New World Screwworm: Outbreak Moves into Northern Mexico. Distributed via the CDC Health Alert Network
January 20, 2026, 12:30 PM ET
CDCHAN-00526
𝐖𝐡𝐚𝐭 𝐭𝐨 𝐤𝐧𝐨𝐰 :
Currently, the New World screwworm (NWS) fly is not present in the United States and there are no cases of NWS in the United States.
Recently, Mexico and countries in Central America have been experiencing an outbreak of NWS.
In the outbreak region, NWS is primarily infesting livestock, wildlife, and pets. However, there are also cases of NWS in people.
Infestations by NWS maggots can cause painful and foul-smelling wounds. If not caught early and treated, it can lead to extensive tissue damage, and potentially death.
The Centers for Disease Control and Prevention (CDC) is issuing this Health Alert Network (HAN) Health Advisory to share information and notify clinicians, public health authorities, and the public about recent New World screwworm (NWS) animal cases in the Mexican state of Tamaulipas, which shares a border with the U.S. state of Texas.
This is very interesting—if you would like to read the entire advisory click here: https://www.cdc.gov/han/php/notices/han00526.html


