Goicoechea says the fight against bird flu is daunting. “Biggest challenge for us is biosecurity right now, especially when we are talking H5N1, this variant that we’re dealing with in Nevada.

Wild birds are the primary carries spreading the virus to domestic flocks. The Nevada Department of Wildlife tells FOX5 every dead wild bird found is not necessarily tested.

Federal health officials say a dairy worker in Nevada has been infected with a new type of bird flu that’s different from the version that has been spreading in U.S. herds since last year.

By Brenda Goodman, CNN (CNN) — Six dairy herds in Nevada have tested positive for a newer variant of the H5N1 bird flu virus that’s been associated with severe infections in humans, according ...