Highly pathogenic strains of avian influenza were also found in flocks of wild birds in Delaware and Florida this week, officials said. The Delaware Department of Agriculture on Wednesday said that testing confirmed that cases of avian flu were discovered in a Delaware chicken flock. “We have taken immediate action to contain this disease and will continue to work with poultry owners, the industry, and our laboratory partners to protect against its spread,” Michael T. Scuse, Delaware Secretary of Agriculture, told local media. He added: “This appears to be an isolated case, with no reports of disease among our chicken industry. Delmarva poultry is safe to eat, and consumers can be confident in the safety of their food.” The farm involved in the outbreak is under quarantine to stop the spread of avian influenza, identified as H5N1 in local media. It’s the first time that strain of bird flu has been …