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In April 1981, an outbreak of hepatitis A occurred among state legislators in Tennessee. Although the number of cases was small, we traced the source to a food handler who served cold meats and cheese. This investigation demonstrates the value of rapid serologic testing using a radioimmunoassay technique and matched case-control analysis to identify small foodborne outbreaks of hepatitis A.

We designed a special surveillance system to detect health complaints of visitors to the 1982 World's Fair. Heat-related illness occurred during the first month of the Fair but was substantially reduced by public education, environmental modification, and provision of additional water fountains. There was no disruption of emergency health services in the communities surrounding the Fair.Advance planning and the provision of on-site medical services can minimize the public health impact of large gatherings. (Am J Puiblic

No abstract

Background: Reports on acute tick-borne encephalitis virus (TBEV) infections with signs of neurologic disease in horses are limited.Objectives: To describe the epidemiological, clinical, and laboratory findings of suspected acute TBEV infections in 6 horses.Animals: Six horses originating from TBEV endemic regions of Switzerland were presented to equine hospitals with acute onset of neurologic disease between 2011 and 2019.Methods: Retrospective case series. Horses with acute onset of signs of neurologic disease that were subjected to clinical and microbiological examinations to rule out infectious diseases affecting the central nervous system.Results: All horses exhibited acute signs of neurologic disease including ataxia and proprioceptive deficits. Horses tested positive for TBEV using virus neutralization test and samples were further tested for TBEV-specific IgM. The presence of TBEVspecific IgM antibodies was confirmed in 5 horses (cases 1-5, Laboratory Unit[LU] values ranging from 30 to 56). One horse (case no. 6) with an LU value just below the test threshold (LU = 22.3) was also included under the hypothesis that the horse was transitioning from acute to chronic infection.