Authorities have reported a sharp rise in cases of flesh-eating screw worms in animals, with infections increasing by 53 percent over the past month, according to government data.

The parasite, which has been advancing northward, is now moving closer to the United States border.

Mexican government figures show that as of August 17, there were 5,086 recorded cases, including 649 active ones. The outbreak has been detected primarily in cattle, but infections have also been reported in horses, sheep, and dogs.

Human cases have also been recorded. Mexican media report that the country has confirmed 41 infections over the past year, mostly in Chiapas State. In the United States, the first human case was confirmed on August 4 in Maryland, involving a patient who had recently traveled to El Salvador.

Health officials warn that the spread of the parasite poses risks for both animal health and human safety as it continues to advance northward.