
First West Coast foothold of rat lungworm detected in San Diego wildlife
San Diego County wildlife have tested positive for rat lungworm (Angiostrongylus cantonensis) for the first time west of Texas, starting with a Parma wallaby at the San Diego Zoo in December 2024; subsequent testing found infections in 3 of 64 dead wild rats and in 7 of 10 Virginia opossums, suggesting the parasite may be endemic in the area with potential spread to the western United States. Public health officials urge precautions, including washing produce and avoiding raw or undercooked snails or slugs.






