Summary: mapping the spread of a dangerous parasite Angiostrongylus cantonensis, the rat lungworm, is an emerging zoonotic threat linked to eosinophilic meningitis in humans. A comprehensive field study conducted in four Philippine provinces (Agusan del Sur, Davao del Sur, Laguna, and Surigao del Norte) reveals substantial prevalence of Angiostrongylus spp. in wild rats, including evidence…