All of the following have been associated with methyl mercury poisoning except:

Methyl mercury poisoning is primarily associated with the consumption of certain seafood, particularly fish. Tuna is known to accumulate high levels of methyl mercury in its tissues due to its position as a larger predator fish. This accumulation occurs because methyl mercury is found in the aquatic food chain, and larger, long-lived fish like tuna tend to have higher concentrations.

In contrast, the other options are less likely to be associated with methyl mercury poisoning. Bread and pork do not typically have significant levels of methyl mercury since they are not part of the aquatic ecosystem where methyl mercury accumulates. Fungicides may contain various chemicals, but they are not specifically linked to methyl mercury exposure.

Therefore, tuna is indeed associated with methyl mercury poisoning due to its high levels of accumulation, making it the least correct choice in this context regarding which has NOT been associated with methyl mercury poisoning.