Fujian H5N2 In Midwest Turkey Farms Accelerates

Sunday, April 12, 2015
By Paul Martin

Recombinomics.com
April 11, 2015

State County Flyway Flock type Serotype Confirm
ND Dickey Central Commerce Turkeys H5N2 April 11
MN Kandiyohi Mississippi Commerce Turkeys H5N2 April 11
SD McCook Central Commerce Turkeys H5N2 April 10
SD McPherson Central Commerce Turkeys H5N2 April 10
MN Cottonwood Mississippi Commerce Turkeys H5N2 April 9
MN Lyon Mississippi Commerce Turkeys H5N2 April 9
MN Stearns Mississippi Commerce Turkeys H5N2 April 9
MN Watonwan Mississippi Commerce Turkeys H5N2 April 9
SD Kingsbury Central Commerce Turkeys H5N2 April 8
MN Meeker Mississippi Commerce Turkeys H5N2 April 8
MN Kandiyohi Mississippi Commerce Turkeys H5N2 April 7
MN Kandiyohi Mississippi Commerce Turkeys H5N2 April 4
MN Stearns Mississippi Commerce Turkeys H5N2 April 4
MT Judith Basin Central Backyard Mixed H5N2 April 2
MN Stearns Mississippi Commerce Turkeys H5N2 April 2
SD Beadle Central Commerce Turkeys H5N2 April 1
MN Nobles Mississippi Commerce Turkeys H5N2 April 2
MN Stearns Mississippi Commerce Turkeys H5N2 March 28
MN Lac Qui Parle Mississippi Commerce Turkeys H5N2 March 27
KS Leavenworth Central Backyard Mixed H5N2 March 13
AR Boone Mississippi Commerce Turkeys H5N2 March 11
MO Moniteau Mississippi Commerce Turkeys H5N2 March 10
MO Jasper Mississippi Commerce Turkeys H5N2 March 9
MN Pope Mississippi Commerce Turkeys H5N2 March 4
The above April 11 APHIS list cites the reported farm H5N2 outbreaks since March 4. There are two new farms, which increases the total H5N2 confirmed turkey farms to 10 for the past 4 days.

These cases are clustered on both sides of western border of Minnesota (see H5N2 map), the dividing line between the Central and Mississippi Flyways, which is more of an administrative than biological division. The current wave began with a confirmation on March 27, and 18 of the 19 confirmations were In Minnesota (13), South Dakota (4), or North Dakota (1). All 18 were commercial turkey farms and involved over 1 million turkeys.

Turkeys have a higher susceptibility to Fujian H5 than other poultry, and the combination of concentrated turkey farms and migrating waterfowl has taken its toll. The two Minnesota counties with the largest number of turkey farms are Kandiyohi, which has had 3 outbreaks, and Stearns, which has had 4 outbreaks. All other counties have had a single confirmed farm, which discounts farm to farm transmission (because of strong biosecurity, which has also limited barn to barn transer)..

The recently reported confirmation of Fujian clade 2.3.4.4 H5 in a lesser snow goose in northwestern Missouri corresponded in time and space with the earlier outbreaks in Arkansas, Missouri, and Kansas may have been a precursor for the outbreaks in the region to the north.

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