What Is a Fusarium?
Fusarium is a fungus found in plants and affects crops like wheat, corn, and bananas, and significant agricultural losses. The food supplies are contaminated by the fusarium as it produces mycotoxins.
Is Fusarium Species the Main Contaminant in Cereal Crops?
On many different cereal crops across the globe ranging from wheat, maize, corn, oats, or other cereals, there are certain contaminated by-products that are released which are toxic in nature. These toxins tend to be released naturally owing to the climatic conditions, soil, and groundwater especially where the fungal species invade these crops or there is an attack by the Fusarium fungus species. These toxins are the target secondary metabolite products directly produced by Fusarium species contaminating different cereals with their presence and often these may be unavoidable to eliminate even when the crop is being harvested.
As part of the processing and decontamination chains in food industries, before the cereals are released into the farmers or commercial organic markets, the toxins need to be eliminated.
In several countries, these toxins still pose several safety issues especially in terms of cereal consumption, when these are not eliminated through the food processing chains. Let us look at the complexity of these different types of toxins in cereal crops and how they can be eliminated.
How Are These Toxic Compounds Classified?
Fusarial toxin molds can develop in different concentrations in the affected crops and are usually either briefly categorized as:
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Trichothecene compounds (divided into DON, T–2 or HT–2 toxin, and nivalenol).
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Fumonisin compounds (divided into FB1, FB2, FB3, and FB4).
Let us explore the important effects of these contaminating toxins in the food chain :
1. Deoxynivalenol (DON):
This fusarial toxin is produced by most Fusarium species in grain crops contaminating the fields, usually around the postharvest time period.
Other than the presence of DON, the grains may also be contaminated especially in peanut and maize crops in several countries like East Africa or in the developing countries, where mycotoxins are the most commonly reported and documented by researchers.
These groups of toxins include several contaminating compounds namely aflatoxins, fumonisins, zearalenone, and deoxynivalenol. (Structural formula C15H20O6, IUPAC name given 3α,7α,15-trihydroxy-12-13-epoxytrichothec-9-en-8one) pose the main risks directly to humans.
2. T–2 toxin:
(Also goes by the name of fusariotoxin T2, mycotoxin T2). This is a trichothecene fungal byproduct or an extremely poisonous toxin having a high scope for domestic use and human chain contamination.
T–2 toxicity is associated with several clinical repercussions like sudden nausea, vomiting, extreme diarrhea, reduced WBC count or leukopenia, sudden skin hemorrhaging, skin inflammation, or hives.
3. Nivalenol:
Nivalenol (NIV) is the other common fusarial toxin belonging to the trichothecene group which is one of the major contaminants of cereals and even commercial cereal products in developing countries, which raises safety concerns from nutrition experts. In specifically moist, damp, and cold temperatures, the fungal invasion by Fusarium species can be possible, with the NIV known to be a genotoxic human agent. This agent is also capable of causing severe oxidative stress and DNA damage, altering the overall cytokine compound expression and thereby the inflammatory pathway, predisposing individuals to exposure to fungal toxins directly through food.
4. Fumonisins:
These ads the direct secondary metabolites, that do not occur naturally (unlike the above-enlisted toxin types) and cases because of Fusarium species contaminating grapes, maize, and peanut crops commonly inducing potent liver toxic or kidney toxic (hepatic or renal toxic effects) in the human body.
Though in 95 percent of the food chains, commonly these contaminants would be eliminated in the post-harvest stage with decontaminating techniques - still the side effects reported by consumption of foods with fungal toxins continue to be a safety concern.
5. Aflatoxins:
These Fusarial toxins in cereals are mainly produced by the two types of Aspergillus infecting fungi, Aspergillus flavus and Aspergillus parasiticus. The metabolites can cause severe systemic stress, altering of cellular and lipid metabolism while also producing cardiotoxic effects in humans.
What Are the Clinical Repercussions?
The health complications usually associated with DON or other enlisted fungal toxins derived from Fusarium species as a result of food contamination through the normal food chain in humans are documented in medical literature as follows, with the given enlisted clinical symptoms:
- Affected patients after consuming the contaminants or toxins report acute headaches, severe nausea or vomiting, abdominal upset or cramping, sudden fatigue or tiredness, acute pyrexia, or high body temperature.
- Long-term health implications associated with systemic organ antagonism and negative impact on the human reproductive system have also been seen with the regular consumption of such contaminated crops.
What Is the Adverse Nature of DON or Vomitoxin?
DON is further colloquially known in medical literature as vomitoxin or the potent vomiting-inducing fungal and immunosuppression toxin. By severe suppression of the normal cellular and immune system activities, with the white blood cell count or leucocyte increase in your body, medical case reports have documented high mortality rates through DON or vomitoxin contamination in food chains for affected individuals.
Currently, food industry experts and nutritionists together have reported high success in the reduction of crops contaminated by DON such as peanuts, corn, maize, and so on. By adsorbing use of compounds like alginate or carboxymethyl cellulose sodium composite that is loaded with calcium or other beneficial fungal species decontamination like Alternaria alternata, Rhizopus microsporus var. rhizodiformis, Aspergillus oryzae species.
Conclusion
As the sensitized high-risk population groups such as lactating mothers, milking animals, infants, babies, younger children, and adolescents are more prone to exposure to such cereal-based contaminants, it is always wiser to choose a third party or local medical body-tested product as a consumer to avoid safety issues. Further thoroughly cooking and washing your grains before consumption can also prevent the risk of fungal contaminant exposure.
If you or your loved ones report symptoms clinically of fungal infection or allergy after food consumption, immediately report it to your healthcare professional or allergist. These fungal species of Fusarium species can be transmitted to the grain or cereal crops commonly through contaminated feed consumed by animals, thereby reaching humans indirectly through the food chain or even by direct contamination of the crops containing larger concentrations of fungal toxin compounds, which have not been eliminated in the post-harvest period and sold directly in commercial markets.
