As everyone mentioned earlier, fungus produces toxins moreover the spores they produce could block the air passage in nostrils. The effects in blockage of air will never be abrupt but severe once it gets along. It could be fatal too. The handling of fungus must be good enough to prevent its outbreak. So most food industries expose the raw material/ intermediate product to such high temperatures to suppress the growth. If the higher temperature affects the quality of food product, it is better not to use fungus and try some other bacteria that serves the purpose as most bacteria are mesophile.