L.A. County health officials investigate and confirm an infection outbreak inside one of the county's hospitals once or twice a month. The public rarely finds out which hospital is involved, how many patients were stricken or whether any died. The secrecy surrounding hospital outbreaks runs counter to the push toward more public disclosure in healthcare. In recent years, consumers have benefited from data comparing some health outcomes by hospital, the fees hospitals charge for various procedures and the payments doctors receive from drug and device manufacturers. Keeping outbreaks confidential is a common practice of federal, state and local health investigators across the country. The rationale: It encourages hospitals to be open and quickly report suspected surges of infections. The secrecy can prevent hospitals from learning from one another's mistakes. More than six years ago, a lethal bacteria struck two hospitals in Florida, killing 15 patients. The case was nearly identical to the recent outbreaks at UCLA and Cedars-Sinai medical centers. In each case, a hard-to-clean medical scope transferred the same superbug from patient to patient. Since that 2008 Florida outbreak, investigators have tied the same scopes to scores of patient infections in other states. Most of the outbreaks were not disclosed until months or years later, often only when doctors wrote about them in medical journals.