Michael Sulyok

Michael Sulyok
University of Natural Resources and Life Sciences Vienna | boku · Department of Agrobiotechnology

PhD

About

407
Publications
107,270
Reads
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12,910
Citations
Citations since 2016
250 Research Items
9463 Citations
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201620172018201920202021202205001,0001,500
201620172018201920202021202205001,0001,500
201620172018201920202021202205001,0001,500
Additional affiliations
August 2005 - present
Universität für Bodenkultur Wien
August 2004 - July 2005
September 1999 - July 2004
Technische Universität Wien
Position
  • Technische Universität Wien - Vienna University of Technology

Publications

Publications (407)
Preprint
Full-text available
Background Fungi are important sources for bioactive compounds that find their applications in many important sectors like in the pharma-, food- or agricultural industries. In an environmental monitoring project for fungi involved in soil nitrogen cycling we also isolated Cephalotrichum gorgonifer (strain NG_p51). In the course of strain characteri...
Article
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Modern agriculture depends highly on pesticides and pharmaceutical preparations, so controlling exposure to these substances in the feed and food chain is essential. This article presents the first study on residues of a broad spectrum of pesticides and veterinary drugs in the diets of dairy cattle. One hundred and two representative samples of the...
Article
Long‐term transport and storage of peeled almonds under unsuitable conditions may cause the product's rejection. To get knowledge in this topic, peeled almonds were stored at 25°C and 60, 70, and 80% relative humidity (RH). The maintenance of high RH (80%) caused some visual defects after 4 months. Even though the 60, 70, and 80% RH did not clearly...
Presentation
Full-text available
Wheat (Triticum aestivum L.) is one of the major cereal crops and constitutes a major part of the daily human and animal diet. One of the most important risks associated with wheat consumption are mycotoxins, mainly produced by Fusarium species. The most important mycotoxins in wheat are mainly Fusarium toxins, such as deoxynivalenol (DON), zearale...
Article
Full-text available
Mould is a ubiquitous threat to safe food. In this work, a combination of three reliable methods to identify mould present in food at the species level is presented, to estimate the safety of the apparently non-moldy slices of bread and therefore contribute to the prevention of food waste. In overstored sliced bread, three mould species on the firs...
Article
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Infrared (IR) spectroscopy is increasingly being used to analyze food crops for quality and safety purposes in a rapid, nondestructive, and eco-friendly manner. The lack of sensitivity and the overlapping absorption characteristics of major sample matrix components, however, often prevent the direct determination of food contaminants at trace level...
Article
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Spent brewery grains (BSG) are the main by-product of beer production and are incorporated in rations of food-delivering animals, mainly dairy cows. Like other agricultural commodities, BSG can be contaminated by a broad spectrum of natural and synthetic undesirable substances , which can be hazardous to animal and human health as well as to the en...
Article
This study assessed the profiles of mycotoxins and other contaminants present in complementary foods consumed by Nigerian infants and young children (IYC) within the first 18 months of life. In total, 92 complementary foods and one herbal mixture collected at 3-months interval were subjected to LC/MS-MS analysis. Aflatoxin B1 contaminated ogi and t...
Article
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Dairy production is a pivotal economic sector of Austrian and European agriculture. Di- etary toxins and endocrine disruptors of natural origin such as mycotoxins and phytoestrogens can affect animal health, reproduction, and productivity. This study characterized the profile of a wide spectrum of fungal, plant, and unspecific secondary metabolites...
Article
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Sorghum is the main staple food crop in developing countries, including Ethiopia. However, sorghum grain quantity and quality are affected by contaminating fungi both under field and post-harvest stage. The aim of the current study was to assessed fungal species and multi-mycotoxins associated with sorghum grain in post-harvest samples collected fr...
Article
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High levels of mycotoxins are occasionally observed in Norwegian oat grain lots. Mycotoxins of primary concern in Norwegian oats are deoxynivalenol (DON) produced by Fusarium graminearum and HT2- and T2-toxins (HT2 + T2) produced by Fusarium langsethiae . Improved understanding of the epidemiology of Fusarium spp. is important for the development o...
Article
Full-text available
Depending on the prevailing environmental, developmental and nutritional conditions, fungi activate biosynthetic gene clusters (BGC) to produce condition-specific secondary metabolites (SMs). For activation, global chromatin-based de-repression must be integrated with pathway-specific induction signals. Here we describe a new global regulator neede...
Article
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Co‐culturing the bacterium Streptomyces rapamycinicus and the ascomycete Aspergillus nidulans has previously been shown to trigger the production of orsellinic acid (ORS) and its derivates in the fungal cells. Based on these studies it was assumed that direct physical contact is a prerequisite for the metabolic reaction that involves a fungal amino...
Article
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The European Food Safety Authority is currently evaluating the risks related to the presence of emerging mycotoxins in food and feeds. The aim of this study was to investigate the role of soil fertility, resulting from different nitrogen fertilization rates, on the contamination of regulated mycotoxins and emerging fungal metabolites in maize grain...
Article
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The present interlaboratory comparison study involved nine laboratories located throughout the world that tested for 24 regulated and non-regulated mycotoxins by applying their in-house LC-MS/MS multi-toxin method to 10 individual lots of 4 matrix commodities, including complex chicken and swine feed, soy and corn gluten. In total, more than 6000 d...
Preprint
Full-text available
Direct physical interaction between the bacterium Streptomyces rapamycinicus and the ascomycete Aspergillus nidulans has previously been shown to trigger the production of orsellinic acid and its derivates in the fungus. Here we identified the substance produced by the bacterium that is responsible for this reaction, a guanidine containing macrolid...
Article
Full-text available
Background: Fusarium poae is one of the most common Fusarium head blight (FHB) causal agents in wheat. This species can biosynthesize a wide range of mycotoxins, in particular nivalenol (NIV). In FHB epidemiology, infection timing is important for disease occurrence, kernel development, symptom appearance and mycotoxin accumulation in grain. This...
Article
Matrix effects continue to be an issue in small molecule quantitation in food analysis, with researchers exploring different approaches to circumvent the issue. LCGC Europe talked to Rudolf Krska and Michael Sulyok from the University of Natural Resources and Life Sciences (BOKU), Vienna, Austria, about their work to develop a multi-analyte approac...
Article
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There is interest in understanding the relationship between naturally contaminated commodities and the potential for the production of different useful and toxic secondary metabolites (SMs). This study examined the impact of interacting abiotic stress parameters of water availability and temperature of stored naturally contaminated maize on the SM...
Article
Bacteria of the genus Sphingomonas, Aureobasidium pullulans yeast-like fungus and yeast Debaryomyces hansenii naturally colonize wheat grain. Selected isolates of these microorganisms, antagonistic against Fusarium spp., can be applied to wheat spikes to complement chemical control methods. The aim of this study was to determine the content of Fusa...
Article
Full-text available
Fungi and mycotoxins in silage can have detrimental consequences for both cattle and human health. This pilot study identified, via the routinary direct plating method, the dominant cultivable fungi in mouldy grass silages (GS) ( n = 19) and maize silages (MS) ( n = 28) from Austria. The profiles of regulated, modified, and emerging mycotoxins toge...
Article
Alternaria alternata is one of the main microorganisms responsible for affecting seeds and causing infection and eventually seed discoloration. The purpose of this work was to analyze sanitary quality in seeds of five amaranth genotypes, of which four were late-cycle (160 days) and the remaining one was early-cycle (79 days). Trials were carried ou...
Article
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An isolate of Macrophomina phaseolina from muskmelons (Cucumis melo) was reported by Dunlap and Bruton to produce red pigment(s) in melons and in culture in the presence of added glycine, alanine, leucine, or asparagine in the medium, but not with some other amino acids and nitrogen-containing compounds. We explored the generality and mechanism of...
Article
The study investigated the incidence of mycobiota, Aspergillus spp metabolites and aflatoxin biosynthesis precursors in 60 samples of seeds and haulms of improved groundnut genotypes in Nigeria. Culturing of the infected seeds was done using the agar plate method and mycobiota identification was done using conventional cultural and microscopy metho...
Article
Full-text available
Cheese represents a dairy product extremely inclined to fungal growth and mycotoxin production. The growth of fungi belonging to Aspergillus, Penicillium, Fusarium, Claviceps, Alternaria, and Trichoderma genera in or on cheese leads to undesirable changes able to affect the quality of the final products. In the present investigation, a total of 68...
Article
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A multi-specimen, multi-mycotoxin approach involving ultra-sensitive LC-MS/MS analysis of breast milk, complementary food and urine was applied to examine mycotoxin co-exposure in 65 infants, aged 1–18 months, in Ogun state, Nigeria. Aflatoxin M1 was detected in breast milk (4/22 (18%)), while six other classes of mycotoxins were quantified; includ...
Article
Maize can be contaminated with a wide range of fungal secondary metabolites that decrease the quality and safety of maize and maize-derived products. The increase of natural fungal metabolites occurrence in maize, influenced by climate changes, is recognized as a significant issue in recent years. Therefore, the main aim of this study was to invest...
Article
Farmers, cereal suppliers and processors demand rapid techniques for the assessment of mould-associated contamination. Deoxynivalenol (DON) is among the most important Fusarium toxins and related to human and animal diseases besides causing significant economic losses. Routine analytical techniques for the analysis of DON are either based on chroma...
Article
Even though biological hazards in the work environments related to waste management were the subject of many scientific works, the knowledge of the topic is not extensive. This study aimed to conduct a comprehensive assessment of microbiological and toxicological hazards at the workstations in a waste sorting plant and develop guidelines for select...
Article
The Chaco wetland is among the most biologically diverse regions in Argentina. In collections of fungi from asymptomatic native grasses (Poaceae) from the wetlands, we identified isolates of Fusarium that were morphologically similar to F. armeniacum, but distinct from it by their production of abundant microconidia. All the isolates had identical,...
Conference Paper
Full-text available
Fusarium head blight (FHB) is one of the most dangerous wheat diseases causing yield and quality losses and is also associated with mycotoxin accumulation which threatens human and animal health. The aim of the study was to examine the occurrence of the metabolites produced by Fusarium species in winter wheat varieties. The experiment was set up in...
Article
Full-text available
Fusarium head blight (FHB) is an important disease of wheat and production of mycotoxins makes it a major threat in most wheat-producing areas worldwide. This study aimed to identify the impact of epidemic FHB conditions (usage of artificial Fusarium inoculation) on mycotoxin levels in unprocessed wheat. Fusarium levels were monitored at two locati...
Article
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As aflatoxins are a global risk for humans and animals, testing methods for rapid on-site screening are increasingly needed alongside the standard analytical laboratory tools. In the presented study, lateral flow devices (LFDs) for rapid total aflatoxin screening were thoroughly investigated with respect to their matrix effects, cross-reactivity, t...
Article
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Despite the awareness that work in the sewage treatment plant is associated with biological hazards, they have not been fully recognised so far. The research aims to comprehensively evaluate microbiological and toxicological hazards in the air and settled dust in workstations in a sewage treatment plant. The number of microorganisms in the air and...
Article
Full-text available
This study characterized the health risks due to the consumption of mycotoxin-contaminated foods and assessed the consumer awareness level of mycotoxins in households in two north-central Nigerian states during the harvest and storage seasons of 2018. Twenty-six mycotoxins and 121 other microbial and plant metabolites were quantified by LC-MS/MS in...
Article
Exposure to food and environmental contaminants is a global environmental health issue. In this study, innovative LC-MS/MS approaches were applied to investigate mycotoxin co-exposure in mother-infant pairs (n = 23) by analyzing matched plate-ready food, breast milk and urine samples of mothers and their exclusively breastfed infants. The study rev...
Article
Aspergillus species produce numerous metabolites, including mycotoxins, which prevalence in maize is significant health and economic issue worldwide. The aim of this study was to investigate the prevalence of Aspergillus metabolites in 458 maize samples collected during 2016 and 2017 in the Republic of Serbia. Samples were analysed by liquid chroma...
Poster
Full-text available
Fusarium is a genus of filamentous fungi and one of the most important plant pathogens causing Fusarium head blight. Due to their great ability to adapt to different environmental conditions, Fusarium species are widely spread across the globe and cause not only economic losses but threaten human and animal health. Although Fusarium head blight is...
Article
The main objective of this study was to determine the presence of Fusarium metabolites in maize samples collected from different regions of Northern Serbia (Bačka, Banat and Srem) during a period of two years (2016–2017). A total of 458 maize samples were analysed by liquid chromatography-tandem mass spectrometry. A total of 40 metabolites were det...
Article
Full-text available
Abstract: Two new species, Penicillium krskae (isolated from the air as a lab contaminant in Tulln (Austria, EU)) and Penicillium silybi (isolated as an endophyte from asymptomatic milk thistle (Silybum marianum) stems from Josephine County (Oregon, USA)) are described. The new taxa are well supported by phenotypic (especially conidial ornamentatio...
Article
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The emerging mycotoxin fusaproliferin is produced by Fusarium proliferatum and other related Fusarium species. Several fungi from other taxonomic groups were also reported to produce fusaproliferin or the deacetylated derivative, known as siccanol or terpestacin. Here, we describe the identification and functional characterization of the Fusarium p...
Article
The aim of this study was to apply modern analytical tools, liquid chromatography‐tandem mass spectrometric method (LC‐MS/MS), for identification and quantitation of Alternaria metabolites in maize samples. Maize samples were collected from the main maize‐producing regions (Bačka, Banat and Srem) of the Republic of Serbia during two harvest seasons...
Article
Full-text available
Pastures are key feed sources for dairy production and can be contaminated with several secondary metabolites from fungi and plants with toxic or endocrine-disrupting activities, which possess a risk for the health, reproduction and performance of cattle. This exploratory study aimed to determine the co-occurrences and concentrations of a wide rang...
Article
Fusarium fujikuroi and Fusarium graminearum are agronomically important plant pathogens, both infecting important staple food plants and thus leading to huge economic losses worldwide. F.fujikuroi belongs to the Fusarium fujikuroi species complex (FFSC) and causes bakanae disease on rice, whereas F.graminearum, a member of the Fusarium graminearum...
Article
Full-text available
DNA methylation mediates organisms’ adaptations to environmental changes in a wide range of species. We investigated if a such a strategy is also adopted by Fusarium graminearum in regulating virulence toward its natural hosts. A virulent strain of this fungus was consecutively sub-cultured for 50 times (once a week) on potato dextrose agar. To ass...
Article
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The consumption of high-quality Andean grains (a.k.a. pseudocereals) is increasing worldwide, and yet very little is known about the susceptibility of these crops to mycotoxin contamination. In this survey study, a multi-analyte liquid chromatography–tandem mass spectrometry (LC–MS/MS) method was utilised to determine mycotoxin and fungal metabolit...
Article
Full-text available
Fusarium head blight (FHB) is a devastating fungal disease of small-grain cereals that causes significant yield losses and mycotoxin contamination, diminishing food and feed safety worldwide. In contrast to wheat, little is known about the agricultural practices that influence FHB and Fusarium mycotoxins in barley. Thus, a nationwide survey was con...
Article
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The occurrence of secondary metabolites and co-contaminants in dairy cow feed samples (n = 115), concentrate, roughage, and mixed feed, collected from Ratchaburi and Kanjanaburi provinces, Thailand, between August 2018 and March 2019 were investigated using LC-MS/MS based multi-toxin method. A total of 113 metabolites were found in the samples. Fun...
Article
Full-text available
Fullerol C60 (OH)24 nanoparticles (FNP)-wheat-A. flavus interaction outcome is more complicated in the presence of drought. This study sheds light on how the presence of FNP affects food and feed safety from the perspective of mycotoxin contamination. The study aims to determine the influence of FNP at environmentally plausible concentrations on whea...
Article
Ogi is a fermented cereal beverage, made primarily from maize (Zea mays) and rarely from millets. Unlike maize-based ogi, little is known about the bacterial community and mycotoxin profile during the production of millet-based ogi. Therefore, the bacterial community dynamics and mycotoxin reduction during ogi processing from three millet varieties...
Article
Full-text available
A total of 117 fungal metabolites were detected in grains collected in Gunja-G (flooded village) and Gornji Stupnik-GS (control village), located in the Zagreb County, Croatia. Major mycotoxins and derivatives (17), ergot alkaloids (14), Fusarium (23), Aspergillus (18), Penicillium (18), Alternaria (7) and other fungal and unspecific metabolites (2...
Article
Full-text available
Barley can be contaminated with a wide range of fungal secondary metabolites, including various mycotoxins that reduce the quality and safety of raw materials as well as cause economic losses. A survey was conducted for the crop seasons 2016 and 2017 to analyse fungal metabolites, including mycotoxins, in grain and straw samples of barley, which or...
Article
In winter and summer of 2016 and 2017, airborne fungi and house dust were collected in indoors of the village Gunja, which had been flooded, and the control village Gornji Stupnik (Croatia) in order to explore variations of fungal indoor levels, particularly Aspergilli section Nidulantes series Versicolores, as well as fungal metabolites in dust. L...
Article
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One of the most important food safety issues is the detection of mycotoxins, the ubiquitous, natural contaminants in cereals. Hyperspectral imaging (HSI) is a new method in food science, it can be used to predict non-destructively the changes in compositio