A mosquito-borne virus more common in South America has been detected in the United States. Health officials say the chikungunya virus has been identified in a patient living in the suburbs of New York City who began experiencing symptoms in August. Authorities say it's the first locally acquired case identified in any state since 2015, meaning the patient didn't travel outside the country before becoming infected. It's also the first locally acquired case that New York has ever seen. Chikungunya typically produces symptoms including fever, muscle pain, nausea, fatigue and a rash.

A Maryland resident who traveled to El Salvador has been diagnosed with New World screwworm. It's the first reported U.S. case tied to travel to a country with a current outbreak. The Centers for Disease Control and Prevention confirmed the diagnosis three weeks ago. Federal health officials acknowledged the infection in an emailed statement Monday. Health officials say the parasite does not spread from person to person and that the risk to the public is very low.

The death of an Oregon house cat from bird flu and a pet food recall are raising questions about how people can protect their pets. Oregon health officials have traced the cat's illness to frozen cat food that contained raw turkey. Some pet owners feed their animals raw meat, but that can be dangerous, even fatal for the animals. Cooking destroys the bird flu virus and other disease-causing germs. Cats seem more susceptible than dogs to the bird flu virus. But the best advice for pet owners is to avoid feeding animals raw protein.

New Hampshire health authorities are reporting the death of a person who tested positive for the mosquito-borne eastern equine encephalitis virus. The Hampstead resident's infection was the first in the state in a decade. The New Hampshire Department of Health and Human Services says the person had severe central nervous system symptoms. There is no vaccine or antiviral treatment available. The U.S. Centers for Disease Control and Prevention says about a third of people who develop encephalitis from the virus die, and survivors can suffer lifelong mental and physical disabilities. There are typically about 11 human cases of eastern equine encephalitis in the U.S. per year.

A fourth dairy worker in the U.S. has been infected with bird flu. Health officials said Wednesday that the worker in Colorado had an eye infection and has since recovered. The man worked on a farm in Colorado and had direct contact with infected cows. Three previous cases of human infection linked to cows were reported in dairy workers in Texas and Michigan this year. As of Wednesday, the Agriculture Department says more than 135 dairy herds in a dozen states had reported infections with bird flu that originated in poultry.