#USA, #Monitoring for Avian #Influenza A(#H5) Virus In #Wastewater {Dec. 6 ’24}

Source: US Centers for Disease Control and Prevention, https://www.cdc.gov/bird-flu/h5-monitoring/index.html

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Time Period: November 24 – November 30, 2024

— H5 Detection: 43 sites (14.7%)

— No Detection: 249 sites (85.3%)

— No samples in last week: 52 sites

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#aH5n1 #avianInfluenza #updates #USCDC #USA #wastewater

#USA, Confirmed #human #H5N1 virus cases summary during 2024 #outbreak, by state and exposure source, as of Nov. 4 ’24: One new case, total = 58

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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Exposure Source
[State – Cattle – Poultry – Unknown – State Total]
1) California – 31 – 0 – 1 – 32 {+1}
2) Colorado – 1 – 9 – 0 – 10
3) Michigan – 2 – 0 – 0 – 2
4) Missouri – 0 – 0 – 1 – 1
5) Oregon – 0 – 1 – 0 – 1
6) Texas – 1 – 0 – 0 – 1
7) Washington – 0 – 11 – 0 – 11
— Source Total – 35 – 21 – 2 – 58 {+1}

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

Additional cases meeting the Council of State and Territorial Epidemiologists (CSTE) probable case definition have been reported by states: 1 case with dairy cow exposure (CA), 3 cases with poultry exposure (WA). Confirmatory testing at CDC for these cases was negative.

This table is 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.

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#aH5n1 #avianInfluenza #AVIANINFLUENZA #birdFlu #h5n1 #health #human #news #updates #USCDC #USA

#USA, Confirmed #human cases of #H5N1 #birdflu virus summary during 2024 #outbreak, by state and exposure source, as of Dec. 2 ’24: 2 new cases, total = 57

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

{Excerpt}

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Exposure Source
[State – Cattle – Poultry – Unknown – State Total]
1) California – 30 – 0 – 1 – 31 {+2}
2) Colorado – 1 – 9 – 0 – 10
3) Michigan – 2 – 0 – 0 – 2
4) Missouri – 0 – 0 – 1 – 1
5) Oregon – 0 – 1 – 0 – 1
6) Texas – 1 – 0 – 0 – 1
7) Washington – 0 – 11 – 0 – 11
— Source Total – 34 – 21 – 2 – 57 {+2}

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

Additional cases meeting the Council of State and Territorial Epidemiologists (CSTE) probable case definition have been reported by states: 1 case with dairy cow exposure (CA), 3 cases with poultry exposure (WA). Confirmatory testing at CDC for these cases was negative.

This table is 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.

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#aH5n1 #avianInfluenza #AVIANINFLUENZA #birdFlu #h5n1 #health #human #news #updates #USCDC #USA

#USA, Monitoring for Avian #Influenza A(#H5) Virus In #Wastewater, as of Dec. 2 ’24

Source: US Centers for Disease Control and Prevention, https://www.cdc.gov/bird-flu/h5-monitoring/index.html

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Time Period: November 17 – November 23, 2024

— H5 Detection: 50 sites (16.1%)
— No Detection: 260 sites (83.9%)
— No samples in last week: 35 sites

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#aH5n1 #avianInfluenza #updates #USCDC #USA #wastewater

#USA, Novel #Influenza A #H5N1 Virus {week 47, FluView}: 2 new cases in California (State Total = 31)

Source: US Centers for Disease Control and Prevention, https://www.cdc.gov/fluview/surveillance/2024-week-47.html

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Two confirmed human infections with influenza A(H5) viruses were reported to CDC this week by the California Department of Public Health. To date, human-to-human transmission of influenza A(H5) virus has not been identified in the United States.

These cases occurred in workers at commercial dairy cattle farms in areas where highly pathogenic avian influenza (HPAI) A(H5N1) viruses had been detected in cows. There have now been 31 total confirmed cases and one probable human case in California.

Both individuals reported this week are ≥18 years old. These individuals had mild symptoms, which they reported to local health department officials. Specimens were collected from the individuals and were initially tested at state or local public health laboratories using the CDC influenza A(H5) assay before being sent to CDC for further testing. Specimens from the confirmed cases were positive for influenza A(H5) virus using diagnostic RT-PCR at CDC. Additional analysis including genetic sequencing is underway.

In response to these detections, additional case investigations and surveillance activities are being conducted by public health officials in California and Washington.

The CSTE position statement, which includes updated case definitions for confirmed, probable, and suspect cases is available at http://www.cste.org/resource/resmgr/position_statements_files_2023/24-ID-09_Novel_Influenza_A.pdf

An up-to-date human case summary during the 2024 outbreak by state and exposure source is available at http://www.cdc.gov/bird-flu/situation-summary/index.html

Information about avian influenza is available at https://www.cdc.gov/flu/avianflu/index.htm.

Interim recommendations for Prevention, Monitoring, and Public Health Investigations are available at https://www.cdc.gov/bird-flu/prevention/hpai-interim-recommendations.html.

The latest case reports on avian influenza outbreaks in wild birds, commercial poultry, backyard or hobbyist flocks, and mammals in the United States are available from the USDA at https://www.aphis.usda.gov/aphis/ourfocus/animalhealth/animal-disease-information/avian/avian-influenza/2022-hpai.

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#aH5n1 #avianInfluenza #AVIANINFLUENZA #birdFlu #california #h5n1 #health #human #news #updates #USCDC #USA

#USA, Confirmed #H5N1 virus #human case #summary during 2024 #outbreak, by state and exposure source: 2 new cases, total: 55 as of Nov. 22 ’24

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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Exposure Source
[State – Cattle – Poultry – Unknown – State Total]
1) California – 28 – 0 – 1 – 29 {+2}
2) Colorado – 1 – 9 – 0 – 10
3) Michigan – 2 – 0 – 0 – 2
4) Missouri – 0 – 0 – 1 – 1
5) Oregon – 0 – 1 – 0 – 1
6) Texas – 1 – 0 – 0 – 1
7) Washington – 0 – 11 – 0 – 11
— Source Total – 32 – 21 – 2 – 55 {+2}

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

Additional cases meeting the Council of State and Territorial Epidemiologists (CSTE) probable case definition have been reported by states: 1 case with dairy cow exposure (CA), 3 cases with poultry exposure (WA). Confirmatory testing at CDC for these cases was negative.

This table is 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.

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#aH5n1 #avianInfluenza #AVIANINFLUENZA #birdFlu #h5n1 #health #human #news #updates #USCDC #USA

#US #CDC confirms #H5N1 #Birdflu #Infection in a #Child in #California

Source: US Centers for Disease Control and Prevention, https://www.cdc.gov/media/releases/2024/p1122-h5n1-bird-flu.html?ACSTrackingID=USCDC_1_3-DM141264&ACSTrackingLabel=CDC%20Newsroom%3A%20Week%20In%20Review%20-%2011%2F22%2F24&deliveryName=USCDC_1_3-DM141264

Consistent with previously identified human cases in the United States, the child reportedly experienced mild symptoms and received flu antivirals. There were low levels of viral material detected in the initial specimen collected, and follow-up testing of the child several days later was negative for H5 bird flu but was positive for other common respiratory viruses. The child is recovering from their illness. An investigation by the California Department of Public Health (CDPH) into the child’s possible H5N1 exposure source is ongoing.

During CDPH’s investigation, all household members reported having symptoms and specimens were collected from those people. All test results from members of the household were negative for H5 bird flu, and some family members were positive for the same common respiratory viruses as the child. Contact tracing continues, but there is currently no evidence of person-to-person spread of H5N1 bird flu from this child to others. To date, there has been no person-to-person spread identified associated with any of the H5N1 bird flu cases reported in the United States.

This case was detected through influenza testing and reported to CDPH through influenza surveillance. This is the second U.S. case identified through national surveillance. CDC continues to closely monitor available data from influenza surveillance systems, particularly in states affected by outbreaks in animals, including California, where widespread outbreaks of H5N1 bird flu have been detected in wild birds and domestic poultry since 2022 and dairy herds since August 2024 in that state.

Limited and sporadic human infections with avian influenza H5N1 virus, where animal exposure was not identified, are very uncommon but have occurred, primarily in countries other than the United States. These instances underscore the importance of ongoing surveillance and investigations at the local, state, and Federal levels. Including this most recent case, 55 human cases of H5 bird flu have now been reported in the United States during 2024, with 29 in California.

CDC’s risk assessment for the general public is low. However, people with exposure to infected or potentially infected animals, such as birds, dairy cattle, or other animals (including livestock), or to environments contaminated by infected birds or other animals, are at higher risk of infection. CDC recommends avoiding unprotected exposures to sick or dead animals, including wild birds, poultry, other domesticated birds, and other wild or domesticated animals (including cows).

CDC will continue to provide updates as additional information becomes available. For more information, read California’s statement State Reports Single, Possible Case of Bird Flu Virus in Child with Mild Symptoms.

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#aH5n1 #avianInfluenza #AVIANINFLUENZA #birdFlu #california #h5n1 #health #human #news #updates #USCDC #USA

#USA, Novel Influenza A #H5N1 Virus #Infections: Six new cases, 5 in #California and 1 in #Oregon

Source: US Centers for Disease Control and Prevention, https://www.cdc.gov/fluview/surveillance/2024-week-46.html

{Excerpts}

Five confirmed cases were reported by the California Department of Public Health. Four of these cases occurred in workers at commercial dairy cattle farms in areas where highly pathogenic avian influenza (HPAI) A(H5N1) viruses had been detected in cows, and one case occurred in a child with no known contact with influenza A(H5N1) virus-infected animals. The investigation into the source of infection for this case is ongoing, but there is currently no evidence of human-to-human transmission. There have now been 29 total confirmed human cases and one probable human case in California.

One confirmed case was reported by the Oregon Health Authority. This case was in a worker who performed depopulation activities at a commercial poultry facility where HPAI A (H5N1) viruses had been detected in birds. This is the first human case identified in Oregon.

Five of the six individuals reported this week are more than 18 years old and one was less than 18 years old. All six individuals had mild symptoms. Specimens from all six individuals were tested at state or public health laboratories using the CDC influenza A (H5) assay before being sent to CDC for further testing. Specimens from all six confirmed cases were positive for influenza A(H5) virus using diagnostic RT-PCR or genetic sequencing at CDC. Additional analysis including genetic sequencing is underway.

In response to these detections, additional case investigations and surveillance activities are being conducted by public health officials in California and Oregon.

The CSTE position statement, which includes updated case definitions for confirmed, probable, and suspect cases is available at http://www.cste.org/resource/resmgr/position_statements_files_2023/24-ID-09_Novel_Influenza_A.pdf

An up-to-date human case summary during the 2024 outbreak by state and exposure source is available at http://www.cdc.gov/bird-flu/situation-summary/index.html

Information about avian influenza is available at https://www.cdc.gov/flu/avianflu/index.htm.

Interim recommendations for Prevention, Monitoring, and Public Health Investigations are available at https://www.cdc.gov/bird-flu/prevention/hpai-interim-recommendations.html.

The latest case reports on avian influenza outbreaks in wild birds, commercial poultry, backyard or hobbyist flocks, and mammals in the United States are available from the USDA at https://www.aphis.usda.gov/aphis/ourfocus/animalhealth/animal-disease-information/avian/avian-influenza/2022-hpai.

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#aH5n1 #avianInfluenza #AVIANINFLUENZA #birdFlu #california #h5n1 #health #human #news #oregon #updates #USCDC #USA

#USA, #H5 #detection in #wastewater in the past week: November 10 – November 16, 2024

Source: US Centers for Disease Control and Prevention, https://www.cdc.gov/nwss/rv/wwd-h5.html

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H5 Detection: 46 sites (14.2%)

No Detection: 279 sites (85.8%)

No samples in last week: 24 sites

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#aH5n1 #avianInfluenza #california #updates #USCDC #USA #wastewater