Fusarium pallidoroseum in maize samples of three agro-ecological zones of Cameroon

Tagne, Appolinaire; Kongsdal, O.; Ngoko, Z.; The, C.; Mathur, S. B.

doi:10.1016/s0022-474x(02)00031-0

Cited by 8 publications

(3 citation statements)

References 13 publications

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“…However, this is not the case for Cameroon, owing to the limited data available on the incidence of mycotoxins and associated health disorders. Moreover, the data on food quality with respect to mycotoxin contamination are restricted to maize, as evidenced in the studies of Cardwell (1999), Ngoko (1999), Ngoko et al (2001) and Tagne et al (2003). The main objective of this study was to determine the incidence and levels of mixtures of mycotoxins in food commodities from Cameroon.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous occurrence of mycotoxins in human food commodities from Cameroon

et al. 2009

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Eighty-two samples of dried food commodities from Cameroon were screened and quantified for different mycotoxins, including fumonisin B1 (FB1), zearalenone (ZEA), deoxynivalenol (DON), aflatoxin (AF) and ochratoxin A (OTA), by thin-layer chromatography (TLC) and high-performance liquid chromatography (HPLC), respectively. The percentage of positive samples was as follows: FB1 41%, AF 51%, ZEA 57%, DON 65% and OTA 3%. High FB1 contents were found in maize, averaging 3,684 µg/kg (range: 37-24,225 µg/kg), whereas the highest average ZEA level was found in peanuts (70 µg/kg), followed by maize (69 µg/kg), rice (67 µg/kg) and beans (48 µg/kg) with no ZEA was detected in soybeans. DON contents were low, ranging from 13 to 273 µg/kg, and for AF the average content was 2.6 µg/kg with peanuts and maize as principal substrates. The incidence of OTA was low, with a mean level of 6.4 µg/kg recorded. The majority (79%) of samples contained more than one mycotoxin and the most frequent co-occurrence found was FB1 + ZEA + DON, detected in 21% of samples (mainly maize) analysed. Co-contamination with FB1 + ZEA + DON + AF was found in 11% of the samples. Although a large proportion of samples had fairly low levels of individual mycotoxins, this should be of concern as the co-occurrence of mycotoxins may generate additive or synergistic effect in humans, especially if the respective commodities are consumed almost on a daily basis.

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Section: Introductionmentioning

confidence: 99%

Simultaneous occurrence of mycotoxins in human food commodities from Cameroon

et al. 2009

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“…Since the year 2000, mycotoxin monitoring programs have been carried out in several West African countries such as Benin Republic and Togo. , No surveys were done in Cameroon until 1994, when the fungal diversity in different maize species was characterized for the first time. − The presence of leaf, stem, and ear diseases in maize production areas in Cameroon was also reported. , The first data on multimycotoxin occurrence in dietary staples was reported in 2001 . Trace levels of aflatoxin B 1 (AFB 1 ) were detected in a few samples, whereas quantifiable levels of deoxynivalenol (DON; <100–1300 μg/kg), fumonisin B 1 (FB 1 ; 300–26000 μg/kg), and ZEA (50–110 μg/kg) were reported in maize .…”

Section: Introductionmentioning

confidence: 99%

A Comprehensive Study To Explore Differences in Mycotoxin Patterns from Agro-ecological Regions through Maize, Peanut, and Cassava Products: A Case Study, Cameroon

Ediage

Hell

Saeger

2014

J. Agric. Food Chem.

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A total of 420 samples were collected from agrarian households. Whereas 51% (215/420) of the samples were contaminated with one or more toxins, the contamination rates for maize, peanut, and cassava products were 74, 62, and 24%, respectively. The fumonisins (20-5412 μg/kg), aflatoxin B1 (6-645 μg/kg), roquefortine C (1-181 μg/kg), and deoxynivalenol (27-3842 μg/kg) were the most prevalent contaminants in maize. For peanut samples, aflatoxin B1 (6-125 μg/kg) and ochratoxin A (0.3-12 μg/kg) were the main contaminants, whereas aflatoxin B1 (6-194 μg/kg) and penicillic acid (25-184 μg/kg) were detected in the cassava products. Exposures calculated through maize intake for fumonisin B1 and aflatoxin B1 were several-fold higher (2-5 for fumonisin B1 and 10(4)-10(5) for aflatoxin B1) than the health-based guidance values of 2 μg/kg bw/day and 0.15 ng/kg bw/day, respectively. The study design constitutes a good model that can be implemented in other sub-Saharan African countries.

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“…The species F. pallidoroseum is a soil fungus that survives on crop residues and is generally considered as a secondary colonizer of plant tissues. They may act as a pathogen, causing disease in adult plants and deterioration of maize and cotton seeds, consequently reducing germination rate (TAGNE et al, 2003;WHITT et al, 2014). The phytopathogen F. solani is cosmopolitan and can be found in several substrates; it is considered as a pathogen for many species of cultivated plants (LESLIE;SUMMERELL, 2006;AL-SADI et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Activity of essential oils of Lippia alba chemotypes and their major monoterpenes against phytopathogenic fungi

Peixoto¹,

Blank²,

Arrigoni-Blank³

et al. 2018

Biosci. J.

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This work aimed to evaluate the in vitro antifungal activity of the essential oils of L. alba belonging to the carvone chemotype (LA-13 and LA-57) and the citral chemotype (LA-10, LA-29, and LA-44); the carvone enantiomers (R)-(-)-carvone and (S)-(+)-carvone; and citral on phytopathogenic fungi Lasiodiplodia theobromae (LT), Fusarium pallidoroseum (FP) and Fusarium solani (FS). Concentrations of 0.01; 0.05; 0.1; 0.2; 0.3; 0.5 and 1.0 mL/100 mL were tested, and the percentage of mycelial growth inhibition (MGI) was calculated after 96h in relation to the control. Minimal Inhibitory Concentrations (MIC) and Minimal Fungicide Concentrations (MFC) were obtained for essential oils and compounds. From the concentration of 0.2 mL/100 mL, all the accessions and carvone enantiomers were effective against the fungus LT, except the accession LA-44, for which the maximum inhibition occurred from the concentration of 0.3 mL/100 mL. Citral was the most effective compound against LT, with 100% of MGI from the concentration of 0.05 mL /100 mL. All accessions and enantiomers caused 100% of MGI against FP fungus from the concentration of 0.2 mL/100 mL. Once again, citral stood out by providing the same result as the other treatments from the concentration of 0.1 mL/100 mL. Considering the fungus FS, carvone enantiomers and citral caused 100% of MGI from the concentration of 0.1 mL/100 mL while all accessions caused 100% of MGI from the concentration of 0.2 mL/100 mL. Citral and carvone enantiomers presented the lowest MIC values (0.1 mL/100 mL) against FS fungus. The MIC of citral for LT and FP were not determined at the concentrations tested. (R)-(-)-carvone enantiomer presented the lowest MIC (0.1 mL/100 mL) for the LT fungus. Most of the other accessions presented MIC of 0.2 mL/100 mL for the three fungi. In relation to the minimum fungicidal concentration (MFC), citral stood out with values from 0.05 mL/100 mL (LT). Citral and carvone presented the same MFC for FS (0.2 mL / 100 mL). The other accessions showed MFC values from 0.3 mL/100 mL for the three fungi. Essential oils of L. alba accessions, carvone enantiomers, and citral were efficient in phytopathogen control and could be considered as an alternative to fungicides for presenting inhibitory and fungicidal effect against these microorganisms at low concentrations.

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Fusarium pallidoroseum in maize samples of three agro-ecological zones of Cameroon

Cited by 8 publications

References 13 publications

Simultaneous occurrence of mycotoxins in human food commodities from Cameroon

Simultaneous occurrence of mycotoxins in human food commodities from Cameroon

A Comprehensive Study To Explore Differences in Mycotoxin Patterns from Agro-ecological Regions through Maize, Peanut, and Cassava Products: A Case Study, Cameroon

Activity of essential oils of Lippia alba chemotypes and their major monoterpenes against phytopathogenic fungi

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