There are several theories as to what set off Candida auris, a newly-resistant fungus now becoming more prevalent across the planet. According to the research of Dr. Jacques Meis, a microbiologist living in the Netherlands, the rise of Candida auris is related to the increasingly prevalent use of agressive fungicides in farms and gardens.
Meis believes when farmers and gardeners apply fungicides to their fields and flowerbeds they are also making mild strains of fungi far more agressive in response. He cites a similar phenomenon that occured in 2013 when another soil-born fungus called Aspergillus suddenly began to appear in gardens, fields, and also hospitals where fungicides had recently been applied. He now believes the same response is occuring with Candida auris.
Fungi are intelligent. They can learn to adapt to hostile environments much as bacteria can become tolerant to antibiotics. The widespread use of aggressive fungicides in agriculture is having a drastic impact on the nature of soil-based organisms.