A study of New World screwworm (NWS) myiasis cases in Mexico identified 202 cases, with 72% in male patients. Victims ranged from 12 to 93 years, with a mean age of 61. Most (77%) had underlying health conditions like diabetes, alcoholism, or cancers.

The lower limbs were the most common infestation site (55%), followed by head/neck. Six deaths were reported, but only one had NWS myiasis listed as the cause. The average age at death was 79.5 years.\n\nThe geographic distribution of human cases mirrored animal cases.

Researchers suggest occupational exposure, outdoor activities, and delayed healthcare may explain the male bias. They emphasize a One Health approach: "Because animal and human cases reflect northward spread of the NWS fly… surveillance, diagnostic preparedness, animal movement controls, and fly-suppression activities should be implemented proactively."\n\nThe US reported its first animal cases in Texas in June, with 45 animal cases since. No human NWS myiasis cases have been reported in the US from the resurgence, but travel-related cases have occurred from Central America and other endemic areas.