Pet owners who live in areas with New World screwworm cases should monitor their cats and dogs closely, inspecting them every day for behavior changes or signs of infestation.
The US Department of Agriculture has now confirmed 12 New World screwworm infestations in the United States, 11 of them in Texas.
The authorization comes amid a growing outbreak in which one dog has been infected.
Infections in US animals rise to 6 amid increasing concerns of further spread.
The second case of New World screwworm in Texas was found just 5 miles from the first.
There are more reports of attacks on burial teams and healthcare workers.
This is the first detection of larva of the parasitic fly in the US in 60 years.
The new measles cases are not related to the Upstate outbreak that ended last month after 997 cases
Mexico has now reported 141 human cases of the parasitic infection, which is spread by flies.
The US previously eradicated NWS through releasing sterile male flies to mate with female NWS blowflies.
