Immunotoxicity of mycotoxins

Area of Science:

• Immunotoxicology
• Veterinary Immunology

Background:

• The immune system defends against pathogens, but mycotoxins can disrupt these responses.
• Most mycotoxin immunotoxicity data comes from lab animals, with limited research on livestock.
• Dairy cattle are rarely used due to variability and cost, necessitating alternative models.

Purpose of the Study:

• To review the effects of mycotoxins on immune responses in various animal species.
• To highlight the immunotoxic potential of specific mycotoxins like aflatoxin B1, trichothecenes, and ochratoxin A.
• To discuss the implications for livestock health and analytical methods.

Main Methods:

• Literature review of studies investigating mycotoxin effects on immune systems.
• Analysis of data from livestock (turkeys, chickens, pigs, sheep, calves) and laboratory animals (mice, guinea pigs, rabbits).
• In vitro studies on bovine lymphocytes exposed to mycotoxins.

Main Results:

• Aflatoxin B1 causes immunosuppression in multiple livestock and lab animal species.
• Trichothecenes (e.g., T-2 toxin) induce leukopenia and impair lymphocyte function in sheep and calves.
• Other mycotoxins like ochratoxin A, rubratoxin B, patulin, and citrinin also exhibit immunosuppressive or lymphopenic effects.

Conclusions:

• Mycotoxins pose a significant threat to the immune systems of both livestock and laboratory animals.
• Understanding species-specific responses is crucial for assessing risks and developing mitigation strategies.
• Antibody production aids in mycotoxin detection and analysis.