Consulta: subjectFacets:"Aflatoxin"
Registros recuperados: 27
Data/hora: 02/06/2024 12:55:57

Association of the severity of tongue lesions in broiler chickens with the quality of corn in feed
Provedor de dados: 86
Autores: Vaccari,Isabel Cristina Mores; Duarte,Vinicius; Rodrigues,Denise Russi; Santos,Fabiana Ramos dos; Minafra,Cibele Silva.
Abstract: The objective of this work was to determine the correlation of the physical attributes of corn and the mycotoxins present in its grains with the severity of tongue lesions in broiler breeder roosters. The occurrence of the aflatoxin, vomitoxin, zearalenone, T-2 toxin, and fumonisin mycotoxins was detected in the corn grains used in the feed formulation for breeder chickens. The percentages of moisture and broken grains were positively correlated (Pearson’s correlation) with the presence of aflatoxin. Milder lesions (grade 1) are positively correlated with aflatoxin and negatively correlated with fumonisin, and the most severe lesions (grade 3) are positively correlated with vomitoxin, fumonisin, and T-2 toxin.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aflatoxin; Aviculture; Fumonisin; Mycotoxin; T-2 toxin; Vomitoxin.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017001000942

Aflatoxin Redux: Does European Aflatoxin Regulation Hurt Groundnut Exporters from Africa?
Provedor de dados: 31
Autores: Xiong,   Bo; Beghin,   John C.
Replaced with revised version of paper 07/02/10.
Tipo: Conference Paper or Presentation
Palavras-chave: Food safety; Standards; Aflatoxin; Maximum Residues Limit; Groundnut; Gravity equation; Africa; Market access; EU; Agricultural and Food Policy; Community/Rural/Urban Development; Crop Production/Industries; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; International Development; International Relations/Trade; Q17; F13.
Ano: 2010
URL: http://purl.umn.edu/61314

What You Don’t Know Can Hurt You: Micronutrient Content and Fungal Contamination of Foods in Developing Countries
Provedor de dados: 31
Autores: Hoffmann,   Vivian.
The negative effects of micronutrient deficiencies on human capital acquisition and economic productivity are well documented. A less well understood but potentially serious threat to human health in developing countries is the contamination of food crops by fungal toxins. This paper surveys what is known about the health and economic burdens attributable to insufficient micronutrients and toxic contamination of food in developing countries, discusses consumer demand for micronutrients and food safety, and describes some of the challenges to improving population nutrition, particularly in rural areas.
Tipo: Journal Article
Palavras-chave: Food safety; Micronutrients; Aflatoxin; Developing countries; Food Consumption/Nutrition/Food Safety; International Development.
Ano: 2009
URL: http://purl.umn.edu/55548

The Preventive Effects of Different Doses of Glucomannan on Experimental Aflatoxicosis in Japanese Quails
Provedor de dados: 89
Autores: Yavuz,O; Özdemir,Ö; Ortatatli,M; Atalay,B; Hatipoglu,F; Terzi,F.
ABSTRACT This experimental study was performed to investigate whether there is a protective effect of different doses of Glucomannan using against aflatoxicosis in Japanese quail, and pathological changes and relative organ weights were compared. In the experiment, 60 one-day old male Japanese quails were used as divided into six different groups. Experimental groups were designated as Control(C), aflatoxin(A), glucomannan(GM), 2-fold dose of glucomannan(2GM), aflatoxin+glucomannan(A+GM) and aflatoxin+2-fold dose of glucomannan(A+2GM). While control group quails fed the standard ration as ad libitum, other groups were fed with the administrations additionally to standard diet respectively; 2mg/kg of aflatoxin to group A, 1g/kg of glucomannan to group GM,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aflatoxin; Glucomannan; Histopathology; Quail.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2017000300409

Evaluation of yeast cell wall on the performance of broiles fed diets with or without mycotoxins
Provedor de dados: 89
Autores: Santin,E; Paulillo,AC; Nakagui,LSO; Alessi,AC; Maiorka,A.
This experiment aimed at evaluating the effects of the interactions between aflatoxin (500 or 250 ppb) and ochratoxin (500 or 250 ppb), and the possible benefits of adding yeast cell wall to prevent the effects of these mycotoxins in broiler chickens. Relative organ weight gain and live performance were evaluated at 21 and 42 days of age. Results indicated that at the levels of mycotoxins included in the experimental diets, ochratoxin reduced feed intake and body weight gain, and aflatoxin only affect feed intake of 21-day-old birds. No interaction was observed between aflatoxin and ochratoxin at the levels used in experimental study. Yeast cell wall did not significantly reduced the deleterious effects of ochratoxins. No significant differences were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aflatoxin; Ochratoxin; Yeast cell wall; Broilers; Performance.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2006000400004

Performance and egg quality of laying hens fed diets containing aflatoxin, fumonisin and adsorbent
Provedor de dados: 89
Autores: Siloto,EV; Sartori,DRS; Oliveira,EFA; Sartori,JR; Fascina,VB; Berto,DA.
The effects of aflatoxin and fumonisin and their combination on egg production and quality, as well as the efficacy of a mycotoxin adsorbent in reducing or eliminating these effects in commercial layers. A number of 168 layers with initial age of 37 weeks were submitted to an experimental period of 56 days. A completely randomized experimental design in a 3x2+1 factorial arrangement was applied (3 treatments with mycotoxins: aflatoxin (AF), fumonisin (FU), or aflatoxin + fumonisin (AF+FU); 2 treatments with or without adsorbent; and a control group that was fed no mycotoxins, nor adsorbent), totaling 7 treatments with 6 replicated of 4 birds/cage. The dietary inclusion levels were 1ppm AF, 25ppm FU, and 2 kg adsorbent/ton feed. Birds fed AF presented the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Adsorbent; Aflatoxin; Fumonisin; Layers; Performance.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2011000100004

Effects of Yeast Glucomannan and Sodium Bentonite on the Toxicity of Aflatoxin in Broilers
Provedor de dados: 89
Autores: Azizpour,A; Moghadam,N.
ABSTRACT The aim of this study was to evaluate the efficacy of a yeast glucomannan (YG) and sodium bentonite (SB) in reducing the toxicity of aflatoxin for broilers fed a diet naturally contaminated with aflatoxin. In total, 300 7-day-old Ross 308 broilers were randomly assigned to 10 dietary treatments, consisting of a diet with no aflatoxin (positive control), a diet naturally contaminated with 250 ppb aflatoxin (negative control), and eight aflatoxin-contaminated diets supplemented with different SB and YG and their combinations. Serum biochemical parameters and liver pathological changes were investigated when broilers were 42 days old. The birds fed the negative control diet presented lower uric acid, cholesterol, and triglyceride levels and higher in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aflatoxin; Biochemical parameters; Broilers; Pathological changes; Yeast glucomannan.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2015001000007

Mycotoxin contamination of diets for beef cattle finishing in feedlot
Provedor de dados: 96
Autores: Custódio,Letícia; Prados,Laura Franco; Yiannikouris,Alexandros; Holder,Vaughn; Pettigrew,James; Kuritza,Leandro; Resende,Flávio Dutra de; Siqueira,Gustavo Rezende.
ABSTRACT The objective of this survey was to identify what mycotoxins were present in ingredients used in diets offered to beef cattle in feedlots and their concentrations. The survey covered 30 Brazilian feedlots located in the five major beef-producing states. Samples of total mixed ration (TMR) and ingredients were collected and analyzed for mycotoxin using ultra-performance liquid chromatography coupled to tandem mass spectrometry. Mycotoxin concentrations were further interpreted according to known species-specific sensitivities and normalized according to the principles of toxic equivalent factors (risk equivalent quantities - REQ) expressed in µg kg−1 of aflatoxin B1-equivalent. Forty percent of the visited feedlots had apparent fungi in TMR....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aflatoxin; Beef cattle; Feedlots; Fumonisin; Ingredients.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100724

Aflatoxin removal of peanut meals with aqueous ethanol
Provedor de dados: 63
Autores: Fonseca,H.; Regitano-d'Arce,M.A.B.
A preliminary approach to achieve compatible simultaneous extraction of aflatoxin and residual oil from pressed oil meals was conducted to determine the minimum amount of water to be added to ethanol versus necessary time to achieve complete removal of aflatoxin. Commercial anhydrous, 96, 93 and 90°GL ethanol were utilized in trials with Soxhlet extractors. Commercial anhydrous ethanol did not remove aflatoxin completely and the extraction efficiency in minutes was directly proportional to the amount of water present in the ethanol, as expected. Although 96°GL ethanol was efficient, alcoholic strengths between 96 and 99°GL need be evaluated to improve oil extraction, provided they do not decrease aflatoxin removal efficiency.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aflatoxin; Peanut meal; Oil meals; Removal; Extraction; Aqueous ethanol; Ethanol.
Ano: 1993
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161993000100021

การติดเชื้อรา Aspergillus flavus และการปนเปื้อนสารอะฟลาทอกซินในถั่วลิสง 6 พันธุ์เมื่อกระทบแล้งในช่วงปลายของการเจริญเติบโต
Provedor de dados: 106
Autores: Ratanaporn Koolachart; Teerayoot Girdthai; Sanun Jogloy; Nimitr Vorasoot; Sopone Wongkaew; Aran Patanothai.
End of season drought at pod filling and maturity stages can severely reduce yield and increase the risk of aflatoxin contamination. Peanut varieties with resistance to drought may reduce Aspergillus flavus infection and aflatoxin contamination. The objectives of this study were to investigate the effects of late season drought during  80 days after planting (DAP) until harvest on A. flavus infection and aflatoxin contamination and to estimate the correlation coefficients between traits related to aflatoxin contamination and the correlation coefficients between traits related to drought resistance (SPAD chlorophyll meter reading (SCMR) and specific leaf area (SLA)) and traits to aflatoxin contamination (A. flavus infection and aflatoxin contamination) of 6...
Tipo: Collection
Palavras-chave: Arachis hypogaea L.; Aflatoxin; Drought tolerance; Peanut; Aspergillus flavus; ถั่วลิสง; อะฟลาทอกซิน; การปนเปื้อนเชื้อรา; ผลกระทบแล้ง; การทนแล้ง; ระยะสร้างฝัก; ผลผลิต; พันธุ์.
Ano: 2011
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5109

ผลประโยชน์ด้านสุขภาพอนามัยของผู้บริโภคในการประกาศมาตรฐานการปนเปื้อนสารอะฟลาทอกซินในถั่วลิสง
Provedor de dados: 106
Autores: Thanaporn Athipanyakul; Sanan Jogloy; Weera Pakuthai.
Objective of this study was to assess health economic benefits of published standard of aflatoxin residue in peanut by measuring the cost of illness. Data were carried out from the total number of 99 producers and 100 consumers in the Northeast and the North of Thailand. The results showed that 3.8 persons in 100,000 persons would be at the risk of liver cancer due to consumption of contaminated peanut. The benefit gain of 1,793 to 2,658 million baht per year was estimated in case of the enforcement of new standard. However, other benefits of all  stakeholders along supply chain of peanut must be considered for implementation of the policy. The fair comparison of benefits and costs of policy implementation of aflatoxin residue standard must also be taken...
Tipo: Collection
Palavras-chave: Peanut; Aflatoxin; Economic benefits; Cost of illness; ถั่วลิสง; อะฟลาทอกซิน; ผลประโยชน์ทางเศรษฐศาสตร์; ต้นทุนความเจ็บป่วย; การปนเปื้อนเชื้อรา.
Ano: 2011
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5106

ผลการเสริมไฮเดรตโซเดียมแคลเซียมอลูมิโนซิลิเกต (Detox®) ในอาหารที่ปนเปื้อนอะฟลาทอกซินต่อลักษณะทางพยาธิสภาพและสมรรถนะ การเจริญเติบโตของเป็ดเนื้อ
Provedor de dados: 106
Autores: Thianchai Sroirak; Sawitree Wongtangtintharn; Komkrich Pimpakdee; Jaowamarn Khajarern.
The aim of this study was to evaluate the efficacy of hydrate sodium calcium aluminosilicate (HSCAS; Detox®) in binding aflatoxin (AF) and ameliorating their mycotoxicity in meat type duck diets. Measurement the growth performance and pathology by HSCAS were supplemented to 60 or 120 ppb AF contaminated diets at either 0.10 or 0.20%. Body weight gain were reduced by 21.45% and mortality was increased by 7.50% in duck fed diet contaminated with AF at 120 ppb compared to duck fed control diet (30 ppb AF) for the 4 wk experimental period. However, dietary HSCAS supplementation effectively alleviated overall toxicity induced by AF. The significant treatment-related changes in feather growth, eye necrosis, web-toe hemorrhage, leg deformity, tibia bone porosity,...
Tipo: PhysicalObject
Palavras-chave: Meat-type ducks; Aflatoxin; Adsorbent; Growth performance; เป็ดเนื้อ; อะฟลาทอกซิน; สารดูดซับ; สมรรถนะการเจริญเติบโต; ไฮเดรตโซเดียมแคลเซียมอลูมิโนซิลิเกต; พยาธิสภาพ.
Ano: 2013
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5409

อะฟลาทอกซินในถั่วลิสง: ข้อเสนอวิธีแก้ปัญหา
Provedor de dados: 106
Autores: Sopone wongkaew; Sanun Jogloy.
Contamination of peanuts by aflatoxins, the carcinogenic mycotoxins produced by Aspergillus flavus and  A. parasiticus, has been a chronic problem in Thailand. This article presented the general knowledge of aflatoxins, their harms, factors affecting the fungal infection and aflatoxin contamination in peanuts and proposed a solution of  the problem throughout the peanut production chain and its consumption. The solution should consist of encouraging growers to follow the Good Agricultural Practices (GAP) in peanut production, enforcing the Good Manufacturing Practices (GMP) standard on peanut shellers, enforcing the regulation and limits of aflatoxin contamination of raw shelled peanuts to ensure their quality and safety in both domestic and imported...
Tipo: Collection
Palavras-chave: Peanuts; Aflatoxin; Good agricultural practices; GAP; ถั่วลิสง; สารก่อมะเร็ง; การปฏิบัติทางการเกษตรที่ดี; อะฟลาทอกซิน; การปนเปื้อน; สารก่อมะเร็ง.
Ano: 2011
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5193

Minimizing of Aflatoxin in Grain in the Tropics
Provedor de dados: 106
Autores: Siriacha, P.
Palavras-chave: Aflatoxin.
Ano: 1999
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5033

Occurrence of mycootoxins in alfalfa (Medicago sativa L.), sorghum [Sorghum bicolor (L.) Moench], and grass (Cenchrus ciliaris L.) retailed in the state of Nuevo León, México
Provedor de dados: 115
Autores: Huerta-Treviño,Alejandra; Dávila-Aviña,Jorge E.; Sánchez,Eduardo; Heredia,Norma; García,Santos.
Abstract Mycotoxins are secondary metabolites produced by specific filamentous fungi that are common contaminants of agricultural commodities. These compounds are toxic to humans and animals, and they are a health problem worldwide. Mycotoxin-containing feeds can cause serious diseases in farm animals and substantial economic losses. Therefore, the objective of this study was to determine the occurrence and levels of six mycotoxins in three types of forage at retail in the state of Nuevo León, México. The hypothesis was that all types of forages were contaminated with at least one of the six mycotoxins analyzed. One hundred and twenty samples of alfalfa (Medicago sativa L.), sorghum [Sorghum bicolor (L.) Moench], and grass (Cenchrus ciliaris L.) used for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mycotoxins; Forages; Aflatoxin; Fumonisin; Ochratoxin.
Ano: 2016
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952016000700825

Nutritional changes in powdered red pepper upon in vitro infection of Aspergillus flavus
Provedor de dados: 58
Autores: Tripathi,Smita; Mishra,H.N.
Quantitative losses in various biochemical constituents like capsaicin, carotenes, ascorbic acid, polyphenols, mineral matter, sugars (soluble and insoluble), protein and fat were estimated after the successful growth of Aspergillus flavus for 30 days on powdered red pepper. The fungal biomass was measured by ergosterol content and Aflatoxin B1 by HPLC. Amongst the various nutritional constituents evaluated for nutritional losses and changes the highest nutritional loss was reported in total carotenoids (88.55%) followed by total sugars (85.5%). The protein content of the infected sample increased from 18.01% to 23%. The nutritional profile of chilli powder (Capsicum annum var. sannam L.) shows highest share of total soluble sugars (32.89%) and fiber...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aspergillus flavus; Chili powder; Nutritional changes; Aflatoxin.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822009000100024

Molecular characterisation of Aspergillus flavus isolates from peanut fields in India using AFLP
Provedor de dados: 58
Autores: Singh,Diwakar; Radhakrishnan,T.; Kumar,Vinod; Bagwan,N.B.; Basu,M.S.; Dobaria,J.R.; Mishra,Gyan P.; Chanda,S.V.
Aflatoxin contamination of peanut, due to infection by Aspergillus flavus, is a major problem of rain-fed agriculture in India. In the present study, molecular characterisation of 187 Aspergillus flavus isolates, which were sampled from the peanut fields of Gujarat state in India, was performed using AFLP markers. On a pooled cluster analysis, the markers could successfully discriminate among the ‘A’, ‘B’ and ‘G’ group A. flavus isolates. PCoA analysis also showed equivalent results to the cluster analysis. Most of the isolates from one district could be clustered together, which indicated genetic similarity among the isolates. Further, a lot of genetic variability was observed within a district and within a group. The results of AMOVA test revealed that...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aflatoxin; AMOVA; ELISA; Genetic diversity; Groundnut; PCA.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822015000300673

Production of aflatoxins by Aspergillus flavus and of fumonisins by Fusarium species isolated from Brazilian sorghum
Provedor de dados: 58
Autores: Silva,Josefa B. da; Dilkin,Paulo; Fonseca,Homero; Corrêa,Benedito.
Fifty-nine Aspergillus flavus and 35 Fusarium verticillioides strains, isolated from freshly harvested (10) and stored (130) Brazilian sorghum samples, were tested regarding their ability to produce aflatoxins (coconut milk agar) and fumonisins (rice culture), respectively. Aflatoxins B1 and B2 were detected by TLC, and fumonisins B1 and B2 were analyzed by HPLC. Thirty-eight (64.4%) A. flavus strains produced detectable levels of aflatoxins at concentrations ranging from 12.00 to 3282.50 µg/kg (AFB1 + AFB2), while thirty two (91%) F. verticillioides strains produced FB1 at concentrations ranging from 0.12 to 5.38 µg/g. Two F. proliferatum strains produced low fumonisin levels. The toxigenic potential of A. flavus (64.4%) and F. verticillioides (91.5%)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Toxigenicity; Aspergillus flavus; Fusarium verticillioides; Mycotoxins; Sorghum; Aflatoxin; Fumonisin.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822004000200002

The potential effects of Zataria multiflora Boiss essential oil on growth, aflatoxin production and transcription of aflatoxin biosynthesis pathway genes of toxigenic Aspergillus parasiticus
Provedor de dados: 58
Autores: Yahyaraeyat,R.; Khosravi,A.R.; Shahbazzadeh,D.; Khalaj,V.
This study aims at evaluating the effects of Zataria multiflora (Z. multiflora) essential oil (EO) on growth, aflatoxin production and transcription of aflatoxin biosynthesis pathway genes. Total RNAs of Aspergillus parasiticus (A.parasiticus) ATCC56775 grown in yeast extract sucrose (YES) broth medium treated with Z. multiflora EO were subjected to reverse transcription-polymerase chain reaction (RT-PCR). Specific primers of nor-1, ver-1, omt-A and aflR genes were used. In parallel mycelial dry weight of samples were measured and all the media were assayed by high-pressure liquid chromatography (HPLC) for aflatoxinB1 (AFB1), aflatoxinB2 (AFB2), aflatoxinG1 (AFG1), aflatoxinG2 (AFG2) and aflatoxin total (AFTotal) production. The results showed that...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zataria multiflora; Reverse transcription-polymerase chain reaction; Aflatoxin; Aspergillus parasiticus.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822013000200045

The application of PCR in the detection of mycotoxigenic fungi in foods
Provedor de dados: 58
Autores: Konietzny,Ursula; Greiner,Ralf.
It is estimated that 25 to 50% of the crops harvested worldwide are contaminated with mycotoxins. Because of the toxic and carcinogenic potential of mycotoxins, there is an urgent need to develop detection methods that are rapid and highly specific. The highly advanced physico-chemical methods for the analysis of mycotoxins in use, have the disadvantage that highly sophisticated clean-up and/or derivatization procedures must be applied. An alternative could be the detection of the mycotoxigenic moulds themselves, especially as molecular techniques have been introduced recently as powerful tools for detecting and identifying fungi. PCR methods for the detection of aflatoxigenic Aspergilli, patulin-producing Penicillum and trichothecene- as well as...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aflatoxin; Fumonisin; Patulin; Polymerase chain reaction; Trichothecene.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822003000400001

Distribution of aflatoxins in contaminated corn fractions segregated by size
Provedor de dados: 58
Autores: Piedade,Fabiana S.; Fonseca,Homero; Glória,Eduardo M.; Calori-Domingues,Antonia; Piedade,Sônia M.S.; Barbin,Décio.
The efficiency of segregation, by particle size, in reducing the aflatoxin content of corn lots under the Brazilian conditions was studied. The aflatoxin content, in the corn fractions obtained after sieving thirty contaminated samples, with approximately 3.0 kg each, was determined. The samples were passed through 4.5 mm round-hole sieves and the fractions with particles ³4.5 mm (fraction A) and &lt;4.5 mm (fraction B) and then analyzed for aflatoxins by TLC. The results showed that the distribution of the aflatoxins among the fractions A and B varied from sample to sample. However, the fraction B presented higher content (6 to 1,422 µg/kg) of aflatoxins (P&lt;5%), than samples of fraction A (4 to 389 µg/kg). In spite of that the segregation of this...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aflatoxin; Corn; Contamination distribution; Segregation; Fractions.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822002000100002

Toxigenic fungi in beans (Phaseolus vulgaris L.) classes black and color cultivated in the State of Santa Catarina, Brazil
Provedor de dados: 58
Autores: Costa,Léa Luzia Freitas; Scussel,Vildes Maria.
Toxigenic fungi were studied in beans (Phaseolus vulgaris L.) of Classes black and color, cultivated in different regions of the State of Santa Catarina, south region of Brazil. The mean counts of filamentous fungi were 2.8 x 103 and 6.7 x 103 CFU/g for beans Classes black and color, respectively. Penicillium spp., Aspergillus spp. and Phoma spp. were the most frequent genera isolated, followed by Ryzopus spp., Alternaria spp., Helminthosporium spp., Cladosporium spp., Botrytis spp., Fusarium spp., Trichoderma spp., Curvularia spp. and Dreschelera spp. Among beans Class black, 24.6% of the Aspergillus strains produced mycotoxins: 13.1% produced aflatoxins (AFs); 11.5% produced ochratoxin A (OTA) and 28.9% of Penicillium produced citrinin (CTR). On the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Beans; Phaseolus; Toxigenic fungi; Aflatoxin; Ochratoxin A; Citrinin.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822002000200008

Inhibitory activity of compounds isolated from Polymnia sonchifolia on aflatoxin production by Aspergillus flavus
Provedor de dados: 58
Autores: Pak,Adriana; Gonçalez,Edlayne; Felicio,Joana D'arc; Pinto,Marina Mori; Rossi,Maria Helena; Simoni,Isabela Cristina; Lopes,Márcia Nasser.
Polymnia sonchifolia, commonly known as ";yacon";, was originally cultivated at Andes moutains in South America. Recently, the specie attracted worldwide attention because of its wide range of uses, for example in the control of diabetes melitus, besides the antifungal and pesticidal compounds were found in the leaves. This study describes the identification of two flavonoids: 3', 5, 7 trihydroxy-3, 4'-dimethoxyflavone (compound 1) and 3', 4', 5- trihydroxy-7-methoxy flavanone (compound 2) and two sesquiterpenes lactones: enhydrin (compound 3) and a mixture of enhydrin and uvedalin (compound 4) isolated from Polymnia sonchifolia leaves and their effects on the aflatoxin production by Aspergillus flavus. The identification of the compounds were achieved by...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Polymnia sonchifolia; Flavonoids; Melampolides; Aflatoxin; Aspergillus flavus.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822006000200018

Immobilized Saccharomyces cerevisiae as a potential aflatoxin decontaminating agent in pistachio nuts
Provedor de dados: 58
Autores: Rahaie,S.; Emam-Djomeh,Z.; Razavi,S. H.; Mazaheri,M.
In this study, we investigated the binding ability of Saccharomayces cerevisiae to aflatoxin in pistachio nuts. The obtained results indicate that S. cerevisiae has an aflatoxin surface binding ability of 40% and 70% (with initial aflatoxin concentrations of 10 and 20 ppb) in the exponential phase. Acid treatments increase this ability to approximately 60% and 73% for the two concentrations of aflatoxin, respectively. Heat treatments also enhance surface binding to 55% and 75%, respectively. Binding appears to be a physical phenomenon that saturates within the first 2-3 hours of the process. The obtained results indicate that yeast immobilization for toxin reduction on aflatoxin-contaminated pistachios had no effect on qualitative characteristics, such as...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aflatoxin; Pistachio nut; Saccharomayces cerevisiae; Surface binding.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822010000100014

Sampling plan for the analysis of aflatoxin in peanuts and corn: an update
Provedor de dados: 58
Autores: Fonseca,Homero.
The aim of this paper was to update the sampling plan for analysis of mycotoxins in grains, formerly published by the author. The proposed alterations were based on the acquired experience on its application and on FAO recommendations. This update restricts the scope of the former plan and establishes a sampling plan for analysis of aflatoxin in peanuts and corn, by means of modified formulas, the minimum number of sacks or points (when in bulk) from which incremental samples should be drawn to make a bulk sample. Fractional exponents (square roots) of the formulas proportionally decrease the number of sacks/points to be sampled as the lot size increases. Operating Characteristic (OC) curves developed for in-shell and shelled peanuts and corn as well as...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sampling; Peanuts; Corn; Aflatoxin; Analysis.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822002000200001

Risk assessment of the occurrence of aflatoxin and fungi in peanuts and cashew nuts
Provedor de dados: 60
Autores: Kujbida,Paula; Maia,Patrícia Penido; Araújo,Ariadne Naama de; Mendes,Leonardo Daniel; Oliveira,Mariana Lepri de; Silva-Rocha,Walicyranison Plinio; Brito,George Queiroz de; Chaves,Guilherme Maranhão; Martins,Isarita.
In the present study, the occurrence of fungi and aflatoxins (AFs) in peanut and cashew nut samples was investigated. Mycological analysis revealed the presence of fungi in 58.8% of samples, and assessment of AFs by chromatographic methods revealed that 52.9% were contaminated by AFs. AFB1 was the principal component in all AF-contaminated samples, with a mean level of 14.0, and 1.08 µg/kg in peanut and cashew nut, respectively. Eleven samples (32.4%) exceeded the total AF maximum level (4 μg/kg) and 8 samples (23.5%) exceeded the AFB1 (2 μg/kg) established by the European Commission. Our findings suggest that the incidence of AFs emphasizes the need for regular monitoring and a more stringent food safety system to control AFs at the lowest possible levels...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aflatoxin; Peanut; Cashew nut; Fungi; Risk assessment.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502019000100502

Identification of toxigenic Aspergillus species from diet dairy goat using a polyphasic approach
Provedor de dados: 65
Autores: Silva,Janaina Lara da; Aparecido,Christiane Ceriani; Hansen,Daiane; Pereira,Tacila Alves Muniz; Felicio,Joana D'arc; Gonçalez,Edlayne.
Some species of filamentous fungi that infest agricultural commodities are able to produce mycotoxins, contaminating feed and animal products. The aim of this research was to identify the mycoflora present in the feed and forage for dairy goat and to isolate and characterize the Aspergillus flavusand A. parasiticusstrains based on a morphological and molecular characterization and mycotoxigenic ability. The goat dairy diets were collected monthly from 11 goat milk farms, totaling 129 and 106 samples of concentrate and forage, respectively. For the isolation of the mycobiota the surface plating method was used. Aspergillus, Penicillium,and Fusariumwere the main fungi producing mycotoxins isolated. The morphological and molecular characterization and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Toxigenic fungi; Aflatoxin; Cyclopiazonic acid; Feed; Molecular characterization.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000801466