California officials have announced new requirements for pets entering the state from Arizona, aiming to stop the spread of New World screwworm, a parasitic fly whose larvae can cause fatal tissue damage in animals and, in rare cases, people.
What the new rules entail
Anyone traveling from Arizona to California with a dog, cat, or other warm‑blooded animal must now provide documentation proving the animal is not infected with the screwworm. The proof must be presented at the point of entry and is required for all pets, regardless of destination within California.
For animals originating in designated “infested zones” – areas around Sierra Vista, Elfrida and Safford in southeastern Arizona – additional steps are required. Those steps include a veterinary inspection and a negative test result confirming the absence of screwworm larvae. Full details of the extra requirements can be found on the California Department of Food and Agriculture website.
Why the change now?
The Arizona Department of Agriculture reported a fifth case of New World screwworm this week, a dog from Graham County that tested positive for the parasite. The increase prompted neighboring California to act quickly to protect its own livestock, wildlife and pet populations.
New World screwworm is a fly whose larvae feed on living tissue. In livestock, infestations can lead to severe wounds, loss of productivity and even death if untreated. While human cases are rare, the disease can be life‑threatening when it does occur.
State response and prevention efforts
California’s Department of Food and Agriculture emphasized that the new rules are a precautionary measure designed to keep the parasite out of the state’s agricultural heartland. Officials urged pet owners to inspect any wounds on their animals closely and to report any signs of maggot infestation to local animal health authorities.
Earlier this year, the U.S. Department of Agriculture awarded the University of Arizona a $3.74 million grant to bolster the state’s preparedness for the screwworm threat. The funding supports research, surveillance and rapid‑response capabilities aimed at containing outbreaks before they spread across state lines.
What pet owners should do
Arizona residents planning to travel with pets to California should schedule a veterinary check‑up well before their trip. A veterinarian can perform the necessary examinations and, if needed, arrange for laboratory testing to confirm the animal is screwworm‑free.
Pet owners should also keep an eye on any open wounds, especially in outdoor or rural settings where flies are most active. Prompt cleaning and treatment of wounds can reduce the risk of infestation.
Looking ahead
Both states are monitoring the situation closely. California officials said they will continue to assess the effectiveness of the new travel requirements and may adjust them as more data become available. Meanwhile, Arizona’s Department of Agriculture is increasing surveillance in the identified infested zones and encouraging residents to report any suspicious cases.
By working together, the two states hope to keep New World screwworm from establishing a foothold in California’s farms and communities, protecting both the agricultural economy and the health of pets and people alike.
Original reporting: azfamily KTVK/KPHO Phoenix (news) — read the source article.
