News scan for October 24, 2022

CDC confirms flu case variant in Michigan agricultural show attendee

Late last week, the Centers for Disease Control and Prevention (CDC) reported another spike in US flu activity, particularly in the southeast and south-central regions, along with another variant of H3N2 (H3N2v) flu, this time in a Michigan resident, indirectly exposed to pigs at an agricultural fair.

The variant of the flu occurred in a child who was not hospitalized and has recovered from his illness. According to the CDC, no person-to-person transmission of H3N2v has been identified in this patient.

This is the ninth case of variant influenza detected in the United States this year, including 4 H3N2v cases (Michigan, 1; West Virginia, 3) and 5 H1N2v infections (Georgia, Michigan, Ohio, and Oregon Wisconsin).

As influenza activity surges across the country, clinical labs are reporting a 4.4% positivity rate for the past week, and 3% of outpatient visits were for respiratory illness. The nonvariant H3N2 is the dominant strain this season, accounting for 79.5% of all cases detected so far. The 2009 H1N1 strain accounts for 20.5% of cases.
October 21 CDC

Four countries report new polio cases

Four countries have new polio cases this week, all vaccine-derived types. Benin, the Democratic Republic of the Congo (DRC) and Yemen have more circulating cases of vaccine-derived poliovirus type 2 (cVDPV2), while the Democratic Republic of the Congo and Malawi have circulating type 1 (cVDPV1) cases, according to the weekly report , which is published by the Global Polio Eradication Initiative (GPEI).

Benin reported a single case in Donga, bringing the total to seven cases in 2022. In Yemen, 5 new cVDPV2 cases bring the annual total to 150. The country recorded 66 cVDPV2 cases and 3 cVDPV1 cases in 2021.

The DRC reported 17 new cVDPV2 cases, bringing the year to 154. The DRC also reported 18 cVDPV1 cases, bringing the total to 28 in 2022.

Finally, Malawi reported one case of cVDPV1 in the Southern Province.
19.10. GPEI

Bird flu hits flock in Rhode Island; H5N1 detected in Mexico, Colombia

The US Department of Agriculture’s (USDA) Animal and Plant Health Inspection Service (APHIS) reported the first highly pathogenic outbreak of avian influenza in a Rhode Island poultry flock on October 21, bringing the number of affected states to 43.

The state’s Department of Agriculture said the outbreak occurred in a backyard herd in Newport County and its staff euthanized the mongrel herd. Over the summer, officials had warned local residents that avian flu had been found in shorebirds such as seagulls and that the virus was expected to spread to domestic birds. Newport County is on the Atlantic Seaboard, just south of Providence.

In related developments, APHIS has reported additional outbreaks in 10 states in recent days, all but one of which have affected backyard poultry. The other was an outbreak at an animal rehabilitation facility in Ocean County, New Jersey.

Since outbreaks of the Eurasian H5N1 strain in poultry began in early February, the virus has killed 44.6 million birds in 43 states. In related developments, APHIS reported 142 additional detections in wild birds, bringing the total to 3,072 since January.
21 October USDA APHIS Statement
21 Oct Rhode Island Department of Agriculture press release
USDA APHIS Avian Avian Flu Updates
USDA APHIS Wild Bird Avian Flu Updates

In international developments, Mexico reported its first occurrence of highly pathogenic H5N1 last week, according to a World Organization for Animal Health (WOAH) release dated Oct. 21. The discovery involved a gyrfalcon found sick in a migratory bird corridor near the town of Metepec, west of Mexico City.

Similarly, animal health officials in Colombia reported the first H5N1 findings in that country, with domestic birds coexisting with wild birds at two locations in the Choco Department in the western part of the country.

Meanwhile, European countries continue to report more H5N1 outbreaks, which have increased in recent weeks. These include the UK (wild birds), Slovenia (wild birds) and Norway (poultry farm).
October 21 WOAH report on H5N1 in Mexico
October 24 WOAH report on H5N1 in Colombia
WOAH reports on H5N1 in the UK, Slovenia and Norway


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