1. Health & Medicine

    Virulent bacterium’s DNA is sequenced

    The completed genome sequence of Staphylococcus aureus reveals transfers from other organisms of many of the antibiotic-resistance and virulence genes.

  2. Health & Medicine

    Death of a theory

    Three separate analyses of oral polio vaccine used in the 1950s in Africa deflate the theory that such a vaccine could have ignited the AIDS epidemic by containing virus-infected chimpanzee cells.

  3. Health & Medicine

    Gene therapy cures blindness in dogs

    Gene therapy to replace a defective RPE65 gene succeeds in bringing sight to three blind dogs, suggesting such therapy might reverse Leber congenital amauosis, a rare condition in which children are blind from birth.

  4. Health & Medicine

    New anthrax treatment works in rats

    By distorting a protein in the toxin that makes the anthrax bacterium deadly, scientists have discovered a promising way to treat the disease and possibly even to prevent it with a vaccine.

  5. Health & Medicine

    Tamoxifen dilates arteries in men

    The breast cancer drug tamoxifen can widen a narrowed coronary artery in men with heart problems.

  6. Health & Medicine

    Long-term ecstasy use impairs memory

    Extended use of the illicit drug called MDMA or ecstasy exacerbated memory problems in users aged 17 to 31, none of whom reported alcohol dependence.

  7. Health & Medicine

    Peptide puts mouse arthritis out of joint

    A compound called vasointestinal peptide, which binds to immune system T cells and macrophages, thwarts arthritis in mice.

  8. Health & Medicine

    Epileptic seizures may be predictable

    Patterns of mild electrical disturbance in the brains of epilepsy patients appear to foreshadow a seizure hours before its onset.

  9. Health & Medicine

    Anthrax Threat

  10. Health & Medicine

    Novel typhoid vaccine surpasses old ones

    A new vaccine links a sugar molecule found on the surface of the bacterium that causes typhoid fever with a genetically engineered version of the exotoxin protein, which arouses the immune system to churn out antibodies against the bacterium.

  11. Anthropology

    Peru Holds Oldest New World City

    Construction of massive ceremonial buildings and residential areas at a Peruvian site began 4,000 years ago, making it the earliest known city in the Americas.

  12. Health & Medicine

    Germ-killing plastic wrap