Health authorities in the state of Jalisco have issued a public health alert following an outbreak of the New World screwworm in Puerto Vallarta.
The situation is critical because the parasite can move from infected pets to humans, potentially causing severe tissue damage if not treated promptly.
The Secretaría de Salud de Jalisco is currently intensifying surveillance in the coastal city after detecting new cases of myiasis [1]. The parasite primarily affects animals, but officials have confirmed three human cases [2]. A fourth human case is currently suspected in Puerto Vallarta [2].
The impact on the local animal population has been more significant. Reports indicate between 30 [5] and 35 [2] confirmed cases in dogs. The discrepancy in total state-wide counts persists across reports, with some sources citing as few as four total cases [3], while others track the higher number of animal infections.
Health officials said that the parasite is being transmitted from infected pets to people. This transmission cycle has led to a push for intensified prevention advice for pet owners and residents in the affected region.
"Las autoridades de salud intensifican la vigilancia tras detectarse un nuevo caso de miasis en Puerto Vallarta," health authorities of Jalisco said [1].
To prevent further spread, authorities are advising residents to inspect their pets for wounds daily. Because the screwworm larvae feed on living tissue, early detection of open sores in dogs is essential to stop the parasite from migrating to human hosts. The state continues to monitor the region to prevent a wider epidemic within the livestock and pet populations.
“The parasite is being transmitted from infected pets to people.”
The emergence of New World screwworm in a high-traffic tourist destination like Puerto Vallarta poses a dual risk to the local economy and public health. Because the parasite can devastate livestock and transmit to humans via domestic pets, the outbreak necessitates a coordinated veterinary and medical response to prevent the parasite from becoming endemic in the region.
