Adverse Health Effects Associated with the Consumption of Macrocybe titans (Agaricomycetes) from Brazil: A Case Report

Mushrooms are an important source of food for animals. However, some species produce toxic compounds for humans. Moreover, some people can experience adverse health effects even when the consumed species is edible. Macrocybe titans, commonly known as the giant-mushroom, is a Neotropical species eaten by traditional and urban groups of people. In January 2022, a dinner meal was prepared using wild mushrooms of M. titans collected in a lawn in the urban area of Sorocaba (State of São Paulo, Southeastern Brazil). Some of the people who attended the dinner experienced adverse health effects (headache, nausea, abdominal pain, diarrhea, and vomiting) three to eight hours after the consumption of the mushrooms. Fortunately, none of them were hospitalized, and we believe that symptoms were caused due to a combination of factors. This work aims to report for the first time in literature the occurrence of adverse health effects after consuming M. titans.