On the one hand, he did mention coming into contact with insects that carried the disease, and some of the symptoms of acute and then chronic Chagas are mentioned in his writings. (Read more: https://revchilhistnat.biomedcentral.com/articles/10.1186/s40693-021-00104-4)

But others mention lactose intolerance as a plausible cause for his symptoms, too. (Read more: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1743237/pdf/v081p00248.pdf)