Biodiversity loss, global warming, pollution and the spread of invasive species are making infectious diseases more dangerous to organisms around the world.
White-footed mice, the primary reservoir for Lyme disease, have become more dominant in the U.S. as other rarer mammals have disappeared, one potential explanation for rising disease rates.
People with two copies of the gene variant APOE4 are almost certain to get Alzheimerβs, say researchers, who proposed a framework under which such patients could be diagnosed years before symptoms.
The Food and Drug Administration said regulators had examined 201 commercial dairy samples, including milk, cottage cheese and sour cream, and had so far not found evidence that potentially infectious virus was on grocery shelves.
Despite an arsenal of drugs, many Americans are still unaware of their infections until itβs too late. A Biden initiative languishes without Congressional approval.
Dr. Sanjeev Arora, a gastroenterologist in Albuquerque, founded Project ECHO in the early 2000s to connect primary care doctors in sparsely populated areas with specialists. ECHOβs New Mexico hepatitis C program has provided treatment for more than 10,000 patients.
The C.D.C. maintained Wednesday that the risk for the public was still low, with no changes in the genetic makeup of the virus that would allow it to spread more easily to or between humans.
The U.S.D.A. announced last month that dairy cattle in Texas and Kansas had tested positive for the bird flu virus, called H5N1. It has since reported cases in dozens of herds in eight states.
H5N1, an avian flu virus, has killed tens of thousands of marine mammals, and infiltrated American livestock for the first time. Scientists are working quickly to assess how it is evolving and how much of a risk it poses to humans.
So far, bird flu in cattle seems to affect only lactating cows, and only temporarily. There have been no diagnoses in calves, pregnant heifers or beef cows, and no deaths.
Mammography can miss tumors in women with dense breasts, so their doctors often include ultrasound or M.R.I. scans. Patients often wind up paying the bill.
Kenneth Davis, a patient in an H.I.V. treatment trial, undergoes a routine exam with the assistance of Phoebe Bryson-Cahn, a research clinician, at Harborview Medical Center in Seattle.
A public research institute in Brazil has proved a new shot protects against the disease, but canβt make it fast enough to stop the huge outbreak sweeping Latin America.
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