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https://www.readbyqxmd.com/read/28340408/ongoing-evolution-of-pseudomonas-aeruginosa-pao1-sublines-complicates-studies-of-dna-damage-repair-and-tolerance
#1
Julia Sidorenko, Tatjana Jatsenko, Maia Kivisaar
Sublines of the major P. aeruginosa reference strain PAO1 are derivatives of the original PAO1 isolate, which are maintained in laboratories worldwide. These sublines display substantial genomic and phenotypic variation due to ongoing microevolution. Here, we examined four sublines, MPAO1, PAO1-L, PAO1-DSM and PAO1-UT, originated from different laboratories, and six DNA polymerase-deficient mutants from the P. aeruginosa MPAO1 transposon library for their employment in elucidation of DNA damage repair and tolerance mechanisms in P...
March 16, 2017: Mutation Research
https://www.readbyqxmd.com/read/28339716/prevalence-antimicrobial-resistance-and-genetic-diversity-of-campylobacter-coli-and-campylobacter-jejuni-in-ecuadorian-broilers-at-slaughter-age
#2
Christian Vinueza-Burgos, Magali Wautier, Delphine Martiny, Marco Cisneros, Inge Van Damme, Lieven De Zutter
Thermotolerant Campylobacter spp. are a major cause of foodborne gastrointestinal infections worldwide. The linkage of human campylobacteriosis and poultry has been widely described. In this study we aimed to investigate the prevalence, antimicrobial resistance and genetic diversity of C. coli and C. jejuni in broilers from Ecuador. Caecal content from 379 randomly selected broiler batches originating from 115 farms were collected from 6 slaughterhouses located in the province of Pichincha during 1 year. Microbiological isolation was performed by direct plating on mCCDA agar...
February 21, 2017: Poultry Science
https://www.readbyqxmd.com/read/28339623/the-molecular-and-clinical-epidemiology-of-extended-spectrum-cephalosporin-and-carbapenem-resistant-enterobacteriaceae-at-4-us-pediatric-hospitals
#3
Danielle M Zerr, Scott J Weissman, Chuan Zhou, Matthew P Kronman, Amanda L Adler, Jessica E Berry, Jaipreet Rayar, Jeff Myers, Wren L Haaland, Carey-Ann D Burnham, Alexis Elward, Jason Newland, Rangaraj Selvarangan, Kaede V Sullivan, Theoklis Zaoutis, Xuan Qin
Objective.: In this report, we aim to describe the epidemiology of extended-spectrum cephalosporin-resistant (ESC-R) and carbapenem-resistant (CR) Enterobacteriaceae infections in children. Methods.: ESC-R and CR Enterobacteriaceae isolates from normally sterile sites of patients aged <22 years from 4 freestanding pediatric medical centers were collected along with the associated clinical data. Results.: The overall frequencies of ESC-R and CR isolates according to hospital over the 4-year study period ranged from 0...
January 19, 2017: Journal of the Pediatric Infectious Diseases Society
https://www.readbyqxmd.com/read/28337623/erratum-to-isotherm-kinetic-and-thermodynamic-study-of-ciprofloxacin-sorption-on-sediments
#4
Dragana Mutavdžić Pavlović, Lidija Ćurković, Ivana Grčić, Iva Šimić, Josip Župan
No abstract text is available yet for this article.
March 23, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28337489/antibiotic-resistance-profiling-and-microbiota-of-the-upper-respiratory-tract-of-apparently-healthy-dogs-in-ibadan-south-west-nigeria
#5
Oluwafemi Babatunde Daodu, Elizabeth Adesola Amosun, Daniel Oladimeji Oluwayelu
BACKGROUND: Rearing of dogs and other pets has become increasingly popular in modern society. Bacterial flora resides within the nasal and oral cavities of dogs and when chanced, can be pathogenic. Certain similarities between humans and dogs portends dangerous behavioral habits that could lead to zoonotic disease transmission. This study was aimed at isolation, identification and antibiotic profiling of bacteria from nasal swabs of apparently healthy dogs. The zoonotic risk was also considered...
2017: African Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28336136/antimicrobial-susceptibility-of-2906-pseudomonasaeruginosa-clinical-isolates-obtained-from-patients-in-canadian-hospitals-over-a-period-of-8-years-results-of-the-canadian-ward-surveillance-study-canward-2008-2015
#6
Andrew Walkty, Philippe Lagace-Wiens, Heather Adam, Melanie Baxter, James Karlowsky, Michael R Mulvey, Melissa McCracken, George G Zhanel
Pseudomonas aeruginosa is an important nosocomial pathogen. The purpose of this study was to evaluate the antimicrobial susceptibility profile of P. aeruginosa clinical isolates obtained from inpatients and outpatients at hospitals across Canada from January 2008 to December 2015 (CANWARD Study). Susceptibility testing was performed using broth microdilution, as described by the Clinical and Laboratory Standards Institute. In total, 2906 P. aeruginosa isolates were evaluated. The percentage of isolates susceptible to common antipseudomonal antimicrobials was: colistin 94...
January 2017: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/28334919/antibiotics-trigger-initiation-of-sccmec-transfer-by-inducing-sos-responses
#7
Pilong Liu, Zhaowei Wu, Huping Xue, Xin Zhao
The rise of antimicrobial resistance limits therapeutic options for infections by methicillin-resistant staphylococci. The staphylococcal cassette chromosome mec (SCCmec) is a mobile genetic element as the only carrier of the methicillin-resistance determinants, the mecA or mecC gene. The use of antibiotics increases the spread of antibiotic resistance, but the mechanism by which antibiotics promote horizontal dissemination of SCCmec is largely unknown. In this study, we demonstrate that many antibiotics, including β-lactams, can induce the expression of ccrC1 and SCCmec excision from the bacterial chromosome...
March 3, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28334502/development-of-a-dried-blood-spot-hplc-pda-method-for-the-analysis-of-linezolid-and-ciprofloxacin-in-hospital-acquired-pneumonia-patients
#8
Vincenzo Ferrone, Maura Carlucci, Roberto Cotellese, Paolo Raimondi, Annadomenica Cichella, Lorenzo Di Marco, Salvatore Genovese, Giuseppe Carlucci
This study developed a HPLC method involving dried blood spotting as sampling method for the therapeutic drug monitoring of the antimicrobial combination therapy with linezolid and ciprofloxacin. DBS for standards, quality control samples, and patient samples were excised and then extracted using a mixture of methanol/water/formic acid 80:20:0.1 (v/v/v), respectively. Linezolid (LZD) and ciprofloxacin (CPR) were measured by a high performance liquid chromatography using a Kinetex EVO C18 (100 x 4.6 mm I.D...
March 23, 2017: Drug Testing and Analysis
https://www.readbyqxmd.com/read/28333709/mycobacterium-fortuitum-bloodstream-infection-in-a-very-low-birth-weight-preterm-neonate
#9
Kate Hodgson, Sandra Isabel, Patrick McNamara, Astrid Petrich, Ari Bitnun
Mycobacterium fortuitum is a rapidly growing Mycobacterium species that is a rare cause of disease, primarily in immunocompromised patients. We present a preterm very low birth weight neonate who developed M. fortuitum bloodstream infection, where 16S rDNA sequencing allowed accurate identification. Cure was achieved by line removal and adjuvant combination treatment with amikacin, ciprofloxacin and clarithromycin.
March 22, 2017: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/28333677/y-site-physical-compatibility-of-beta-blocker-infusions-with-intensive-care-unit-admixtures
#10
Jaime A Foushee, Pmichaele Meredith, Laura M Fox, EdwardE Grace
Parenteral beta-blocker therapy via continuous infusion has shown promising results for improved outcomes for patients with septic shock. As patients with septic shock may require multiple intravenous medications, compatibility is necessary to co-infuse these medications through a y-site connector. The purpose of this study was to examine the physical compatibility of select intravenous drugs used for patients with septic shock combined with various intravenous beta-blockers including esmolol, labetalol, and metoprolol through a simulated y-site infusion...
July 2016: International Journal of Pharmaceutical Compounding
https://www.readbyqxmd.com/read/28333355/wgs-to-predict-antibiotic-mics-for-neisseria-gonorrhoeae
#11
David W Eyre, Dilrini De Silva, Kevin Cole, Joanna Peters, Michelle J Cole, Yonatan H Grad, Walter Demczuk, Irene Martin, Michael R Mulvey, Derrick W Crook, A Sarah Walker, Tim E A Peto, John Paul
Background: Tracking the spread of antimicrobial-resistant Neisseria gonorrhoeae is a major priority for national surveillance programmes. Objectives: We investigate whether WGS and simultaneous analysis of multiple resistance determinants can be used to predict antimicrobial susceptibilities to the level of MICs in N. gonorrhoeae. Methods: WGS was used to identify previously reported potential resistance determinants in 681 N. gonorrhoeae isolates, from England, the USA and Canada, with phenotypes for cefixime, penicillin, azithromycin, ciprofloxacin and tetracycline determined as part of national surveillance programmes...
March 10, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28333351/ecological-impact-of-ciprofloxacin-on-commensal-enterococci-in-healthy-volunteers
#12
Victoire de Lastours, Elena Maugy, Vincent Mathy, Françoise Chau, Benjamin Rossi, François Guérin, Vincent Cattoir, Bruno Fantin
Background: The ecological impact of ciprofloxacin on commensal enterococci is unknown. Methods: Forty-eight healthy volunteers received ciprofloxacin from day (D) 0 to D14; stools were collected on D7, D14 and D42. Fluoroquinolone-susceptible and -resistant enterococci (FQ-SE and FQ-RE) were detected and quantified by culture, and identified by MALDI-TOF MS. The relative abundance of FQ-RE over FQ-SE was determined. The genetic basis of fluoroquinolone resistance was deciphered by partial sequencing of gyrA and parC genes...
March 4, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28332345/high-incidence-of-virulence-factors-among-clinical-enterococcus-faecalis-isolates-in-southwestern-iran
#13
Hamid Heidari, Somayeh Hasanpour, Hadi Sedigh Ebrahim-Saraie, Mohammad Motamedifar
BACKGROUND: Over the past two decades, enterococci have emerged as an important agent responsible for hospital acquired infection. Several virulence factors contribute to the adherence, colonization, evasion of the host immune response, and pathogenicity and severity of the infection. Enterococcus faecalis is the most common and virulent species causing infections in hospitalized patients. The aim of the present study was to examine the prevalence of genes encoding virulence factors and antimicrobial resistance patterns of E...
March 13, 2017: Infection & Chemotherapy
https://www.readbyqxmd.com/read/28331866/clinical-response-and-outcome-in-patients-with-multidrug-resistant-gram-negative-infections
#14
Masoume Malekolkottab, Lida Shojaei, Hossein Khalili, Mahsa Doomanlou
OBJECTIVE: In this study, frequency and antimicrobial sensitivity pattern of multidrug resistant (MDR) microorganisms were evaluated in a referral teaching hospital in Iran. METHODS: Patients with MDR Gram-negative pathogens were followed during the course of hospitalization. Demographic data, baseline diseases, type of biological sample, isolated microorganism, type of infection, antibiotic regimen before the availability of the culture result and change in the antibiotic regimen following receiving the antibiogram results, response to the treatment regimen, and duration of hospitalization and patient's outcome were considered variables for each recruited patient...
January 2017: Journal of Research in Pharmacy Practice
https://www.readbyqxmd.com/read/28331641/penicillin-susceptible-oxidase-negative-nonhemolytic-nonmotile-bacillus-megaterium-in-disguise-of-bacillus-anthracis
#15
Shih Keng Loong, Boon Teong Teoh, Jefree Johari, Chee Sieng Khor, Juraina Abd-Jamil, Siti Sarah Nor'e, Nur Izyan Samsudin, Noor Syahida Azizan, Che Norainon Yaacob, Asma Anati CheMatSeri, Nur Hidayana Mahfodz, Sazaly AbuBakar
Bacillus anthracis is a bacterial pathogen of major concern. The spores of this bacteria can survive harsh environmental conditions for extended periods and are well recognized as a potential bioterror weapon with significant implications. Accurate and timely identification of this Bacillus species in the diagnostic laboratory is essential for disease and public health management. Biosafety Level 3 measures and ciprofloxacin treatment were instituted when B. anthracis was suspected from a patient with gangrenous foot...
2017: Case Reports in Infectious Diseases
https://www.readbyqxmd.com/read/28329128/quinolone-ear-drops-after-tympanostomy-tubes-and-the-risk-of-eardrum-perforation-a-retrospective-cohort-study
#16
Adel Alrwisan, Patrick J Antonelli, Almut G Winterstein
Background.: This study investigated whether quinolone ear drops, with or without corticosteroids, increase the risk of perforation requiring tympanoplasty following tympanostomy tube (TT) placement in children. Methods.: This was a retrospective cohort study using Medicaid encounter and pharmacy billing data from 29 US states between 1999 and 2006. Children <18 years old without predisposing factors for perforation during a 6-month look-back period entered the cohort after TT placement and first dispensing of antibiotic ear drops...
February 27, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28328967/phenotypic-and-molecular-characterization-of-antimicrobial-resistance-in-enterobacter-spp-isolates-from-companion-animals-in-japan
#17
Kazuki Harada, Takae Shimizu, Yujiro Mukai, Ken Kuwajima, Tomomi Sato, Akari Kajino, Masaru Usui, Yutaka Tamura, Yui Kimura, Tadashi Miyamoto, Yuzo Tsuyuki, Asami Ohki, Yasushi Kataoka
The emergence of antimicrobial resistance among Enterobacter spp., including resistance to extended-spectrum cephalosporins (ESC), is of great concern in both human and veterinary medicine. In this study, we investigated the prevalence of antimicrobial resistance among 60 isolates of Enterobacter spp., including E. cloacae (n = 44), E. aerogenes (n = 10), and E. asburiae (n = 6), from clinical specimens of dogs and cats from 15 prefectures in Japan. Furthermore, we characterized the resistance mechanisms harbored by these isolates, including extended-spectrum β-lactamases (ESBLs) and plasmid-mediated quinolone resistance (PMQR); and assessed the genetic relatedness of ESC-resistant Enterobacter spp...
2017: PloS One
https://www.readbyqxmd.com/read/28328947/a-spontaneous-mutation-in-kdsd-a-biosynthesis-gene-for-3-deoxy-d-manno-octulosonic-acid-occurred-in-a-ciprofloxacin-resistant-strain-of-francisella-tularensis-and-caused-a-high-level-of-attenuation-in-murine-models-of-tularemia
#18
Taylor Chance, Jennifer Chua, Ronald G Toothman, Jason T Ladner, Jonathan E Nuss, Jo Lynne Raymond, Fabrice V Biot, Samandra Demons, Lynda Miller, Stephanie Halasohoris, Sherry Mou, Galina Koroleva, Sean Lovett, Gustavo Palacios, Nicholas J Vietri, Patricia L Worsham, Christopher K Cote, Todd M Kijek, Joel A Bozue
Francisella tularensis, a gram-negative facultative intracellular bacterial pathogen, is the causative agent of tularemia and able to infect many mammalian species, including humans. Because of its ability to cause a lethal infection, low infectious dose, and aerosolizable nature, F. tularensis subspecies tularensis is considered a potential biowarfare agent. Due to its in vitro efficacy, ciprofloxacin is one of the antibiotics recommended for post-exposure prophylaxis of tularemia. In order to identify therapeutics that will be efficacious against infections caused by drug resistant select-agents and to better understand the threat, we sought to characterize an existing ciprofloxacin resistant (CipR) mutant in the Schu S4 strain of F...
2017: PloS One
https://www.readbyqxmd.com/read/28328294/microbiological-characteristics-and-clinical-outcomes-of-acinetobacter-spp-endophthalmitis-with-the-first-reported-case-of-acinetobacter-haemolyticus-endophthalmitis
#19
Mahima Jhingan, Divya Balakrishnan, Padmaja Kumari Rani, Mudit Tyagi, Joveeta Joseph
AIM: To present the microbiological details and clinical outcomes of Acinetobacter spp. endophthalmitis with the first reported case of A. haemolyticus. METHODS: A retrospective study of microbiologically proven Acinetobacter spp. endophthalmitis was carried out from 2010 to 2015. The data collected included age, type of endophthalmitis, best-corrected visual acuity (BCVA), species involved, and antibiotic susceptibility pattern. The primary outcomes measured were anatomical outcomes in terms of globe integrity and functional outcome as BCVA at last follow-up...
March 22, 2017: Seminars in Ophthalmology
https://www.readbyqxmd.com/read/28327156/mycobacterium-goodii-endocarditis-following-mitral-valve-ring-annuloplasty
#20
Rohan B Parikh, Matthew Grant
BACKGROUND: Mycobacterium goodii is an infrequent human pathogen which has been implicated in prosthesis related infections and penetrating injuries. It is often initially misidentified as a gram-positive rod by clinical microbiologic laboratories and should be considered in the differential diagnosis. CASE PRESENTATION: We describe here the second reported case of M. goodii endocarditis. Species level identification was performed by 16S rDNA (ribosomal deoxyribonucleic acid) gene sequencing...
March 21, 2017: Annals of Clinical Microbiology and Antimicrobials
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