Important Information on New World Screw Worm

Screw Worm Larvae

Screw Worm Larvae

TO: Florida Livestock Industry Leaders and Partners

FROM : Ned Waters, President, Florida Cattlemen’s Association

I write to you to inform you of the fact that Animal Health officials have discovered New World Screw worm in Monroe County on Big Pine Key. Attached for your review are press releases and talking points generated by The Florida Department of Agriculture and United States Department of Agriculture pertaining to this subject.

At this time the health officials feel real confident in the fact the outbreak is isolated to the Big Pine Key and was found in Key Deer.

They have already taken steps in managing this situation:

  • ordered shipment of sterile flies and traps for monitoring from the facility in Panama that maintains these populations for control
  • FDACS officials have set up an interdiction station at Mile Marker 106, this station will stop all traffic and inspect all animals to eliminate risk of the screw worm spreading.
  • monitoring and communicating with other states and all animal industries to heighten industry awareness and focus to inspect animals.

Screw Worm Adult

The Florida Cattlemen’s Association is distributing this information to assure you we are monitoring this situation and lending any assistance we can to the Animal Health officials to disseminate information and keep our membership and all our industry contacts with the facts .

Collectively we believe the situation is being managed professionally, efficiently and expediently to avoid any potential negative impact to our industry.

We request that you share the facts as stated in the press releases and talking points to make sure everyone has accurate and concise information.

Please maintain awareness and elevate your animal monitoring to help our health officials mange this outbreak to complete eradication.


Ned Waters.
Florida Cattlemen’s Association

From Fresh From Florida

New World screwworms are fly larvae (maggots) that can infest livestock and other warm-blooded animals, including people. They most often enter an animal through an open wound or, in the case of newborns, the navel. They feed on the animal’s living flesh and, if not treated, infestations can be fatal. While New World screwworm (Cochliomyia hominivorax) has not been widely present in the United States since the 1960s, it is still found in most of South America and in five Caribbean countries.

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Joelle Hayden (301) 851-4040
Lyndsay Cole (970) 494-7410

October 3, 2016 – Washington, D.C. – The United States Department of Agriculture’s (USDA) Animal and Plant Health Inspection Service (APHIS) confirmed the presence of New World screwworm in Key deer from National Key Deer Refuge in Big Pine Key, Florida.  USDA’s National Veterinary Services Laboratories in Ames, Iowa, confirms this is a local infestation of New World screwworm (Cochliomyia hominivorax).  This is the first local infestation in the United States in more than 30 years. In response to this infestation, Florida Commissioner of Agriculture Adam H. Putnam today declared an agricultural state of emergency in Monroe County, Florida.

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Visit the CDC web site for more information

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