From https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5496604/#:~:text=The majority of malaria cases,(19%) [1].
"The majority of malaria cases in South America occur in the Amazon region. In 2015, the four countries reviewed here accounted for 83% of malaria cases in the Americas: Brazil (24%), Bolivarian Republic of Venezuela (30%), Colombia (10%), and Peru (19%) [1]."
Good advice to seek professional qualified medical advice. There are several strains of malaria. Some are resistant to medication, Cloroquine in particular.