PARIS, March 18 — The United States reported the first outbreak of the deadly H7N9 bird flu on a poultry farm since 2017, as the country continues to grapple with another bird flu strain that has infected humans and caused egg prices to hit record highs.

CANBERRA, June 4 — Highly pathogenic avian influenza has been detected at a third poultry farm near Melbourne, but not the same strain that spread globally and raised fears of human transmission, the Victoria government said on Wednesday.