scholarly journals Biomass, abundance and sensitivity to antibiotics and antimycotics of the fungi in the Vistula River with its main tributaries

2013 ◽  
Vol 48 (2) ◽  
pp. 237-245 ◽  
Author(s):  
Anna Pietryczuk ◽  
Andrzej S. Górniak ◽  
Adam Więcko ◽  
Adam Cudowski
Keyword(s):  
Drug Resistance ◽  
River Water ◽  
Horizontal Transfer ◽  
Aquatic Ecosystems ◽  
Aquatic Fungi ◽  
Acquire Immunity ◽  
Vistula River ◽  
Amphotericine B ◽  
Amphotéricine B

Mycoplankton of Vistula River and its main tributaries biomass as well as the number and morphotype diversity was studied in summer and autumn 2011. Summer mycoplankton biomass was within the range of 0.2 – 0.5 μg/l, while in the autumn it was two times wider range (0.1 – 1.3μg/l). The number of fungi in river water most often did not exceed 1000 – 2000 CFU/ml. Fungi colonies isolated from rivers water were sensitive to the commonly used amphotericine B (10 μg) and gentamicin (10 μg). It seems to be plausible that aquatic fungi can acquire immunity to drugs as a result of horizontal transfer of a gene responsible for drug resistance or as an effect of antibiotics and antimycotics getting into the aquatic ecosystems from wastewaters.

Mucormycose naso-orbito-cérébrale traitée par amphotéricine B puis kétoconazole

1984 ◽  
Vol 14 (11) ◽  
pp. 610-611 ◽  
Author(s):  
Th. May ◽  
J.L. Schmit ◽  
A. Gerard ◽  
J.M. Vignaud ◽  
P. Tisserand ◽  
...  
Keyword(s):  
Amphotericine B ◽  
Amphotéricine B

scholarly journals New and rare species of Volvocaceae (Chlorophyta) in the Polish phycoflora

2013 ◽  
Vol 82 (4) ◽  
pp. 259-266 ◽  
Author(s):  
Ewa A. Dembowska
Keyword(s):  
Rare Species ◽  
Light Microscope ◽  
Aquatic Ecosystems ◽  
Oxbow Lakes ◽  
Vistula River ◽  
Photographic Documentation ◽  
Pandorina Morum ◽  
1960S And 1970S ◽  
The 1960S ◽  
First Time

Seven species of Volvocaceae were recorded in the lower Vistula River and its oxbow lakes, including <em>Pleodorina californica</em> for the first time in Poland. Three species – <em>Eudorina cylindrica</em>, <em>E. illinoisensis</em> and <em>E. unicocca</em> – were found in the Polish Vistula River in the 1960s and 1970s, as well as at present. They are rare species in the Polish aquatic ecosystems. Three species are common both in the oxbow lakes and in the Vistula River: <em>Eudorina elegans</em>, <em>Pandorina morum</em> and <em>Volvox aureus</em>. New and rare Volvocaceae species were described in terms of morphology and ecology; also photographic documentation (light microscope microphotographs) was completed.

scholarly journals Large scale changes in host methylation patterns induced by IncA/C plasmid transformation inVibrio cholerae

2018 ◽  
Author(s):  
Ruibai Wang ◽  
Kanglin Wan
Keyword(s):  
Drug Resistance ◽  
Host Range ◽  
Vibrio Cholerae ◽  
Horizontal Transfer ◽  
Large Scale ◽  
Epigenetic Modification ◽  
Bacterial Species ◽  
Multi Drug Resistance ◽  
Broad Host Range ◽  
Methylation Patterns

AbstractDNA methylation is a central epigenetic modification and has diverse biological functions in eukaryotic and prokaryotic organisms alike. The IncA/C plasmid genomes are approximately 150kb in length and harbour three methylase genes, two of which demonstrate cytosine specificity. Transformation of theVibrio choleraestrain C6706 with the IncA/C plasmid pVC211 resulted in a significant relabelling of the methylation patterns on the host chromosomes. The new methylation patterns induced by transformation with IncA/C plasmid were accepted by the restriction enzymes of the host’s restriction modification (RM) system. These data uncover a novel mechanism by which plasmids can be compatible with a host’s RM system and suggest a possible reason that plasmids of the IncA/C family are broad-host-range.Author summaryAntibiotic resistance of bacteria is a growing serious problem worldwidely and the horizontal transfer of multi-drug resistance genes mediated by plasmids within and between species of bacteria is the main reason. In the researches of multi-drug resistance ofVibrio cholerae, I have isolated several IncA/C plasmids. What impressed me most is their ability to accumulate the resistant genes. Moreover, they can transfer with high frequency and are stable in several bacterial species. There are at least three Tra regions on the IncA/C plasmid which containing components of the Type 4 Secretion System and are important for conjugative transfer of plasmids. So the horizontal transfer ability of IncA/C plasmids is reasonable. There are three methylase genes on the small genome of IncA/C plasmids, which demonstrate cytosine specificity and are seldom in bacteria. Their modification target and roles are interesting. Here, we analysed the methylation profiles of the hostV. choeraeinduced by the plasmid pVC211 and found that they were completely changed. In addition to replicons, this may be a novel mechanism that plasmid cross the barrier of the host’s RM system and become broad-host range. Changing the activity of methylase in IncA/C plasmids may be a new way to affect the stability of IncA/C plasmids to eliminate these multidrug-resistant plasmids from bacteria.

scholarly journals Basic Parameters of the Thermal Regime of Rivers in the Vistula River Catchment

2010 ◽  
Vol 14 (1) ◽  
pp. 185-192 ◽  
Author(s):  
Monika Oksiuta
Keyword(s):  
Water Temperature ◽  
River Water ◽  
Thermal Regime ◽  
Measurement Data ◽  
Natural Variability ◽  
Stream Network ◽  
River Catchment ◽  
Vistula River ◽  
Basic Parameters ◽  
River Water Temperature

Abstract Seasonal and multi-annual variability of river water temperature has been analysed based on data from 24 gauge stations of the IMGW network. It has been characterised by means of several values of the thermal regime parameters: mean annual, semi-annual (November-April, May-October) and amplitude. The variability of water temperature in the catchment and in the stream network has been estimated. Measurement data included seven stations at the Vistula river. On the background of natural variability, rivers or their segments have been distinguished where water temperature is impacted by anthropopressure.

scholarly journals Remoción de fosfato de ambientes acuáticos utilizando nanopartículas modificadas de Fe-Co/Quitosan

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Tadeh Issaian ◽  
Julia Costanza Relles Cuellar
Keyword(s):  
River Water ◽  
Aquatic Ecosystems ◽  
Environmentally Friendly ◽  
Cobalt Nanoparticles ◽  
Phosphate Concentration ◽  
Adsorption Rate ◽  
Synthetic Wastewater ◽  
Phosphate Adsorption ◽  
Jordan River ◽  
Iron Cobalt

Chitosan modified iron-cobalt nanoparticles (CMNPs) were used for phosphate adsorption in synthetic wastewater and river water from the Jordan river in Tunja, Boyacá, Colombia. Phosphate adsorption by CMNPs reached 52.7% in synthetic wastewater and 58.7% in water taken from the Jordan river. This indicates that the CMNPs ability to adsorb phosphates is independent of other components in river water. Additionally, adsorption measurements were taken using the average pH, temperature, and phosphate concentration of the river water in order to ensure results comparable to those of (Kim 2017). A maximum adsorption rate of 0.138mg of phosphate per gram of adsorbent was found with the majority of adsorption taking place within the first 15 minutes of contact with the adsorbent. The adsorption of phosphates using CMNPs presents an effective and environmentally friendly solution to reducing phosphates in aquatic ecosystems without altering the characteristics of river water.

scholarly journals Combined effect of furanone fluconazole and amphotericin B against biofilms formed from Cryptococcus neoformans

2021 ◽  
Vol 17 (5) ◽  
pp. 536-540
Author(s):  
Kirishnamoorthy Meenakumari ◽  
Keyword(s):  
Cryptococcus Neoformans ◽  
Amphotericin B ◽  
Drug Concentration ◽  
Combined Effect ◽  
Amphotericine B ◽  
Amphotéricine B

It is of interest to document the combined effect of furanone fluconazole and amphotericin B against the biofilm formed by Cryptococcus neoformans. The MIC values of amphotericine B and Fluconazole were observed as 20μg/ml and 60μg/ml, respectively. The MIC for the Combination (Amphotericin B/ Fluconazole) was found to be at (15/20) μg/ml drug concentration. Thus, data shows the combined effect of furanone fluconazole and amphotericine B derivative against C. neoformans.

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