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Abstract
The challenge of feeding the current and future world population is widely recognized, and the management of plant diseases has an important role in overcoming this. This paper explores the ways in which international plant pathology has contributed and continues to support efforts to secure adequate, safe and culturally appropriate nourishment and livelihoods for present and future generations. For the purposes of this paper, "international plant pathology" refers to the work that plant pathologists do when they work across international borders, with a focus on enhancing food security in tropical regions. Significant efforts involve public and philanthropic resources from the global North for addressing plant disease concerns in the global South, where food security is a legitimate and pressing concern. International disease management efforts are also aimed at protecting domestic food security, for example when pathogens of major staples migrate across national borders. In addition, some important crops are largely produced in tropical countries and consumed globally, including in industrialized countries; the diseases of these crops are of international interest, and they are largely managed by the private sector. Finally, host-microbe interactions are fascinating biological systems, and basic research on plant diseases of international relevance has often yielded insights and technologies with both scientific and practical implications.
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Affiliation(s)
- Rebecca Nelson
- School of Integrative Plant Sciences, Cornell University
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Kamala A, Kimanya M, Lachat C, Jacxsens L, Haesaert G, Kolsteren P, Ortiz J, Tiisekwa B, De Meulenaer B. Risk of Exposure to Multiple Mycotoxins from Maize-Based Complementary Foods in Tanzania. J Agric Food Chem 2017; 65:7106-7114. [PMID: 28830150 DOI: 10.1021/acs.jafc.6b03429] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
This study estimated exposure to multiple mycotoxins in 249 infants aged between 6 and 12 months in three agro-ecological zones of Tanzania. Maize-based complementary food intakes were estimated using two 24 h dietary recalls. Using @Risk software, probabilistic exposure assessment was conducted by modeling maize intake data (kg/kg body weight/day) with previously determined multiple mycotoxin (except for ochratoxin A (OTA) and zearalenone (ZEA), present in only a few samples) contamination data (μg/kg) in maize. Maize intakes ranged from 0.13 to 185 g/child/day (average = 59 ± 36 g/child/day). The estimated mean exposures were higher for aflatoxins (6-fold), fumonisins (3-fold), and deoxynivalenol (2-fold) than health-based guidance values of 0.017 ng/kg body weight/day, 2 μg/kg body weight/day, and 1 μg/kg body weight/day, respectively. The population at risk of exposures above the limits of health concern ranged from 12% for HT-2 toxin through 35% for deoxynivalenol to 100% for aflatoxins. The exposure varied among the agro-ecological zones. Strategies targeting multiple mycotoxins in maize are urgently needed to minimize exposures in Tanzania.
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Affiliation(s)
- Analice Kamala
- nutriFOODchem unit, Department of Food Safety and Food Quality, partner in Food2Know, Faculty of Bioscience Engineering, Ghent University , Coupure Links 653, 9000 Ghent, Belgium
- Directorate of Food Safety, Tanzania Food and Drugs Authority , P.O. Box 77150, Dar es Salaam, Tanzania
| | - Martin Kimanya
- School of Life Sciences and Bio-Engineering, The Nelson Mandela African Institution of Science and Technology (NM-AIST) , P.O. Box 447, Arusha, Tanzania
| | - Carl Lachat
- nutriFOODchem unit, Department of Food Safety and Food Quality, partner in Food2Know, Faculty of Bioscience Engineering, Ghent University , Coupure Links 653, 9000 Ghent, Belgium
| | - Liesbeth Jacxsens
- nutriFOODchem unit, Department of Food Safety and Food Quality, partner in Food2Know, Faculty of Bioscience Engineering, Ghent University , Coupure Links 653, 9000 Ghent, Belgium
| | - Geert Haesaert
- Department of Applied Biosciences, Faculty of Bioscience Engineering, Ghent University , Valentin Vaerwyckweg 1, BE-9000 Ghent, Belgium
| | - Patrick Kolsteren
- nutriFOODchem unit, Department of Food Safety and Food Quality, partner in Food2Know, Faculty of Bioscience Engineering, Ghent University , Coupure Links 653, 9000 Ghent, Belgium
| | - Johana Ortiz
- nutriFOODchem unit, Department of Food Safety and Food Quality, partner in Food2Know, Faculty of Bioscience Engineering, Ghent University , Coupure Links 653, 9000 Ghent, Belgium
- Department of Biosciences, Faculty of Chemical Sciences, Cuenca University , Av. 12 de Abril s/n Cdla, Universitaria, 010201 Cuenca, Ecuador
| | - Bendantuguka Tiisekwa
- College of Agriculture, Sokoine University of Agriculture , P.O. Box 3005, Morogoro, Tanzania
| | - Bruno De Meulenaer
- nutriFOODchem unit, Department of Food Safety and Food Quality, partner in Food2Know, Faculty of Bioscience Engineering, Ghent University , Coupure Links 653, 9000 Ghent, Belgium
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Hove M, De Boevre M, Lachat C, Jacxsens L, Nyanga L, De Saeger S. Occurrence and risk assessment of mycotoxins in subsistence farmed maize from Zimbabwe. Food Control 2016. [DOI: 10.1016/j.foodcont.2016.04.038] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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Kamala A, Kimanya M, Haesaert G, Tiisekwa B, Madege R, Degraeve S, Cyprian C, De Meulenaer B. Local post-harvest practices associated with aflatoxin and fumonisin contamination of maize in three agro ecological zones of Tanzania. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2016; 33:551-9. [DOI: 10.1080/19440049.2016.1138546] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Matumba L, Van Poucke C, Njumbe Ediage E, Jacobs B, De Saeger S. Effectiveness of hand sorting, flotation/washing, dehulling and combinations thereof on the decontamination of mycotoxin-contaminated white maize. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2015; 32:960-9. [DOI: 10.1080/19440049.2015.1029535] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Kimanya ME, Shirima CP, Magoha H, Shewiyo DH, De Meulenaer B, Kolsteren P, Gong YY. Co-exposures of aflatoxins with deoxynivalenol and fumonisins from maize based complementary foods in Rombo, Northern Tanzania. Food Control 2014; 41:76-81. [DOI: 10.1016/j.foodcont.2013.12.034] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Kimanya ME, De Meulenaer B, Van Camp J, Baert K, Kolsteren P. Strategies to reduce exposure of fumonisins from complementary foods in rural Tanzania. Matern Child Nutr 2012; 8:503-11. [PMID: 22044455 PMCID: PMC6860554 DOI: 10.1111/j.1740-8709.2011.00337.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Abstract
Feeding infants with maize can expose them to fumonisin mycotoxins. We assessed fumonisin exposure from complementary foods in rural Tanzania and determined strategies to reduce the exposure. We conducted a cross-sectional study in four villages of Tarakea division, Northern Tanzania. We used a repeat 24-hour dietary recall to collect data of maize consumption as complementary food for 254 infants aged 6-8 months. Fumonisin concentrations in the maize were also estimated. Fumonisin exposure was assessed using @risk analysis software. With the software, several maximum fumonisin contamination and maize consumption patterns were combined in order to determine effective strategies for minimizing fumonisin exposure. Of the infants, 89% consumed maize at amounts up to 158g/person/day (mean; 43g/person/day±28). The maize was contaminated with fumonisins at levels up to 3201µgkg(-1) . Risk of fumonisin intake above the provisional maximum tolerable daily limit of 2µgkg(-1) body weight was 15% (95% confidence interval; 10-19). The risk was minimized when the maximum contamination was set at 150µgkg(-1) . The risk was also minimized when the maximum consumption was set at 20g/child/day while keeping the maximum contamination at the European Union (EU) maximum tolerated limit (MTL) of 1000µgkg(-1) . Considering the economical and technological limitations of adopting good agricultural practices in rural Tanzania, it is practically difficult to reduce contamination in maize to 150µgkg(-1) . We suggest adoption of the EU MTL of 1000µgkg(-1) for fumonisins in maize and reduction, by replacement with another cereal, of the maize component in complementary foods to a maximum intake of 20g/child/day.
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Affiliation(s)
| | - Bruno De Meulenaer
- Department of Food Safety and Food Quality, Ghent University, Ghent, Belgium
| | - John Van Camp
- Department of Food Safety and Food Quality, Ghent University, Ghent, Belgium
| | - Katleen Baert
- Department of Food Safety and Food Quality, Ghent University, Ghent, Belgium
| | - Patrick Kolsteren
- Department of Food Safety and Food Quality, Ghent University, Ghent, Belgium
- Nutrition and Child Health Unit, Department of Public Health, Prince Leopold Institute of Tropical Medicine, Antwerpen, Belgium
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Feng YZ, Lu XH, Tao B, Pang MH, Liu YC, Dong JG. Natural occurrence of fumonisins b1 and b2 in corn from three main production provinces in China. J Food Prot 2011; 74:1374-8. [PMID: 21819670 DOI: 10.4315/0362-028x.jfp-11-103] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
A total of 255 corn samples collected in 2010 from three main corn production provinces of China (Liaoning, Shandong, and Henan) were analyzed for contamination with fumonisins (FB(1) and FB(2)). The incidence of contamination was significantly higher in samples from Liaoning than in samples from the other two provinces. Approximately 80.0% of the samples from Liaoning were contaminated with fumonisins, with a mean total fumonisin concentration of 3,990 ng/g. In contrast, the mean total fumonisin concentrations were 845 and 665 ng/g in samples from Shandong and Henan, respectively. The probable daily intake of fumonisins (0.3 μg/kg of body weight) is within the provisional maximum tolerable daily intake of 2.0 μg/kg of body weight set by the Joint Food and Agriculture Organization and World Health Organization Expert Committee on Food Additives.
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Affiliation(s)
- Y Z Feng
- College of Plant Protection Agricultural University of Hebei, Baoding, Hebei 071001, China
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van der Westhuizen L, Shephard GS, Rheeder JP, Burger HM, Gelderblom WCA, Wild CP, Gong YY. Simple intervention method to reduce fumonisin exposure in a subsistence maize-farming community in South Africa. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2011; 27:1582-8. [PMID: 20835935 DOI: 10.1080/19440049.2010.508050] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
In the Centane magisterial area of South Africa, high rates of oesophageal cancer have been associated with home-grown maize contaminated with fumonisins. The aim of this study was to implement a simple intervention method to reduce fumonisin exposure in a subsistence-farming community. The hand-sorting and washing procedures, based on traditional maize-based food preparation practices, were previously customised under laboratory-controlled conditions. Home-grown maize and maize-based porridge collected at baseline were analysed for fumonisin B(1), B(2) and B(3). The geometric mean (95% confidence interval) of fumonisin contamination in the home-grown maize at baseline was 1.67 (1.21-2.32) mg kg(-1) and 1.24 (0.75-2.04) mg kg(-1) (dry weight) in the porridge. Fumonisin exposure was based on individual stiff porridge consumption and the specific fumonisin levels in the porridge (dry weight) consumed. Porridge (dry weight) consumption at baseline was 0.34 kg day(-1) and fumonisin exposure was 6.73 (3.90-11.6) µg kg(-1) body weight day(-1). Female participants (n = 22) were trained to recognise and remove visibly infected/damaged kernels and to wash the remaining maize kernels. The discarded kernels represented 3.9% by weight and the fumonisins varied from 17.1 to 76.9 mg kg(-1). The customised hand-sorting and washing procedures reduced fumonisin contamination in the maize and porridge by 84 and 65%, respectively. The intervention reduced fumonisin exposure by 62% to 2.55 (1.94-3.35) µg kg(-1) body weight day(-1). This simple intervention method has the potential to improve food safety and health in subsistence-farming communities consuming fumonisin-contaminated maize as their staple diet.
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van der Westhuizen L, Shephard GS, Burger HM, Rheeder JP, Gelderblom WCA, Wild CP, Gong YY. Fumonisin B1 as a urinary biomarker of exposure in a maize intervention study among South African subsistence farmers. Cancer Epidemiol Biomarkers Prev 2011; 20:483-9. [PMID: 21266524 DOI: 10.1158/1055-9965.epi-10-1002] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND The consumption of maize highly contaminated with carcinogenic fumonisins has been linked to high oesophageal cancer rates. The aim of this study was to validate a urinary fumonisin B1 (UFB1) biomarker as a measure of fumonisin exposure and to investigate the reduction in exposure following a simple and culturally acceptable intervention. METHODS At baseline home-grown maize, maize-based porridge, and first-void urine samples were collected from female participants (n=22), following their traditional food practices in Centane, South Africa. During intervention the participants were trained to recognize and remove visibly infected kernels, and to wash the remaining kernels. Participants consumed the porridge prepared from the sorted and washed maize on each day of the two-day intervention. Porridge, maize, and urine samples were collected for FB1 analyses. RESULTS The geometric mean (95% confidence interval) for FB1 exposure based on porridge (dry weight) consumption at baseline and following intervention was 4.84 (2.87-8.14) and 1.87 (1.40-2.51) μg FB1/kg body weight/day, respectively, (62% reduction, P<0.05). UFB1C, UFB1 normalized for creatinine, was reduced from 470 (295-750) at baseline to 279 (202-386) pg/mg creatinine following intervention (41% reduction, P=0.06). The UFB1C biomarker was positively correlated with FB1 intake at the individual level (r=0.4972, P<0.01). Urinary excretion of FB1 was estimated to be 0.075% (0.054%-0.104%) of the FB1 intake. CONCLUSION UFB1 reflects individual FB1 exposure and thus represents a valuable biomarker for future fumonisin risk assessment. IMPACT The simple intervention method, hand sorting and washing, could positively impact on food safety and health in communities exposed to fumonisins.
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