MEXICO · CATTLE TRADE
Key Facts
- —The country Mexico sends feeder calves to US feedlots, and since 24 August 2026 the Douglas, Arizona crossing has taken cattle from Sonora again.
- —Why it matters Douglas is the Arizona port where Sonora calves enter the United States, so a disease scare there can delay supply to American feedlots.
- —Why now Mexico’s agriculture ministry said on Saturday 17 October that sores on a calf at Agua Prieta were not foot-and-mouth disease, and Sonora set exports to restart on Tuesday 20 October.
- —What happened Laboratory samples tested positive for bovine papular stomatitis, a cattle disease that the ministry says is found worldwide and carries no major risk for animal health.
- —The numbers One calf was affected, the result came in under 24 hours, and Sonora expects about 1,300 head a day to cross again.
- —What it means for you US feedlots and beef buyers can expect the pause to end on Tuesday, if US inspectors accept the cattle at Douglas.
- —Still open Whether the US Department of Agriculture comments on the restart, and whether crossings return to about 1,300 head a day.
- —Power Index Mexico ranks 2nd of 14 in The Rio Times Latin America Power Index, with 71.4 points (October 2026 edition).
Sonora cattle exports to the United States will restart on Tuesday 20 October after Mexico’s agriculture ministry ruled out foot-and-mouth disease in a calf found with mouth sores at Agua Prieta. Laboratory tests showed bovine papular stomatitis instead, the ministry said on Saturday 17 October, describing it as a cattle disease found worldwide that carries no major risk for animal health.
For US readers, the finding clears the way for Mexican calves to reach feedlots through the Arizona port of Douglas, which the US Department of Agriculture reopened to Mexican cattle on 24 August 2026. The pause began on Friday 16 October, as our earlier report Sonora Cattle Exports Halt Over Calf Sores explained.
The restart date comes from the Sonora state government and the regional cattlemen’s union, not from a federal order. We found no statement from the US Department of Agriculture on the calf, or on the conditions for resuming crossings, by Sunday 18 October.
What Happened on Friday and Saturday
On Friday 16 October inspectors at the Agua Prieta quarantine station found a calf with sores in its mouth that was about to be exported to Douglas, Arizona. Staff of the joint Mexico-US foot-and-mouth commission took samples, and the commission ordered the animals at the station sent back to their place of origin and the premises disinfected, N+ reported.
The regional cattlemen’s union, known as UGRS, said that day it had found an animal with a lesion whose symptoms could match foot-and-mouth disease, and exports were halted as a precaution. N+ reported that the commission opened its investigation on 16 October and analyzed the samples on 17 October.
On Saturday the ministry announced the result in a statement dated 17 October. It said the laboratory confirmed the case in under 24 hours, which it said shows Senasica’s capacity for immediate diagnosis.
What the Laboratory Found
The ministry said the samples were positive for the virus of bovine papular stomatitis, a disease of worldwide distribution that it says poses no major risk for animal health. It added that Mexico has been free of foot-and-mouth disease since 1954.
On Friday the ministry’s animal health service, Senasica, had named two look-alike diseases, vesicular stomatitis and bovine papular stomatitis, as possible causes of the sores. The Saturday result points to the second, which El Universal describes as a disease that mainly affects the skin and mucous membranes of cattle.
N+, a Mexican news outlet, reported that a results report from the joint commission shows negative foot-and-mouth tests on swab and whole-blood samples and a positive test for papular stomatitis. Tribuna, a Mexican newspaper, reported that a separate commission report dated 17 October shows a negative foot-and-mouth result on a bovine serum sample using a test called ELISA 3ABC.
The commission is attached to Senasica, and its staff took the samples. The tests ran at the high-security Palo Alto laboratory in Mexico City, according to the ministry.
When Sonora Cattle Exports Resume
Sonora’s agriculture department, known as Sagarhpa, said the Agua Prieta crossing will reopen on Tuesday 20 October, on the schedule it announced on Friday. It said Senasica’s analysis found the case limited to one animal and that nothing justified keeping exports suspended.
The ministry’s Saturday statement does not give a restart date, N+ noted, although its Friday notice had said operations would resume next week once an exotic disease was ruled out. Exports through the San Jerónimo station in Chihuahua kept flowing normally during the pause, according to the same notice.
The union said the Agua Prieta station will resume after cleaning and disinfecting its facilities, which the US Department of Agriculture will verify, Excélsior reported. Excélsior put the combined flow at the two open border ports, in Chihuahua and Sonora, at about 2,500 head a day.
Diario del Yaqui, a Sonora newspaper, reported that the reopening foresees about 1,300 head a day, a volume the state says was already reached the week before the stop. The paper said the pause cost producers, buyers and truckers extra money for corrals, rescheduled shipments and delays.
What the Restart Depends On
Cattle can cross only when US inspectors accept them at Douglas. USDA’s animal health page says the port reopened on 24 August under an import protocol agreed between the two countries, and we found no US statement on whether anything changes after this case.
Our report One Infected Cow in Sonora Lands Days Before the US Reopens Its Cattle Border covers how that reopening came about. It also shows why a single animal can draw so much attention at this border.
Why the Scare Mattered
Infobae, citing the World Organisation for Animal Health, describes foot-and-mouth disease as a highly contagious viral disease of cattle, pigs, sheep and goats that does not pass to humans. A suspected case at a border crossing stops shipments even when the cause turns out to be milder.
The ministry stressed that the signs in the calf resemble those of exotic diseases that are absent from Mexico. Infobae added that a visual check was not enough, so laboratory tests were needed to settle the question.
What It Means for You
US feedlots and cattle buyers can expect the flow of Mexican calves through Douglas to return from Tuesday, if US inspectors accept the animals. At the 1,300 head a day that Sonora’s government plans, each working day lost means that many fewer Mexican calves reaching American pens.
Investors in beef and cattle should watch for a USDA statement and for the first crossings on Tuesday rather than for further disease news. Our Mexico economy outlook and Mexico in North America guides set out how farm trade fits into the wider US-Mexico relationship.
What Is Not Known
It is not known whether USDA will accept cattle at Douglas on Tuesday, because no US statement on the case turned up in our checks of its animal health pages on Sunday. The restart date rests on the Sonora government and the cattlemen’s union, and no newer development was found by Sunday afternoon.
We did not see the commission’s reports ourselves, so the swab, blood and serum details come from N+ and Tribuna, which describe different sample types. The ministry’s statement does not say whether other animals from the same consignment were examined.
The sources do not say what became of the calf itself or how many animals the pause delayed. They also do not show whether crossings will reach 1,300 head a day straight away.
Frequently Asked Questions
Is there foot-and-mouth disease in Mexico?
No case was found in the Agua Prieta calf, and the ministry says the animal had bovine papular stomatitis. It says Mexico has been free of foot-and-mouth disease since 1954.
When do Sonora cattle exports resume?
Sonora’s government says crossings at Agua Prieta restart on Tuesday 20 October. The date depends on US inspectors accepting cattle at Douglas, and no US statement had been found by Sunday.
What is bovine papular stomatitis?
The ministry calls it a disease of worldwide distribution that carries no major risk for animal health. El Universal says it mainly affects the skin and mucous membranes of cattle.
How many cattle cross at Agua Prieta?
Sonora expects about 1,300 head a day when crossings resume, a level it says was reached the week before the halt. Excélsior put the combined flow at the Sonora and Chihuahua ports at about 2,500 head a day.
What does it mean for US cattle buyers?
Mexican calves should again reach feedlots through Douglas if inspections go ahead on Tuesday. The pause covered the Agua Prieta station only, and Chihuahua exports kept moving.
Sources: Agricultura (Mexico), communiqué of 17 October 2026; N+, 17 October 2026; Excélsior, 17 October 2026; El Universal, 17 October 2026; Tribuna, 17 October 2026; Diario del Yaqui, 18 October 2026; Infobae, 18 October 2026; USDA APHIS, current status page, modified 14 October 2026.
This article was produced by The Rio Times’ automated newsroom system. How we use AI · Report an error · Editorial responsibility: Matthias Camenzind, Editor-in-Chief