New World Screwworm: Outbreak Moves into Northern Mexico [January 20, 2026, 12:30 PM ET]

Details

• Corporate Authors:
  Centers for Disease Control and Prevention (U.S.). Health Alert Network (HAN)
• Description:
  CDCHAN-00526: Summary: 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. No NWS infestations related to this outbreak have been identified in people or animals in the United States as of January 20, 2026. However, given the potential for geographic spread, CDC is issuing this Health Advisory to increase awareness of the outbreak and to summarize CDC recommendations for clinicians and health departments in the United States on case identification and reporting, specimen collection, diagnosis, and treatment of NWS, as well as guidance for the public.
• Content Notes:
  Notice of Possible Alert Expiration: The CDC Health Alert, Advisory, Update, and Info Service announcements, distributed by the Health Alert Network (HAN), were active on the date they were originally published. Publication dates have been added to Titles for clarity. A CDC Health Alert, Advisory, Update, and Info Service announcement may expire at any time. They may also be updated or superseded according to later developments. None of the CDC Health Alert, Advisory, Update, or Info Service announcements in the Stacks HAN Collection should be assumed to be current or active. Stacks preserves HAN announcements in order to maintain a record of past CDC actions. Stacks in not designed for up-to-the-minute notifications. For the list of current CDC Health Alert, Advisory, Update, or Info Service announcements, patrons should visit the Health Alert Network (HAN) webpage at https://www.cdc.gov/han/php/about/index.html. For up to the minute reports, subscribe to the HAN email alert system hosted by CDC News & Updates at https://tools.cdc.gov/campaignproxyservice/subscriptions.aspx?topic_id=USCDC_486
  
  Categories of Health Alert Network (HAN) messages:
  
  Health Alert: Requires immediate action or attention, highest level of importance.
  
  Health Advisory: May not require immediate action; provides important information for a specific incident or situation.
  
  Health Update: Unlikely to require immediate action; provides updated information regarding an incident or situation.
  
  HAN Info Service: Does not require immediate action; provides general public health information.
  
  
• Subjects:
  Disaster Planning Emergencies Health Communication Screw Worm Infection
• Keywords:
  Advisories Alerts Gusano Barrenador Del Nuevo Mundo HAN Health Alert Network New World Screwworm NWS Updates
• Series:
  Health Alert Network
• Subseries:
  CDC Health Advisory
• Publisher:
  Centers for Disease Control and Prevention (CDC) (U.S.)
• Document Type:
  Text
• Genre:
  Alert
• Place as Subject:
  Mexico ; Tamaulipas, Mexico
• Rights:
  Public Domain
• CIO:
  Office of Emergency Risk Communication (OERC)
• Pages in Document:
  5 pdf pages
• Issue:
  526
• Collection(s):
  Health Alert Network (HAN)
• Main Document Checksum:
  urn:sha-512:5f3422095007ec4691736c16f87a12a857ec475e77636249691c781d4a7702867270da7af18b351a0dbb5ae07a461e5f722ad881e2cac05eaa5c9140b5d735d3
• Download URL:
  https://stacks.cdc.gov/view/cdc/255126/cdc_255126_DS1.pdf
• File Type:
  [PDF - 415.71 KB ]