Mexico Reports HPAI Outbreaks in Birds

Mexico Reports HPAI Outbreaks in Birds
USAgNet - 01/14/2013

The Mexican veterinary authorities have reported two new outbreaks of highky pathogenic avian influenza at farms located in Aguascalientes. The World Organization for Animal Health received an immediate notification on January 9. The causal agent has been identified as HPAI virus, seroptype H7N3.

A total of 284755 birds were found susceptible, out of which approximately 2990 cases were identified. 740 deaths were reported. A total of 284015 birds were taken to slaughter.

The source of the outbreaks has not yet been determined.

According to the OIE, the last outbreak of highly pathogenic avian influenza serotype H7N3 occurred in September 2012 in the northeastern part of the State of Jalisco. Following control and eradication measures, passive and active surveillance was strengthened and on 3 January 2013 SENASICA was informed of an increase in mortality and a decrease of egg production on a commercial layer farm in the State of Aguascalientes.

Timely notification from the farmer and surveillance activities allowed immediate depopulation of the two affected production units, reason why both outbreaks identified are closed.

The first outbreak had a population of 146,755 birds aged 21-80 weeks, of which 2,990 sick and 740 dead. Clinical signs were conjunctivitis, edema, cyanosis and palpebral, comb and chin swelling as well as opisthotonos and sudden death. Additionally, during post-mortem inspections, hemorrhages were identified in trachea, lungs and tonsils.

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Source: http://www.usagnet.com/story-national.php?Id=100

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