Quarantine lifted in Sonora state after bird flu cases

The Ministry of Agriculture and Rural Development (Sadr) on Friday canceled the quarantine established in Sonora state since October after verifying that the highly pathogenic avian influenza AH5N1 is no longer present in the state, it was reported on Friday. Internal quarantine.

The agency said in a statement that it made the decision “after verifying that there were no more cases of highly pathogenic avian influenza (influenza) AH5N1 in the entity over the past 25 days.”

On October 27, the National Agricultural Food Health, Safety and Quality Service (Senasica) ordered the quarantine of two poultry farms in Sonora state after detecting the presence of the virus. Additionally, they found the pathogen in wild birds in Tototlan, Jalisco; Tuxpan, Veracruz, and Ensenada, Baja California.

After the quarantine is over, Sadr has now authorized emergency vaccination in strategic areas. The first phase will start in areas with high animal health risks and on farms with hens. For these areas, the agency noted that the hens will be vaccinated Vaccination. Bank with 36.1 million vaccine doses.

“Health authorities approve emergency vaccination after completion of diagnostic tests for the virus, with the aim of ensuring the effectiveness of the biological agent to be used,” the agency said.

READ: Mexico reports first outbreak of H5N1 bird flu at a farm in Sonora state

In addition, technical staff from the U.S.-Mexico Senasica Commission for the Prevention of Foot-and-Mouth and Other Exotic Animal Diseases (CPA) performed an initial isolation of the AH5N1 virus at a high biosafety laboratory in Palo Alto, a city in Mexico.

This is to compare the genome of the current virus with that of the previous year and analyze whether organisms used in the 2022 migration cycle will be effective against viruses entering the country this year.

Avian influenza viruses, like the viruses that cause human influenza, are among the pathogens most likely to undergo genetic changes, which means that year after year, when the migration season for wild birds from the north of the continent arrives, the type of virus present must be determined and subtype characteristics.

Specifically, the agency noted that the outbreak affecting Sonora involved two production units, with 144,000 poultry slaughtered at the end of their production cycle, “less than 0.1 percent of the national chicken flock,” and that no chicken or egg cases were affected. supply. domestic.

According to information from EFE

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