Sunday, July 1, 2012

Mexico H7N3 Illness in Human post clarificcation

In an earlier post, located here, it was stated that the H7N3 does not affect humans. That was incorrect.

The H7N3 virus, which doesn't affect humans, was detected in Mexico for the first time this month in Acatic and Tepatitlan, leading officials to take emergency measures such as quarantining farms, evaluating nearby ones and limiting the movement of live poultry to keep the virus from spreading.




From the CDC Website: Three prominent subtypes of avian influenza A viruses that are known to infect both birds and people...

Influenza A H7

Nine potential subtypes of H7 viruses are known (H7N1, H7N2, H7N3, H7N4, H7N5, H7N6, H7N7, H7N8, and H7N9). Most H7 viruses identified worldwide in wild birds and poultry are LPAI viruses. H7 virus infection in humans is uncommon, but has been documented in persons who have direct contact with infected birds, especially during outbreaks of H7 virus among poultry. Illness in humans may include conjunctivitis and/or upper respiratory tract symptoms. In humans, LPAI (H7N2, H7N3, H7N7) virus infections have caused mild to moderate illness, and HPAI (H7N3, H7N7) virus infections have caused mild to severe and fatal illness.



Highly Pathogenic Avian Influenza found in Commercial Poultry in Mexico
On June 25, 2012 the USDA’s Veterinary Services (VS) branch of the Animal and Plant Health Inspection Service was informed by their Mexican counterparts the detection of Highly Pathogenic Avian Influenza (HPAI) H7N3 virus in three large commercial operations in the Mexican State of Jalisco. In total, over one million birds are believed susceptible across the three farms and over 200,000 have already died from the outbreak. A further 60,000 have been destroyed. The state of Jalisco, Mexico’s highest egg producing region does not export poultry to the United States.

VS will take the following actions, which are standard when HPAI is detected in a country that was considered free:

Initially, VS will consider the entire country affected with HPAI.
Once VS is able to evaluate the epidemiology information provided to us from Mexico, we may be able to narrow the nationwide ban, likely to a single state. After regionalizing to the state level, we may be able to regionalize further, to the county level. This will depend on an assessment of the risk and the effectiveness of movement restrictions from the affected area.

U.S. port personnel will be notified through a port alert.
APHIS will be in close contact with Mexican government officials to gather epidemiological information regarding the progress of the disease control operations in the State of Jalisco.
Sixty poultry farms within the area of the outbreaks have been sampled in order to determine their health status and officials are in the process of establishing control measures to prevent further spread.

We do not anticipate that the detection will have an extensive impact on trade. Only two establishments in Mexico export fresh poultry meat to the United States. Based on our regulations, these establishments only receive U.S. origin poultry for further processing (cut up, deboned, packaged), which is then exported back to the U.S. This trade will not be affected by the HPAI detection. Except for returning US-origin pet birds, live birds are not allowed from HPAI-affected countries. Over the past year, ten returning pets of U.S.-origin were imported from Mexico, along with one shipment of 40 birds for commercial sale. No live poultry or eggs for hatching were legally imported from Mexico during that timeframe.

http://www.cdfa.ca.gov/ahfss/animal_health

1 comment:

Anonymous said...

Do you have more information on h7n3 cases on humans that has been in contact with sick birds ?