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#USA, Confirmed #H5N1 avian #flu virus #human case summary during 2024 #outbreak, by state & exposure source {as of Dec. 23: +1 case, total = 65}

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By G.M.

{Excerpt, edited}

Exposure Source

[State - Exposure Associated with Commercial Agriculture and Related Operations: Dairy Herds (Cattle) Poultry Farms and Culling Operations - Other Animal Exposure† - Exposure Source Unknown‡ - State Total]

1) California - 35 - 0 - 0 - 1 - 36

2) Colorado - 1 - 9 - 0 - 0 - 10

3) Iowa - 0 - 1 - 0 - 0 - 1 {+1}

4) Louisiana - 0 - 0 - 1 - 0 - 1

5) Michigan - 2 - 0 - 0 - 0 - 2

6) Missouri - 0 - 0 - 0 - 1 - 1

7) Oregon - 0 - 1 - 0 - 0 - 1

8) Texas - 1 - 0 - 0 - 0 - 1

9) Washington - 0 - 11 - 0 - 0 - 11

10) Wisconsin - 0 - 1 - 0 - 0 - 1

-- Source Total - 39 - 23 - 1 - 2 - 65 {+1}

NOTE: One additional case was previously detected in a poultry worker in Colorado in 2022.

{†} Exposure was related to other animals such as backyard flocks, wild birds, or other mammals

{‡} Exposure source was not able to be identified


Probable human case summary during the 2024 outbreak, by state and exposure source

When a case tests positive for H5 at a public health laboratory but testing at CDC is not able to confirm H5 infection, per Council of State and Territorial Epidemiologists (CSTE) guidance, a case is reported as probable.

[Probable cases with commercial poultry exposure (e.g., poultry farms or culling operations):]

-- Washington (3)

-- Arizona (2)

[Probable cases with commercial dairy (cattle) exposure:]

-- California (1)

[Probable cases with exposure source unknown:]

-- Delaware (1)

Confirmed and probable cases are typically updated by 5 PM EST on Mondays (for cases confirmed by CDC on Friday, Saturday, or Sunday), Wednesdays (for cases confirmed by CDC on Monday or Tuesday), and Fridays (for cases confirmed by CDC on Wednesday and Thursday). Affected states may report cases more frequently.

(...)

Source: US Centers for Disease Control and Prevention, https://www.cdc.gov/bird-flu/situation-summary/?CDC_AAref_Val=https://www.cdc.gov/flu/avianflu/avian-flu-summary.htm

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