Abstract
Practical applications
Shelled almonds have an atypical aflatoxin distribution that appears consistent with a combination of two distributions: first, infrequent highly contaminated nuts and second, a uniform low‐level aflatoxin contamination. This second distribution appears to come from cross‐contamination during postharvest processing, but this has not been previously tested. Results of this study confirmed that aflatoxin can transfer between contaminated nuts and uncontaminated nuts via simple mechanical mixing contact, as would occur during postharvest processing. Almond producers will want to take this finding into account when reviewing their processing and cleaning procedures and reduce any opportunity for nut to nut cross‐contamination by removing contaminated nuts as early as possible and routinely cleaning processing equipment.



