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Wyszukujesz frazę "E. coli strains" wg kryterium: Wszystkie pola


Wyświetlanie 1-5 z 5
Tytuł:
Using multitype branching models to analyze bacterial pathogenicity
Autorzy:
Tahir, Daniah
Kaj, Ingemar
Bartoszek, Krzysztof
Majchrzak, Marta
Parniewski, Pawel
Sakowski, Sebastian
Powiązania:
https://bibliotekanauki.pl/articles/747904.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
Markov models
branching processes
limit theorems
virulence factors
E. coli strains
Opis:
We apply multitype, continuous time, Markov branching models to study pathogenicity in E. coli, a bacterium belonging to the genus Escherichia. First, we examine briefly, the properties of multitype branching processes and we also survey some fundamental limit theorems regarding the behavior of such models under various conditions. These theorems are then applied to discrete, state dependent models, in order to analyze pathogenicity in a published clinical data set consisting of 251 strains of E. coli. We use well established methods, incorporating maximum likelihood techniques, to estimate speciation rates as well as the rates of transition between different states of the models. From the analysis, we not only derive new results, but we also verify some preexisting notions about virulent behavior in bacterial strains.
Źródło:
Mathematica Applicanda; 2020, 48
1730-2668
2299-4009
Pojawia się w:
Mathematica Applicanda
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Studies on biosynthesis of silver nanoparticles using Rhizopus sp. and its antibacterial efficacy on E. coli MDR strains
Autorzy:
Hiremath, J.
Rathod, V.
Ninganagouda, S.
Singh, D.
Prema, K.
Powiązania:
https://bibliotekanauki.pl/articles/11479.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
biosynthesis
silver nanoparticle
Rhizopus
antibacterial activity
Escherichia coli
multidrug resistance
nanotechnology
Opis:
Nanotechnology is a field that is burgeoning day by day, making an impact in all spheres of human life. Biological methods of synthesis have paved way for the “greener synthesis” of nanoparticles and these have proven to be better methods due to slower kinetics, they offer better manipulation and control over crystal growth and their stabilization. In this context we have investigated extracellular biosynthesis of silver nanoparticles (AgNPs) using cell-free extract of Rhizopus spp.. Formation of AgNPs was indicated by the change in the colour of the cellfree extract from yellow to dark brown under static condition after 48 hrs of incubation. Characterization of AgNPs was carried out by UV-Vis Spectroscopy which gave sharp plasmon resonance peak at 429 nm corresponding to spherical shaped nanoparticles. Transmission electron microscopy (TEM) micrograph showed formation of well-dispersed AgNPs in the range of 25-50 nm. Scanning electron microscopy (SEM) showed the particles to be uniformly dispersed without agglomeration with smooth morphology. EDS showed the presence of elemental silver at 3kev. X-ray diffraction (XRD)-spectrum of the AgNPs exhibited 2θ¸ values corresponding to nanocrystal. These biosynthesized AgNPs were used to study their antimicrobial activity against Multi-drug resistant (MDR) E. coli strains, by Agar diffusion method. Zone of inhibition was measured. Synthesis of nanosized particles with antibacterial properties, which are called "nanoantibiotics", is of great interest in the development of new pharmaceutical products.
Źródło:
International Letters of Natural Sciences; 2014, 18
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania nad występowaniem ciepłochwiejnej enterotoksyny wśród szczepów E. coli odpowiedzialnych za zakażenia przewodu pokarmowego
Issledovanie prisutstvija termoljabil'nogo ehnterotoksina sredi shtammov E. coli otvetstvennykh za zarazhenija pishhevaritel'nogo trakta
Studies on the occurrence of thermolabile enterotoxin in E. coli strains causing gastrointestinal infections
Autorzy:
Dzierżanowska, D.
Simm, M.
Powiązania:
https://bibliotekanauki.pl/articles/2187818.pdf
Data publikacji:
1987
Wydawca:
Polskie Towarzystwo Diagnostyki Laboratoryjnej
Źródło:
Diagnostyka Laboratoryjna; 1987, 23, 4; 240-245
0867-4043
Pojawia się w:
Diagnostyka Laboratoryjna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
COMPARATIVE IN VITRO STUDIES OF FURAZIDIN AND NITROFURANTOIN ACTIVITIES AGAINST COMMON UROPATHOGENS INCLUDING MULTIDRUG-RESISTANT STRAINS OF E. COLI AND S. AUREUS
Autorzy:
Klesiewicz, Karolina
Karczewska, Elżbieta
Nowak, Paweł
Mrowiec, Paulina M.
Skiba-Kurek, Iwona
Białecka, Joanna
Majka, Zbigniew
Berdzik-Kalarus, Sylwia
Budak, Alicja
Zajdel, Paweł
Powiązania:
https://bibliotekanauki.pl/articles/895689.pdf
Data publikacji:
2018-06-30
Wydawca:
Polskie Towarzystwo Farmaceutyczne
Tematy:
ESBL-positive E. coli
MRSA
furazidin
nitrofurantoin
urinary tract infections
Opis:
Abstract: Urinary tract infections caused by wide range of pathogens including gram-negative and gram-positive bacteria as well as fungi are a severe public health problem. The predominant causative agent of both uncomplicated and complicated urinary tract infections is Escherichia coli. In an era of increasing bacterial resistance to antimicrobial agents and a high prevalence of multidrug-resistant (MDR) strains in community and hospital acquired infections, the re-evaluation of older generations of antimicrobial agents, such as nitrofuran derivatives, seems to be a reasonable approach. The aim of the study was to evaluate furazidin activity against common uropathogens in comparison to nitrofurantoin and other selected antimicrobial agents, routinely used in the treatment of urinary tract infections. Furazidin exhibited lower MICs than nitrofurantoin when tested against gram-negative and gram-positive bacteria including clinical MDR E. coli and methicillin-resistant Staphylococcus aureus. The MICs for furazidin ranged from 4 to 64 mg/L for Enterobacteriaceae strains, from 2 to 4 mg/L for gram-positive cocci, and 0.5 mg/L for anaerobic bacteria. The MICs for nitrofurantoin ranged from 16 to 64 mg/L for Enterobacteriaceae strains, from 8 to 64 mg/L for gram-positive cocci, and 4 mg/L for anaerobic bacteria. In addition, both nitrofurans displayed better activity against the tested bacterial strains than ciprofloxacin, fosfomycin, trimethoprim and co-trimoxazole. Nitrofuran derivatives displayed higher antimicrobial activity than other antimicrobial agents regardless of bacteria species or resistance mechanism.
Źródło:
Acta Poloniae Pharmaceutica - Drug Research; 2018, 75, 3
0001-6837
2353-5288
Pojawia się w:
Acta Poloniae Pharmaceutica - Drug Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Charakterystyka szczepów Campylobacter jejuni/coli, izolowanych od dzieci z zakażeniami przewodu pokarmowego
Kharakteristika shtammov Compylobacter jejuni/coli izolirovannykh ot detejj s zarazhenijami pishhevaritelnogo trakta
Characteristics of Campylobacter jeuni/coli strains isolated from children with gastrointestional infections
Autorzy:
Dzierżanowska, D.
Rożynek, E.
Wasielewska, E.
Orłowski, L.
Powiązania:
https://bibliotekanauki.pl/articles/2187817.pdf
Data publikacji:
1987
Wydawca:
Polskie Towarzystwo Diagnostyki Laboratoryjnej
Źródło:
Diagnostyka Laboratoryjna; 1987, 23, 4; 246-252
0867-4043
Pojawia się w:
Diagnostyka Laboratoryjna
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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