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Since May 18, 2018, USDA has confirmed 448 premises in California as infected with vND, including 141 in San Bernardino County, 260 in Riverside County, 45 in Los Angeles County, 1 in Ventura County, and 1 in Alameda County. USDA also confirmed 2 other infected premises: 1 in Utah and 1 in Arizona. Six commercial and industrial table egg layer operations account for about 1.2 million of the euthanized birds, with the another 120,000 mostly backyard exhibition chickens.

Since the April 20 Disease Alert Summary, there have been several status updates with regard to ongoing infectious disease outbreaks in North America, most noteably vND in California. In addition there have been several new cases including MG in Quebec, ILT in Ontario and low path H5N2 in a commercial duck farm in California. For details read more below......

Ongoing surveillance by the Minnesota Board of Animal Health has identified a new case of H5N2 low pathogenic avian influenza. This is the 9th case since October 19. Flocks are quarantined, tested and monitored until virus-negative at which time they are "controlled marketed."

This report provides an analysis of the current global situation from the OIE expertise network. The document briefly presents the key risks driving current events - how the strains are interacting with hosts (both wild birds and poultry, and sometimes humans) and the environment (season and climate, livestock husbandry systems, ecosystems) – and how the events may evolve in the months ahead.

Low pathogenic avian influenza (LPAI) has been eliminated in the five turkey flocks in California that tested positive in September and October, the California Department of Food and Agriculture (CDFA) reported. All surveillance zones have been lifted.