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streptococcus viridans

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https://www.readbyqxmd.com/read/28202116/-pathogens-of-infections-in-the-induction-period-of-childhood-acute-lymphoblastic-leukemia-and-drug-resistance-of-isolated-strains
#1
Zai-Sheng Chen, Ling Zheng, Yi-Qiao Chen, Jing-Hui Yang, Jian Li
OBJECTIVE: To investigate the infections occurring in the induction period of childhood acute lymphoblastic leukemia (ALL), the pathogens of the infections, and drug resistance of isolated strains. METHODS: A retrospective analysis was performed for the clinical data of 130 children with newly-diagnosed childhood ALL. Infections occurring during the induction chemotherapy, pathogenic strains, and drug-resistance spectrum were analyzed. RESULTS: The incidence rate of clinical infection and/or microbial infection reached 76...
February 2017: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
https://www.readbyqxmd.com/read/28193649/pbp2x-in-streptococcus-pseudopneumoniae-an-insight-into-the-diversity-of-pbp2x-alleles-and-mutations-in-viridans-streptococci
#2
Mark van der Linden, Julia Otten, Carina Bergmann, Cristina Latorre, Josefina Liñares, Regine Hakenbeck
Speciation of commensal streptococci is an everlasting problem due to their ability for genetic transformation. A new challenge in this respect is the recently described S. pseudopneumoniae as a new species, distinguished from closely related pathogenic S. pneumoniae and commensal S. mitis by a variety of physiological and molecular biological tests. Fortyone atypical S. pneumoniae have been collected at the National Reference Center for Streptococci (NRSG) in Germany. MLST analysis confirmed the species S...
February 13, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28167542/in-vitro-activity-of-delafloxacin-when-tested-against-contemporary-bacterial-pathogens-from-the-united-states-and-europe-2014
#3
M A Pfaller, H S Sader, P R Rhomberg, R K Flamm
The in vitro activities of delafloxacin and comparator antimicrobial agents were tested against 6,485 bacterial isolates from medical centers in Europe (EU) and the United States (US) in 2014. Delafloxacin was the most potent agent tested against methicillin-susceptible S. aureus (MSSA), MRSA, Streptococcus pneumoniae, viridans group streptococci, and β-hemolytic streptococci and had activity similar to that of ciprofloxacin and levofloxacin against certain members of the Enterobacteriaceae. Overall the broadest coverage of tested pathogens (Gram-positive cocci and Gram-negative bacilli) was observed with meropenem and tigecycline in both EU and US...
February 6, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28144393/percutaneous-drainage-as-a-first-therapeutic-step-prior-to-surgery-in-liver-hydatid-cyst-abscess-is-it-worth-it
#4
Aylhin J Lopez-Marcano, Jose M Ramia, Vladimir Arteaga, Roberto De la Plaza, Jhonny D Gonzales, Anibal Medina
AIM: To delay surgery until the patient is in a better condition, and thus to decrease postoperative morbidity. METHODS: Using this algorithm we treated three patients aged 55, 75 and 80 years. In all three patients the clinical presentation was fever without a clear source of infection; all had nonspecific symptoms such as general malaise, dyspnea, and abdominal discomfort in the previous 15 d. They came to the emergency room at our hospital due to deterioration of their general condition...
January 18, 2017: World Journal of Hepatology
https://www.readbyqxmd.com/read/28129822/-antimicrobial-spectrum-of-dalbavancin-mechanism-of-action-and-in-vitro-activity-against-gram-positive-microorganisms
#5
Emilia Cercenado
Because of the increase in bacterial resistance, there is a need for new antimicrobial agents. Dalbavancin is a semisynthetic glycopeptide that inhibits the late stages of bacterial cell wall synthesis in the same way as vancomycin, but in addition, its lipophilic side chain anchors dalbavancin to the cellular membrane and allows enhanced activity compared with that of vancomycin. Dalbavancin possesses a broad spectrum of in vitro activity against Gram-positive aerobic and anaerobic microorganisms, being 4-8 times more potent than vancomycin...
January 2017: Enfermedades Infecciosas y Microbiología Clínica
https://www.readbyqxmd.com/read/28080916/aerobic-microflora-and-endoparasites-of-freshly-shot-wild-agouti-dasyprocta-leporina-in-trinidad-west-indies
#6
Rod Suepaul, Roxanne Charles, Francis Dziva
The agouti ( Dasyprocta leporina ) is a New World wild rodent hunted for its meat in Trinidad and other Latin American countries. Studies on agouti under captive conditions have yielded some data on health-related aspects, but relatively very little is known about their wild counterparts. The environment of the agouti can influence the microflora and parasites harbored by the animals, which may contain zoonotic pathogens. Here, the microflora found on the nasal mucosa and sections of the intestinal tract and endoparasites of freshly shot agouti from various areas of Trinidad are described...
December 2016: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
https://www.readbyqxmd.com/read/28061897/bacteria-endocarditis-consolidation-with-vertebra-bone-tuberculosis-a-case-report
#7
Yan Liu, Xiaoming Wang, Zhibin Wang, Yongsheng Zhu, Liying Zhang, Xiaoli Li, Rong Xu, Wei Ge
BACKGROUND: The clinical features of bacteria endocarditis became atypical when consolidated with other conditions such as tuberculosis (TB). Especially, the symptoms of bacteria endocarditis (BE) which were hidden behind the TB fever often lead to misdiagnosis and missed diagnosis. CASE PRESENTATION: A 56-year-old male with thoracic vertebra bone TB history presented with low-grade fever, shortness of breath and cardiac souffle. After conventional antibiotic therapy and strengthen anti-tuberculosis treatment condition did not be improved...
January 6, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28054228/polymicrobial-pneumococcal-bacteraemia-a-case-control-study
#8
I Grau, C Ardanuy, M H Schulze, J Liñares, R Pallares
Polymicrobial bacteraemia involving Streptococcus pneumoniae and other bacteria (e.g. Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, Haemophilus influenza, viridans streptococci, Salmonella spp.) occurred in 3.4% of our pneumococcal bacteraemia cases. Compared with 308 controls (monomicrobial bacteraemia), the 77 polymicrobial cases included more males (83 vs 62%, p = 0.001), had serious underlying diseases (100 vs 80%, p < 0.001), abdominal infection (18 vs 5%, p < 0.001), nosocomial infection (33 vs 8%, p < 0...
January 4, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/28053215/improved-differentiation-of-streptococcus-pneumoniae-and-other-s-mitis-group-streptococci-by-maldi-biotyper-using-an-improved-maldi-biotyper-database-content-and-a-novel-result-interpretation-algorithm
#9
Inka Harju, Christoph Lange, Markus Kostrzewa, Thomas Maier, Kaisu Rantakokko-Jalava, Marjo Haanperä
Reliable distinction of Streptococcus pneumoniae and viridans group streptococci is important because of the different pathogenic properties of these organisms. Differentiation between S. pneumoniae and closely related S. mitis species group streptococci has always been challenging, even when using such modern methods as 16S rRNA gene sequencing or matrix-assisted laser desorption/ionization-time of flight (MALDI-TOF) mass spectrometry. In this study, a novel algorithm combined with an enhanced database was evaluated for the differentiation between S...
January 4, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28032700/management-of-acute-hematogenous-infection-following-total-knee-arthroplasty-a-case-series-of-11-patients
#10
Rui He, Liu Yang, Lin Guo, Hao Chen, Ying Zhang, Dian-Ming Jiang
OBJECTIVE: Acute hematogenous infection is a devastating complication that can occur after total knee arthroplasty (TKA). The best strategies for management of this infection remain controversial. Two-stage revision has been well described as the gold standard for the management of chronic late infections. However, there is a paucity of information presently available on the management and outcomes of patients treated for acute hematogenous infections. The purpose of the present study was to report the outcome of acute hematogenous infections following TKA with the treatment of irrigation, debridement, and retention of the prosthetic components...
November 2016: Orthopaedic Surgery
https://www.readbyqxmd.com/read/27989071/broad-range-16s-rdna-pcr-on-heart-valves-in-infective-endocarditis
#11
Manica Müller Premru, Tatjana Lejko Zupanc, Tomislav Klokočovnik, Eva Ruzić Sabljić, Tjaša Cerar
BACKGROUND: Infective endocarditis (IE) is diagnosed by blood and/or resected valve cultivation and echocardiographic findings, as defined by the Duke criteria. Unfortunately, cultures may be negative due to prior antibiotic therapy or fastidious or slow-growing microorganisms. The study aim was to investigate the value of the broad-range polymerase chain reaction (PCR) in addition to blood and valve culture for the detection of causative microorganisms. METHODS: Between February 2012 and March 2015, valve samples from 36 patients undergoing cardiac surgery were analyzed; of these patients, 26 had a preoperative diagnosis of IE and 10 served as controls...
March 2016: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/27940705/epidemiology-of-invasive-early-onset-neonatal-sepsis-2005-to-2014
#12
Stephanie J Schrag, Monica M Farley, Susan Petit, Arthur Reingold, Emily J Weston, Tracy Pondo, Jennifer Hudson Jain, Ruth Lynfield
BACKGROUND: Group B Streptococcus (GBS) and Escherichia coli have historically dominated as causes of early-onset neonatal sepsis. Widespread use of intrapartum prophylaxis for GBS disease led to concerns about the potential adverse impact on E coli incidence. METHODS: Active, laboratory, and population-based surveillance for culture-positive (blood or cerebrospinal fluid) bacterial infections among infants 0 to 2 days of age was conducted statewide in Minnesota and Connecticut and in selected counties of California and Georgia during 2005 to 2014...
December 2016: Pediatrics
https://www.readbyqxmd.com/read/27939809/prevalence-of-macrolide-lincosamide-resistance-and-multidrug-resistance-phenotypes-in-streptococcal-isolates-causing-infections-in-european-hospitals-evaluation-of-the-in-vitro-activity-of-oritavancin-and-comparator-agents
#13
Rodrigo E Mendes, Mariana Castanheira, David J Farrell, Robert K Flamm, Helio S Sader, Ronald N Jones
The aim of this study was to evaluate the prevalence of resistance to erythromycin alone (M) and to erythromycin and clindamycin (cMLSB) as well as multidrug resistance (MDR) phenotypes (resistance to at least three classes of drugs) among clinical enterococci from European countries and adjacent geographic regions. The in vitro activity of oritavancin against these isolates was also evaluated. A total of 2569 streptococci collected from 12 European countries as well as Russia, Turkey and Israel were included...
November 2, 2016: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/27920864/clinical-case-report-discitis-osteomyelitis-complicated-by-inferior-vena-cava-venous-thrombosis-and-septic-pulmonary-emboli
#14
Zerwa Farooq, Brooke Devenney-Cakir
Viridans group streptococcus is an infrequent cause of osteomyelitis that is found in association with infective endocarditis. Only a few studies report viridans osteomyelitis in the absence of endocarditis. Vertebral pyogenic osteomyelitis can sometimes be complicated by psoas or paraspinal abscesses. These intra-abdominal and/or pelvic collections can very rarely result in venous thrombosis. A paraspinal abscess resulting in inferior vena cava (IVC) thrombosis has only been reported once in the literature...
December 2016: Radiology case reports
https://www.readbyqxmd.com/read/27899019/antibiotic-resistance-in-severe-orofacial-infections
#15
Min Kyoung Kim, Sung-Kiang Chuang, Meredith August
PURPOSE: This study assessed the antibiotic resistance profile in patients with severe orofacial infections treated at a single institution from 2009 through 2014. Factors contributing to resistance were studied. The resistance profile was compared with that of a cohort of similar patients treated a decade previously to identify changes in antibiotic resistance. In addition, the effect of antibiotic resistance on in-hospital course was studied. MATERIALS AND METHODS: This was a 5-year retrospective cohort study...
November 9, 2016: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/27885814/trends-microbiology-and-outcomes-of-infective-endocarditis-in-children-during-2000-2010-in-the-united-states
#16
Shipra Gupta, Ankit Sakhuja, Eric McGrath, Basim Asmar
BACKGROUND: We studied the incidence, trend, underlying conditions, microbiology, and outcomes of infective endocarditis (IE) in children during 11 years using Nationwide Inpatient Sample (NIS) database. This is the largest all-payer inpatient care database in the United States containing data for more than 8 million hospital stays from over 1000 hospitals. METHODS: NIS data from 2000 to 2010 of primary discharge diagnosis of IE in children aged ≤19 years old were studied...
November 25, 2016: Congenital Heart Disease
https://www.readbyqxmd.com/read/27884664/bacterial-contamination-of-saline-used-for-epidural-procedures-in-an-obstetric-setting-a-randomised-comparison-of-two-drawing-up-techniques
#17
M Onofrei, M Y Wee, B Parker, N Wee, S Hill
BACKGROUND: There is little evidence to inform practice regarding the optimum aseptic technique of drawing up saline for epidural insertion. Our regional practice is to draw up saline from a non-sterile packaged plastic ampoule, therefore introducing the risk of bacterial contamination. Usually, the anaesthetist draws up saline directly from the vial held by an assistant using a needle (needle technique). Alternatively, the saline vial is emptied onto a sterile tray by an assistant and then drawn up by the anaesthetist (tray technique)...
February 2017: International Journal of Obstetric Anesthesia
https://www.readbyqxmd.com/read/27862152/cutaneous-polyarteritis-nodosa-localized-to-a-region-of-lymphedema-secondary-to-streptococcus-viridans-cellulitis-and-multiple-surgeries
#18
Andrew Matsumoto, Rami N Al-Rohil, Marina Bravin, Lori Anderson, Danielle Wroblewski, John A Carlson
Cutaneous polyarteritis nodosa (CPAN) is a chronic, indolent, single organ arteritis that generally presents with lower extremity nodules and/or livedo racemosa, accompanied by malaise and arthralgias. CPAN is often triggered by infection, commonly Group A streptococcal species, and is considered an autoimmune reaction. Scarring from surgery and obliterative lymphangiitis from bacterial cellulitis are the causes of lymphedema. Lymphedematous skin is predisposed to autoimmune disorders. Herein we report a 53-year-old woman who developed CPAN restricted to a localized area of the right upper arm-shoulder that had undergone multiple surgeries, complicated by episodes of Streptococcus viridans cellulitis...
February 2017: Journal of Cutaneous Pathology
https://www.readbyqxmd.com/read/27835845/pronounced-heterogeneity-observed-in-high-level-daptomycin-resistant-viridans-group-streptococci
#19
Ronda L Akins, Katie E Barber, Kelli L Palmer
Viridans group streptococci (VGS) have demonstrated high-level daptomycin resistance (HLDR) upon daptomycin exposure. This study evaluated the extent of heterogeneity and whether dose escalation or combination therapy could prevent resistance development. Five VGS strains (daptomycin MICs 0.25-2mg/L) were evaluated. In vitro models utilised simulated daptomycin dosages of 4, 6, 8 and 12mg/kg with estimated fCmax of 4.1, 6.6, 8.6 and 12.9mg/L, respectively. Time-kill studies included fCmax simulations of daptomycin alone or combined with ceftriaxone, gentamicin, linezolid, rifampicin or vancomycin...
December 2016: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/27816682/acute-meningitis-of-piglets-and-mice-caused-by-co-infected-with-streptococcus-suis-and-aerococcus-viridans
#20
Zihao Pan, Ye Ma, Jiale Ma, Wenyang Dong, Huochun Yao
The two opportunistic pathogens, Streptococcus suis (S. suis) and Aerococcus. viridans (A. viridans) were isolated from the brains of piglets suffered bacterial meningitis in a farm of China. The murine model has been established to evaluate the pathogenicity and symbiotic relationship of S. suis and A. viridans simultaneously infection. Our results demonstrated the ability of new serotype S. suis to cause the classical bacterial meningitis and death were greatly enhanced during co-infection with A. viridans in mice at a proportion...
November 2, 2016: Microbial Pathogenesis
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