A new case of the New World blowfly has been identified just 84 km from Texas.

The United States Department of Agriculture (USDA) confirmed on Thursday (28) a new case of New World blowfly (NWS) in the Mexican state of Nuevo León, just 84 kilometers from Texas. This is the closest detection to the US to date. Although most outbreaks of the disease remain in southern Mexico, multiple infestations in cattle have been observed in states further north. According to USDA data, as of May 19, there were 156 active cases of NWS in Tamaulipas, 15 in Coahuila and 48 in Nuevo León. Due to the disease activity, the United States government suspended the import of live cattle from Mexico in May 2025, exacerbating the internal cattle supply crisis – the US cattle herd is at its lowest level in 75 years. Last November, the USDA inaugurated an aerial dispersal facility for sterile flies in Tampico, Mexico, to combat the disease; in February of this year, a new unit was implemented at Moore Air Force Base in Edinburgh, Texas. However, disease control is not proving 100% effective, given its spread closer to the border.

This text was translated by machine from Brazilian Portuguese.