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https://www.readbyqxmd.com/read/28430811/antimicrobial-resistance-in-coagulase-positive-staphylococci-isolated-from-companion-animals-in-australia-a-one-year-study
#1
Sugiyono Saputra, David Jordan, Kate A Worthing, Jacqueline M Norris, Hui S Wong, Rebecca Abraham, Darren J Trott, Sam Abraham
Methicillin-resistant coagulase-positive staphylococci (CoPS) have become increasingly recognised as opportunistic pathogens that limit therapeutic options in companion animals. The frequency of methicillin resistance amongst clinical isolates on an Australia-wide level is unknown. This study determined antimicrobial susceptibility patterns for CoPS isolated from clinical infections in companion animals (dogs, cats and horses) as part of the first nation-wide survey on antimicrobial resistance in animal pathogens in Australia for a one-year period (January 2013 to January 2014)...
2017: PloS One
https://www.readbyqxmd.com/read/28421046/horses-in-denmark-are-a-reservoir-of-diverse-clones-of-methicillin-resistant-and-susceptible-staphylococcus-aureus
#2
Md Zohorul Islam, Carmen Espinosa-Gongora, Peter Damborg, Raphael N Sieber, Rikke Munk, Louise Husted, Arshnee Moodley, Robert Skov, Jesper Larsen, Luca Guardabassi
Denmark is a country with high prevalence of livestock-associated methicillin-resistant Staphylococcus aureus (MRSA) clonal complex (CC) 398 in pigs. Even though pig farming is regarded as the main source of human infection or colonization with MRSA CC398, 10-15% of the human cases appear not to be linked to pigs. Following the recent reports of MRSA CC398 in horses in other European countries and the lack of knowledge on S. aureus carriage in this animal species, we carried out a study to investigate whether horses constitute a reservoir of MRSA CC398 in Denmark, and to gain knowledge on the frequency and genetic diversity of S...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28418253/species-level-discrimination-of-psychrotrophic-pathogenic-and-spoilage-gram-negative-raw-milk-isolates-using-a-combined-maldi-tof-ms-proteomics-bioinformatics-based-approach
#3
Nuwan R Vithanage, Thomas Richard Yeager, Jeevana Bhongir, Snehal R Jadhav, Chaminda Senaka Ranadheera, Enzo A Palombo, Nivedita Datta
Identification of psychrotrophic pathogenic and spoilage Gram-negative bacteria using rapid and reliable techniques is important in commercial milk processing, as these bacteria can produce heat-resistant proteases and act as post-processing contaminants in pasteurised milk. Matrix-assisted laser desorption/ionization-time of flight mass spectrometry (MALDI-TOF MS) is a proven technology for identification of bacteria in food, however may require optimisation for identification of pathogenic and spoilage bacteria in milk and dairy products...
April 18, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/28414107/antimicrobial-susceptibility-of-bacteroides-fragilis-group-organisms-in-hong-kong-by-the-tentative-eucast-disc-diffusion-method
#4
Pak-Leung Ho, Chong-Yee Yau, Lok-Yan Ho, Eileen Ling-Yi Lai, Melissa Chun-Jiao Liu, Cindy Wing-Sze Tse, Kin-Hung Chow
This study used a recently developed EUCAST disc diffusion method to measure the susceptibility of 741 B. fragilis group isolates to six antibiotics. Isolates nonsusceptible to imipenem and metronidazole by the disc method were further investigated by E-test. Species identification was obtained by matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF MS), PCR assays and 16S rRNA sequencing. The most common species were B. fragilis (n = 424, including 81 division II and 343 division I isolates), B...
April 14, 2017: Anaerobe
https://www.readbyqxmd.com/read/28408060/bacterial-epidemiology-and-antimicrobial-resistance-profiles-of-urinary-specimens-of-the-elderly
#5
F Gravey, G Loggia, A de La Blanchardière, V Cattoir
OBJECTIVE: Although urinary tract infections are the second leading cause of infections among patients aged above 65 years, data on bacterial epidemiology of urinary specimens in these patients is scarce. Our aim was to describe the main bacterial species found at significant levels in urine specimens of the elderly and to determine their antimicrobial resistance profiles. METHODS: From October 2012 to October 2015, all urinary specimens (catheter-related or not) received at the laboratory of microbiology of the university hospital of Caen (France) were retrospectively studied...
April 10, 2017: Médecine et Maladies Infectieuses
https://www.readbyqxmd.com/read/28404678/antifungal-susceptibility-testing-of-aspergillus-spp-by-using-a-cci-based-maldi-tof-ms-method-appears-to-not-offer-benefit-over-the-traditional-broth-microdilution-testing
#6
Melissa R Gitman, Lisa McTaggart, Joanna Spinato, Rahgavi Poopalarajah, Erin Lister, Shahid Husain, Julianne V Kus
Aspergillus spp. cause serious invasive lung infections and Aspergillus fumigatus is the most commonly encountered clinically significant species. Voriconazole is considered to be the drug of choice for A. fumigatus infections, however rising resistance rates have been reported. We evaluated a MALDI-ToF MS-based method for the differentiation between wild type and non-wild type isolates of 20 Aspergillus spp. (including 3 isolates 2 A. ustus, and 1 A. calidoustus that were used as controls due their intrinsic low azole susceptibility with respect to the in vitro response to voriconazole)...
April 12, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28400760/aeromonas-diversity-and-antimicrobial-susceptibility-in-freshwater-an-attempt-to-set-generic-epidemiological-cut-off-values
#7
Sandrine Baron, Sophie A Granier, Emeline Larvor, Eric Jouy, Maelan Cineux, Amandine Wilhelm, Benoit Gassilloud, Sophie Le Bouquin, Isabelle Kempf, Claire Chauvin
The importance of the role of environment in the dissemination of antimicrobial resistant bacteria is now well recognized. Thus, bacterial indicators to monitor the phenomena are required. The Aeromonas genus is autochthonous in the aquatic environment and easy to detect in any water type, such as freshwater, or wastewater. These microorganisms are also causing infections in humans and animals (including fish). Furthermore, as Aeromonas spp. is able to acquire antimicrobial resistance mechanisms, it is candidate for indicator bacteria to follow antimicrobial resistance dissemination in aquatic environments...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28384185/evaluation-of-a-modified-meropenem-hydrolysis-assay-on-a-large-cohort-of-kpc-and-vim-carbapenemase-producing-enterobacteriaceae
#8
Adriana Calderaro, Mirko Buttrini, Maddalena Piergianni, Sara Montecchini, Monica Martinelli, Silvia Covan, Giovanna Piccolo, Maria Cristina Medici, Maria Cristina Arcangeletti, Carlo Chezzi, Flora De Conto
Carbapenem-resistant Enterobacteriaceae (CRE) have spread globally and represent a serious and growing threat to public health. The introduction of rapid and sensitive methods for the detection of carbapenemase-producing bacteria is of increasing importance. The carbapenemase production can be detected using non-molecular methods (such as the modified Hodge test, the synergy test, the Carba NP test and the antibiotic hydrolysis assays) and DNA-based methods. In this study, we propose a modified version of a previously described meropenem hydrolysis assay (MHA) by MALDI-TOF MS for the phenotypic detection in 2h of carbapenemase-producing Enterobacteriaceae...
2017: PloS One
https://www.readbyqxmd.com/read/28378299/activity-guided-separation-and-characterization-of-new-halocin-ha3-from-fermented-broth-of-haloferax-larsenii-ha3
#9
Vijay Kumar, Santosh Kumar Tiwari
Haloferax larsenii HA3 was able to grow optimally in HS medium containing 15% NaCl, at pH 7.2 and 42 °C in aerobic conditions. Strain HA3 was found to be round shape, Gram-negative, catalase-positive, sensitive to bile acid, and resistant to chloramphenicol, and could not utilize arginine. The lipid profile revealed the presence of glycerol diether moiety (GDEM) suggesting Haloarchaea characteristics. Phylogenetic analysis based on 16S rRNA gene sequence similarities showed that it was closely related to H...
April 4, 2017: Extremophiles: Life Under Extreme Conditions
https://www.readbyqxmd.com/read/28365884/de-escalating-antibiotic-use-in-the-inpatient-setting-strategies-controversies-and-challenges
#10
REVIEW
J Daniel Markley, Shaina Bernard, Gonzalo Bearman, Michael P Stevens
PURPOSE OF REVIEW: Antibiotic de-escalation (ADE) is widely accepted as an integral strategy to curtail the global antibiotic resistance crisis. However, there is significant uncertainty regarding the ideal ADE strategy and its true impact on antibiotic resistance. Rapid diagnostic testing has the potential to enhance ADE strategies. Herein, we aim to discuss the current strategies, controversies, and challenges of ADE in the inpatient setting. RECENT FINDINGS: A consensus definition of ADE remains elusive at this time...
April 2017: Current Infectious Disease Reports
https://www.readbyqxmd.com/read/28364558/changing-epidemiology-of-candidaemia-in-australia
#11
Belinda Chapman, Monica Slavin, Debbie Marriott, Catriona Halliday, Sarah Kidd, Ian Arthur, Narin Bak, Christopher H Heath, Karina Kennedy, C Orla Morrissey, Tania C Sorrell, Sebastian van Hal, Caitlin Keighley, Emma Goeman, Neil Underwood, Krispin Hajkowicz, Ann Hofmeyr, Michael Leung, Nenad Macesic, Jeannie Botes, Christopher Blyth, Louise Cooley, C Robert George, Pankaja Kalukottege, Alison Kesson, Brendan McMullan, Robert Baird, Jennifer Robson, Tony M Korman, Stella Pendle, Kerry Weeks, Eunice Liu, Elaine Cheong, Sharon Chen
Objectives: Knowledge of contemporary epidemiology of candidaemia is essential. We aimed to identify changes since 2004 in incidence, species epidemiology and antifungal susceptibilities of Candida spp. causing candidaemia in Australia. Methods: These data were collected from nationwide active laboratory-based surveillance for candidaemia over 1 year (within 2014-2015). Isolate identification was by MALDI-TOF MS supplemented by DNA sequencing. Antifungal susceptibility testing was performed using Sensititre YeastOne™...
April 1, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28360188/rapid-detection-of-cfia-metallo-%C3%AE-lactamase-producing-bacteroides-fragilis-by-the-combination-of-maldi-tof-ms-and-carbanp
#12
Pak-Leung Ho, Chong-Yee Yau, Lok-Yan Ho, Jonathan H K Chen, Eileen L Y Lai, Stephanie W U Lo, Cindy W S Tse, Kin-Hung Chow
AIMS: Carbapenem resistance in Bacteroides fragilis is emerging and is mainly attributed to insertion sequence (IS)-mediated activation of the carbapenemase gene cfiA. We investigated the use of matrix-assisted laser desorption ionisation time-of-flight mass spectrometry (MALDI-TOF MS) and the CarbaNP assay for the rapid identification of these strains. METHODS: This study used the Bruker MALDI Biotype system and the mass spectra models generated by 20 B. fragilis reference strains (10 cfiA-positive and 10 cfiA-negative) in the ClinProTools software to identify 404 B...
March 30, 2017: Journal of Clinical Pathology
https://www.readbyqxmd.com/read/28342095/-advances-in-diagnostic-microbiology-opportunities-and-limitations
#13
F P Maurer, M Hentschke, H Rohde
In the light of ever increasing problems related to the emergence of multidrug-resistant bacteria, rapid microbiological diagnostics are of growing importance. Timely pathogen detection and availability of susceptibility data are essential for optimal treatment, but are even more crucial for de-escalation of broad spectrum empiric therapies. Medical microbiology is, thus, an integral part of antimicrobial stewardship programs. Traditional microbiological techniques for species identification and susceptibility testing rely on bacterial growth and are, thus, characterized by inherent slowness...
March 24, 2017: Medizinische Klinik, Intensivmedizin und Notfallmedizin
https://www.readbyqxmd.com/read/28333351/ecological-impact-of-ciprofloxacin-on-commensal-enterococci-in-healthy-volunteers
#14
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/28316631/potential-impact-of-rapid-blood-culture-testing-for-gram-positive-bacteremia-in-japan-with-the-verigene-gram-positive-blood-culture-test
#15
Ken Kikuchi, Mari Matsuda, Shigekazu Iguchi, Tomonori Mizutani, Keiichi Hiramatsu, Michiru Tega-Ishii, Kaori Sansaka, Kenta Negishi, Kimie Shimada, Jun Umemura, Shigeyuki Notake, Hideji Yanagisawa, Hiroshi Takahashi, Reiko Yabusaki, Hideki Araoka, Akiko Yoneyama
Background. Early detection of Gram-positive bacteremia and timely appropriate antimicrobial therapy are required for decreasing patient mortality. The purpose of our study was to evaluate the performance of the Verigene Gram-positive blood culture assay (BC-GP) in two special healthcare settings and determine the potential impact of rapid blood culture testing for Gram-positive bacteremia within the Japanese healthcare delivery system. Furthermore, the study included simulated blood cultures, which included a library of well-characterized methicillin-resistant Staphylococcus aureus (MRSA) and vancomycin-resistant enterococci (VRE) isolates reflecting different geographical regions in Japan...
2017: Canadian Journal of Infectious Diseases & Medical Microbiology
https://www.readbyqxmd.com/read/28306235/gas-cluster-ion-beam-time-of-flight-secondary-ion-mass-spectrometry-high-resolution-imaging-of-cardiolipin-speciation-in-the-brain-identification-of-molecular-losses-after-traumatic-injury
#16
Hua Tian, Louis J Sparvero, Andrew A Amoscato, Anna Bloom, Hülya Bayır, Valerian E Kagan, Nicholas Winograd
Gas cluster ion beam-secondary ion mass spectrometry (GCIB-SIMS) has shown the full potential of mapping intact lipids in biological systems with better than 10 μm lateral resolution. This study investigated further the capability of GCIB-SIMS in imaging high-mass signals from intact cardiolipin (CL) and gangliosides in normal brain and the effect of a controlled cortical impact model (CCI) of traumatic brain injury (TBI) on their distribution. A combination of enzymatic and chemical treatments was employed to suppress the signals from the most abundant phospholipids (phosphatidylcholine (PC) and phosphatidylethanolamine (PE)) and enhance the signals from the low-abundance CLs and gangliosides to allow their GCIB-SIMS detection at 8 and 16 μm spatial resolution...
March 29, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28294933/differences-in-sheep-and-goats-milk-microbiological-profile-between-conventional-and-organic-farming-systems-in-greece
#17
Eleni Malissiova, Theofilos Papadopoulos, Aikaterini Kyriazi, Maria Mparda, Christina Sakorafa, Antonios Katsioulis, Anna Katsiaflaka, Maria Kyritsi, Antonios Zdragas, Christos Hadjichristodoulou
The aim of this study was to examine differences in the microbiological profile and antimicrobial resistance of bacteria isolated from milk from organic and conventional sheep and goat farms. Twenty-five organic and 25 conventional sheep and goat farms in the region of Thessaly, Greece participated in this study. A standardised detailed questionnaire was used to describe farming practices. A total of 50 samples were collected and analysed for total viable count (TVC), total coliform count (TCC) and somatic cell count (SCC), while Staphylococcus aureus and Escherichia coli were isolated using standard methods...
March 15, 2017: Journal of Dairy Research
https://www.readbyqxmd.com/read/28284599/the-oral-microbiota-of-domestic-cats-harbors-a-wide-variety-of-staphylococcus-species-with-zoonotic-potential
#18
Ciro César Rossi, Ingrid da Silva Dias, Igor Mansur Muniz, Walter Lilenbaum, Marcia Giambiagi-deMarval
This study aimed to characterize the species, antimicrobial resistance and dispersion of CRISPR systems in staphylococci isolated from the oropharynx of domestic cats in Brazil. Staphylococcus strains (n=75) were identified by MALDI-TOF and sequencing of rpoB and tuf genes. Antimicrobial susceptibility was assessed by disk diffusion method and PCR to investigate the presence of antimicrobial-resistance genes usually present in mobile genetic elements (plasmids), in addition to plasmid extraction. CRISPR - genetic arrangements that give the bacteria the ability to resist the entry of exogenous DNA - were investigated by the presence of the essential protein Cas1 gene...
March 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28283012/-evaluation-of-mascia-brunelli-rapid-antigen-test-in-the-diagnosis-of-group-a-streptococcal-pharyngitis
#19
Ayşe Barış, Nur Anlıaçık, Mehmet Emin Bulut, Rıdvan Deniz, Elif Yücel, Elif Aktaş
Pharyngitis in most cases is due to viral microorganisms however drug therapy without the detection of etiological agent leads to unnecessary use of antibiotics. On the other hand, when the etiologic agent is group A beta-hemolytic streptococci (GAS) it is important to identify the etiologic agent rapidly which will guide the treatment with appropriate antibiotics. The use of highly sensitive rapid tests will contribute significantly to early diagnosis and appropriate therapy. The aim of this study is to evaluate the efficacy of Mascia Brunelli rapid antigen test for the detection of GAS in throat swab samples...
January 2017: Mikrobiyoloji Bülteni
https://www.readbyqxmd.com/read/28283005/-comparison-of-maldi-tof-and-16s-rrna-methods-in-identification-of-viridans-group-streptococci
#20
Serap Süzük Yıldız, Banu Kaşkatepe, Salih Altınok, Mustafa Çetin, Alper Karagöz, Sümeyra Savaş
Accurate identification of viridans group streptococci (VGS) frequently encountered as a causative agent of infective endocarditis is always a challenge for the clinical microbiology laboratory. Clinical microbiology laboratories generally use semi automatic/full automatic systems, molecular methods and also conventional methods for the identification of these bacteria. There are recent published studies that have used MALDI-TOF (Matrix Assisted Laser Ionization Mass Spectrometry-Time of Flight) systems in the identification of VGS...
January 2017: Mikrobiyoloji Bülteni
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