Transmission of hepatitis A has been described in many settings, although few outbreaks have been reported among illicit drug users. We report six unrelated outbreaks of hepatitis A among users of marijuana and intravenously administered methamphetamine. Although the exact mode of transmission could not be IntroductionOutbreaks of hepatitis A infection have resulted from common-source food and water-borne transmission and from

No abstract

The authors studied the reporting of shigellosis in Oklahoma to evaluate the sensitivity of the state-based passive surveillance system for shigellosis. They found that passive surveillance for shigellosis can be more sensitive than has been previously observed. Laboratory-based reporting was found to be far superior to reporting by physicians.