Publications by authors named "Atabay H"

This study hypothesizes that advanced machine learning (ML) models can more accurately predict certain critical water quality parameters in marine environments compared to conventional regression techniques. We specifically evaluated the spatio-temporal distribution of Chlorophyll-a (Chl-a) and Secchi Disk Depth (SDD) in the Gulf of Izmit using in-situ measurements and Sentinel-2 satellite imagery from October 2021 and 2022. Among the models tested, the Support Vector Regression (SVR) model showed better predictive performance, achieving the lowest RMSE for SDD (1.

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In this study, we used a comprehensive array of sampling techniques to examine the pollution caused by organic micropollutants in İzmit Bay for the first time. Our methodology contains spot seawater sampling, semi-permeable membrane devices (SPMDs) passive samplers for time-weighted average (TWA), and sediment sampling for long-term pollution detection in İzmit Bay, together. Additionally, the analysis results obtained with these three sampling methods were compared in this study.

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This research deals with the land-based pressures on the southern Black Sea coast (Turkey), with the objective of assessing their eutrophication impacts. In this context, reference values of some of the eutrophication indicators were calculated, and eutrophication assessment was carried out for this area using the holistic approach NEAT (Nested Environmental Status Assessment Tool). In addition, correlations between NEAT results of coastal regions and pressure-impact analysis methods were investigated.

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Purpose: A bacteriophage is a virus that infects and replicates within a bacterium following the injection of phage genome into the bacterial cytoplasm. They are seen as a possible therapy for multi-drug-resistant strains of many bacteria. The aim of this study is to evaluate the lytic activity of the Pyo, Intesti and Fersisi bacteriophage cocktails on P.

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Water plays an important role in the transmission of Arcobacter spp. to animals and humans. The aim of this study was to isolate and characterize Arcobacter spp.

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Article Synopsis
  • Ischemia involves a lack of oxygen in organs due to reduced blood flow, which can lead to cell death, particularly significant during lung transplantation when ischemia/reperfusion (I/R) occurs.
  • The study investigated the expression of various genes related to cell death and regeneration in lung tissues of rats after inducing ischemia and varying durations of reperfusion.
  • Results showed increased expressions of Bcl-XL and Caspase-3 in the group experiencing 1 hour of ischemia, suggesting that I/R injury may activate apoptotic mechanisms in lung cells.
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Increasing marine traffic, over 55,000 ships visit per year, through the Turkish Straits System and the Sea of Marmara, produces a yearly average of 12 illegal oil discharges. This paper documents the comparison of chemical fingerprints of spilled oil with suspected sources of oils for identifying the source of illegal pollution in Turkey's seas. Fingerprinting is initiated by comparison of the synchronous fluorescence spectra (Δ=20 or 15 nm) of fugitive and suspected source oils.

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Anionic surfactant-biodegrading capability of an Arcobacter butzleri strain was analyzed under aerobic conditions. The A. butzleri isolate displayed efficient surfactant-biodegrading capacity for sodium dodecyl sulfate (SDS) at concentrations of up to 100 mg/L in 6 days, corresponding to 99.

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The aims of this study were as follows: (i) to isolate Arcobacter spp. from the stool samples of patients with gastroenteritis; (ii) to identify them with molecular methods; (iii) to genotype them using enterobacterial repetitive intergenic consensus (ERIC)-PCR; and (iv) to determine their antibiotic susceptibilities. For the study, a total of 3287 diarrhoeal stool samples submitted to the Microbiology Laboratory of the Kayseri Training and Research Hospital, Kayseri, Turkey, between 2010 and 2011 were analysed.

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In this study, antimicrobial films were developed against Campylobacter jejuni by incorporation of gallic acid (GA) into zein-based films. The zein and zein-wax composite films containing GA between 2.5 and 10 mg/cm(2) were effective on different C.

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This study was undertaken to investigate the seroprevalence of brucellosis in unvaccinated sheep from the flocks having previous abortion cases in Kars and around, Turkey and to compare the efficacy of each serological test used. Four hundred serum samples collected from 16 different flocks of sheep having a history of abortions in Kars and its surrounding area in Turkey were examined for the presence of antibodies raised against Brucella using Rose Bengal Plate Test (RBPT), Serum Agglutination Test (SAT), Rivanol Agglutination Test (RAT) and Complement Fixation Test (CFT). All animals were unvaccinated against Brucella.

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In this study, the prevalence and distribution of various Arcobacter spp. were investigated in samples taken from the cloacae of healthy domestic geese raised in Turkey. A membrane filtration technique with a non-selective blood agar was employed after enrichment in Arcobacter enrichment broth (AEB) to isolate a wide range of Arcobacter spp.

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Aims: To determine the prevalence of Arcobacter in various food, animal and water sources in Turkey and to subtype the isolated strains using enterobacterial repetitive intergenic consensus (ERIC)-PCR.

Methods And Results: A total of 806 samples consisting of chicken (100) and turkey meat (100); minced beef (27); rectal swabs from cattle (173), sheep (68) and dogs (62); cloacal swabs of broilers (100) and layers (100); gall bladders of cattle (50) and drinking water samples (26) were examined. A previously described membrane filtration method was used for the isolation.

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Tularemia, casued by Francisella tularensis, is a zoonotic disease presenting various clinical forms. In the present study, three outbreaks of tularemia occurred from January to March and September in 2004 (first and second) and January to March in 2005 (third) are reported from the north-eastern part of Turkey. All cases originated from the same geographical location.

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The prevalence and diversity of different Arcobacter spp. in various poultry species in Denmark were investigated using cultural and multiplex PCR methods. A pool of three fresh droppings obtained at the production site from 70 broiler chicken flocks aged 4-5 weeks was examined.

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Aims: To investigate the potential of amplified fragment length polymorphism (AFLP) profiling for genotyping Arcobacter butzleri and to obtain further data on the genetic diversity of this organism.

Methods And Results: Seventy-three isolates of Danish, British, Turkish, Swedish, Nigerian and North American origin from human infections, chickens, turkeys, ducks, sheep and poultry abbatoir effluent were studied by use of a protocol that involved stringent PCR amplification of fragments derived from digestion of genomic DNA with restriction enzymes BglII and Csp6I. The mean similarity value of duplicate profiles of 10 isolates was 91.

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Aims: To investigate the presence of Arcobacter spp. in minced beef meat (n = 97) and rectal faecal samples (n = 200) collected from cattle immediately after slaughter at a local abattoir in Turkey.

Methods And Results: Meat samples were examined using three different isolation procedures (CAT-supplemented media, de Boer arcobacter isolation method and membrane filtration method), but only one method (CAT-supplemented media) was employed for faecal samples.

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Aims: To evaluate the efficacy of amplified fragment length polymorphism (AFLP)-based genetic profiling for taxonomic and epidemiological analyses of diverse Arcobacter species.

Methods And Results: Seventy-two isolates of A. butzleri, A.

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In this study, the prevalence of Arcobacter spp. on chicken carcasses sold in various retail markets in Turkey was investigated. The isolates were characterized and identified using various phenotypic and molecular tests.

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Aims: The objective of this study was to subtype Arcobacter butzleri isolates using RAPD-PCR.

Methods And Results: Thirty-five A. butzleri isolates obtained from chicken carcasses were examined.

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Aims: The objective of this study was to determine the susceptibility of Arcobacter butzleri isolates to various antimicrobial agents used in the treatment of infectious diseases in humans and animals.

Methods And Results: Thirty-nine A. butzleri strains isolated from broiler chickens were tested for their susceptibility to 23 antimicrobial agents using a disc diffusion method.

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Aims: The objectives of this study were to determine the presence of thermophilic Campylobacter spp. in free range domestic geese, and to characterize isolated strains using phenotyping criteria and SDS-PAGE of whole-cell proteins.

Methods And Results: Forty cloacal swabs from two different flocks of domestic geese were examined.

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Eighteen strains of Campylobacter sputorum bv. paraureolyticus (isolated over a 12-month period from seven dairy cows contained in a single herd) were examined by resistotyping, and macrorestriction profiling using pulsed field gel electrophoresis (PFGE). The resistotypes of these strains were identical, although repeat testing indicated resistance to metronidazole was not a reliable trait for typing purposes.

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Twenty-six unclassified Campylobacter-like strains previously isolated from 15 chicken carcasses and caecal contents, together with two more strains isolated from chicken faeces on a different occasion, were identified as Helicobacter pullorum using various phenotypic identification methods. API Campy identification kits and a 16-test identification scheme developed for campylobacters failed to identify these bacteria, or identified them as Campylobacter spp. Eighteen strains (including the two isolated on a different occasion) were chosen for examination using a more comprehensive probabilistic identification scheme.

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