CDC confirms variant flu case in Michigan agricultural fair attendee
Late last week, the Centers for Disease Control and Prevention (CDC) reported a further rise in US flu activity, particularly in the southeast and south central regions, along with another variant H3N2 (H3N2v) flu case, this time in a Michigan resident who had indirect exposure to swine at an agricultural fair.
The variant flu case occurred in a child who was not hospitalized and has recovered from his or her illness. No person-to-person transmission of H3N2v associated with this patient has been identified, the CDC said.
This is the ninth variant flu case detected in the United States this year, including 4 H3N2v cases (Michigan, 1; West Virginia, 3), and 5 H1N2v infections (Georgia, Michigan, Ohio, Oregon, and Wisconsin).
As flu activity rises across the country, clinical labs are reporting a 4.4% positivity rate for the past week, and 3% of outpatient visits have been for respiratory illnesses. Nonvariant H3N2 is the dominant strain this season, representing 79.5% of all cases detected thus far. The 2009 H1N1 strain represents 20.5% of cases.
Oct 21 CDC FluView
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 vaccine-derived poliovirus type 2 (cVDPV2) cases, while the DRC and Malawi have circulating type 1 (cVDPV1) cases, according to the weekly report published by the Global Polio Eradication Initiative (GPEI).
Benin reported a single case in Donga, bringing its 2022 total to seven cases. In Yemen 5 new cVDPV2 cases bring its yearly total to 150. The country saw 66 cVDPV2 cases and 3 cVDPV1 cases in 2021.
The DRC reported 17 new cVDPV2, bringing the yearly total to 154. The DRC also reported 18 cVDPV1 cases, raising the 2022 total to 28.
Finally, Malawi reported one cVDPV1 case in Southern province.
Oct 19 GPEI report
Avian flu strikes Rhode Island flock; H5N1 detected in Mexico, Colombia
The US Department of Agriculture (USDA) Animal and Plant Health Inspection Service (APHIS) on Oct 21 reported the first highly pathogenic avian flu outbreak in a Rhode Island poultry flock, raising the number of affected states to 43.
The state's agriculture department said the outbreak occurred in a backyard flock in Newport County and that its employees have euthanized the mixed-breed flock. Over the summer, officials had warned residents that avian flu had been found in shorebirds such as gulls and that it expected that the virus would spread to domestic birds. Newport County is on the Atlantic coast, just south of Providence.
In related developments, APHIS over the past few days has reported more outbreaks in 10 states, all but 1 involving backyard poultry. The other was an outbreak at an animal rehabilitation facility in New Jersey's Ocean County.
Since outbreaks involving the Eurasian H5N1 strain began in poultry in early February, the virus has led to the loss of 44.6 million birds across 43 states. In related developments, APHIS reported 142 more detections in wild birds, bringing the total since January to 3,072.
Oct 21 USDA APHIS statement
Oct 21 Rhode Island Department of Agriculture news release
USDA APHIS poultry avian flu updates
USDA APHIS wild bird avian flu updates
In international developments, Mexico last week reported its first appearance of highly pathogenic H5N1, according to an Oct 21 notification from the World Organization for Animal Health (WOAH). The detection involved a gyrfalcon found sick in a migratory bird corridor near the city of Metepec, just west of Mexico City.
Similarly, animal health officials in Colombia reported the first H5N1 detections in that nation, which involved domestic birds living together with wild birds at two locations in Choco department in the western part of the country.
Meanwhile, European countries continue to report more H5N1 outbreaks, which have picked up over the last several weeks. They include the United Kingdom (wild birds), Slovenia (wild birds), and Norway (poultry farm).
Oct 21 WOAH report on H5N1 in Mexico
Oct 24 WOAH report on H5N1 in Colombia
WOAH reports on H5N1 in the UK, Slovenia, and Norway