U.S. officials confirmed three additional cases of New World screwworm on Tuesday, bringing the total to five since the first domestic infestation in six decades was found in a Texas calf last week.
The U.S. Department of Agriculture’s Animal and Plant Health Inspection Service said the new cases included a calf in La Salle County, Texas, and a goat in Gillespie County, Texas.
The agency also said a case reported earlier Tuesday in a dog in Andrews County, Texas, would be reclassified as the first case detected in New Mexico. The veterinarian who reported the case is in Texas, but the dog lives in Lea County, New Mexico, near the Texas border, the agency said.
New World screwworm can infest warm-blooded animals, including livestock, pets, wildlife, and, in rare cases, people. Its larvae burrow into living tissue, causing wounds and economic losses.
Texas ranchers had been preparing for the pest to enter the United States as it moved north through Mexico.
“This situation is evolving, and we expect new information to emerge as our investigation continues,” Dudley Hoskins, the USDA under secretary for marketing and regulatory programs, said in a statement.
Agriculture Secretary Brooke Rollins said at a Monday news conference in Kerrville, Texas, that the agency would soon announce recipients of awards from a $100 million fund for screwworm technologies announced last year.
Rollins, who appeared with Texas Gov. Greg Abbott, said she would travel Thursday to Zavala County, Texas, where the first screwworm case was identified.
“We now know what the enemy looks like,” she said, standing in front of posters that read “War On Screwworm.”
Reuters reported last year that hundreds of veterinarians, support staff, and lab workers had left the USDA’s animal health division after the Trump administration pushed for resignations, reducing the number of specialists available to respond to animal disease outbreaks.
Rollins said those departures were not affecting the current response.
“There has been zero impact to this mission area, specifically to the screwworm, based on that reduction in force,” she said.
Local residents and ranchers in Texas remained divided over the USDA response, with some saying it was too slow or too limited, while some who lived through the last outbreak said the latest cases further reduced their trust in the agency.