
https://www.readbyqxmd.com/read/29563488/pyogenic-ventriculitis-and-meningitis-caused-by-streptococcus-acidominimus-in-humans-a-case-report
#12
Gaurang S Shah
BACKGROUND Streptococcus acidominimus, which belongs to the viridans streptococci group, is rarely considered pathogenic in humans. However, over the past 10 years, this bacterium has been reported to cause serious infections in humans, particularly among the critically ill. This article is the first case report of pyogenic ventriculitis (PV) and meningitis caused by S. acidominimus in North America. CASE REPORT A 49-year-old Asian male presented to the emergency department with complaints of a headache, fever greater than 37...
March 22, 2018: American Journal of Case Reports
https://www.readbyqxmd.com/read/29525758/atrial-myxoma-presenting-as-infective-endocarditis
#13
Gerald Paul Fitzgerald, John Joseph Coughlan, Zahir Satti, Samer Arnous
A 23-year-old Asian student presented to our service with a 1-month history of fever, weight loss of 10 kg, night sweats, fatigue and general malaise. He was previously well with no significant medical or family history. He had a low-grade pyrexia and cardiac auscultation revealed a diastolic murmur consistent with 'tumour plop'. He had no sequelae of endocarditis. He had low-grade pyrexia of 37.7°C, and ECG showed sinus tachycardia at 130 bpm. He had raised inflammatory markers and was started on broad spectrum antibiotics...
March 9, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29518552/early-blood-stream-infections-after-bmt-are-associated-with-cytokine-dysregulation-and-poor-overall-survival
#14
Elizabeth M Catchpoole, Caitlin E Thirunavukarasu, Antiopi Varelias, Sanmarié Schlebusch, Stuart Olver, Nienke Zomerdijk, Emma Osland, Glen A Kennedy, Siok-Keen Tey, Geoffrey R Hill, Kate A Markey
The key complications of allogeneic bone marrow transplantation (BMT) remain graft-versus-host disease (GVHD) and opportunistic infection. We have analyzed the blood stream infections (BSIs) occurring between day -7 and day 100 in a cohort of 184 adult patients undergoing allogeneic BMT in our center. A total of 167 of the 184 patients (91%) had blood cultures collected, and 69 (38%) patients had a confirmed BSI. Enterobacteriaceae, Pseudomonas aeruginosa, Enterococcus spp., and viridans Streptococcus spp. were the most commonly isolated organisms...
March 5, 2018: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/29518512/septic-carotid-endarterectomy-patch-as-a-result-of-preoperative-tooth-extraction
#15
Kevin C Fok, Yiu Che Chan, Yuk Law, Stephen W Cheng
Infected carotid patches are rare. We present a gentleman who had an elective carotid endarterectomy with Dacron patch closure for symptomatic carotid stenosis under regional anesthesia, and he presented 1 month later with a discharging sinus at the lower aspect of the neck wound. Computed tomography scan showed a rim-enhancing collection next to the carotid bifurcation. He subsequently underwent patch excision and repair with autologous saphenous vein graft, with good recovery. Of significance was that he had a dental extraction for a loose tooth 1 day before the index operation as advised by the anesthetist...
March 5, 2018: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/29491241/surgically-treated-community-acquired-brain-abscess
#16
Heui Seung Lee, Jeong Hoon Kim, Young-Hoon Kim, Seungjoo Lee
Community-acquired brain abscess is still encountered in clinical practice and causes considerable complications, despite improvements in hygiene in modernised societies. This study aimed to identify potential risk factors pertaining to predisposing infections and microorganisms to facilitate effective treatment of the brain abscess.Of 121 surgically treated patients with brain abscess the most frequent predisposing condition was odontogenic infections (49/121 patients, 40.5%) followed by sinusitis (14/121, 11...
February 28, 2018: Japanese Journal of Infectious Diseases
https://www.readbyqxmd.com/read/29460538/detection-of-endocarditis-bacteria-in-tonsillar-mucosa-of-afghan-population
#17
F Ruggiero, D Carbone, R Mugavero, A Palmieri, D Lauritano, L Baggi, M Nardone, F Carinci, M Martinelli
Endocarditis is a cardiovascular disease caused by the inflammation of the inner tissues of the heart, the endocardium, usually of the valves. Bacteraemia is essential in the development of endocarditis, and there are some findings that the main pathogens of endocarditis are viridans group streptococci: Streptococcus oralis, Streptococcus sanguinis, and Enterococcus faecalis. There is strong evidence that endocarditis bacteria are present in the tonsillar microbiota, so that tonsillar infection is associated with an increased risk of endocarditis...
January 2018: Journal of Biological Regulators and Homeostatic Agents
https://www.readbyqxmd.com/read/29460534/focus-on-periodontal-disease-and-development-of-endocarditis
#18
F Carinci, M Martinelli, M Contaldo, R Santoro, F Pezzetti, D Lauritano, V Candotto, D Mucchi, A Palmieri, A Tagliabue, L Tettamanti
Infective endocarditis is a devastating disease with high morbidity and mortality. The link to oral bacteria has been known for many decades and has caused ongoing concern for dentists, patients and cardiologists. The microbiota of the mouth is extremely diverse and more than 700 bacterial species have been detected. Half of them are uncultivable so far. Oral microbiota is not uniform, specific sites exist in the mouth such as tongue, palate, cheek, teeth and periodontal pockets that have their own microbiota...
January 2018: Journal of Biological Regulators and Homeostatic Agents
https://www.readbyqxmd.com/read/29410368/surveillance-of-tigecycline-activity-tested-against-clinical-isolates-from-a-global-north-america-europe-latin-america-and-asia-pacific-collection-2016
#19
Michael A Pfaller, Michael D Huband, Jennifer M Streit, Robert K Flamm, Helio S Sader
Tigecycline and comparators were tested by the reference broth microdilution method against 33 348 non-duplicate bacterial isolates collected prospectively in 2016 from medical centres in the Asia-Pacific (3443 isolates), Europe (13 530 isolates), Latin America (3327 isolates) and the USA (13 048 isolates). Among 7098 Staphylococcus aureus isolates tested, >99.9% were inhibited by ≤0.5 mg/L tigecycline (MIC50/90 , 0.06/0.12 mg/L), including >99.9% of methicillin-resistant S. aureus and 100.0% of methicillin-susceptible S...
February 2, 2018: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/29378719/surveillance-of-omadacycline-activity-tested-against-clinical-isolates-from-the-united-states-and-europe-as-part-of-the-2016-sentry-antimicrobial-surveillance-program
#20
Michael A Pfaller, Michael D Huband, Dee Shortridge, Robert K Flamm
Omadacycline was tested against 21,000 bacterial isolates collected prospectively from medical centers in Europe and the United States during 2016. Omadacycline was active against Staphylococcus aureus (MIC50 /MIC90 , 0.12/0.25 mg/liter), including methicillin-resistant S. aureus (MRSA); streptococci (MIC50 /MIC90 , 0.06/0.12 mg/liter), including Streptococcus pneumoniae , viridans group streptococci, and beta-hemolytic streptococci; Enterobacteriaceae , including Escherichia coli (MIC50 /MIC90 , 0.5/2 mg/liter); Haemophilus influenzae (MIC50 /MIC90 , 1/1 mg/liter); and Moraxella catarrhalis (MIC50 /MIC90 , 0...
April 2018: Antimicrobial Agents and Chemotherapy
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