By virtue of their training and experience these physicians
                  have a special interest in the detection of new or resurgent
                  infectious diseases. Such diseases may be new, e.g., diarrhea
                  caused by Cyclospora or bloodstream infections caused
                  by Bartonella henselae; or they may be known entities
                  whose incidence appears to be increasing, e.g., streptococcal
                  toxic shock syndrome, ehrlichiosis, or infections caused by
                  antimicrobial-resistant bacteria.
                  
The EIN is intended to function primarily as an "early
                  warning system" for the Centers for Disease Control and
                  Prevention (CDC) and other public health agencies by providing
                  information about unusual cases encountered in the clinical
                  practices of its members. It may also assist in outbreak
                  investigations, provide information on physician practices,
                  conduct investigations on the cause of certain illnesses, and
                  disseminate knowledge about new microbial threats.  See
                  more information about EIN in About Us.
                  
About
                  Membership
                  
All Infectious Diseases physicians who are either a member
                  of the IDSA or the Pediatric Infectious Diseases Society (PIDS)
                  and who see patients on a regular basis are encouraged to join
                  the IDSA EIN. The only requirement is willingness to complete
                  and return the periodic queries and, occasionally, an urgent
                  query. Both types of queries are designed for completion
                  within two minutes without chart review or other research. In
                  return, you will receive EIN reports, be able to provide input
                  on future surveys, and be added to the mailing list for the
                  CDC's journal, Emerging Infectious Diseases.
More intensive levels of participation, which are optional,
                  involve taking part in a CDC ongoing query or participating in
                  the electronic mail conference with other EIN members. We hope
                  that you will enlist to help us advance this unique Society
                  program.  
                  
                  For those interested in joining, please
                  fill out the online form.
                  
                  Anyone wishing to participate from
                  outside of North America is welcome to join; however,
                  membership status will be slightly different. Due to financial
                  restraints, international members will respond to periodic
                  queries and obtain report results via this web site.
                  International members will also receive the CDC's journal, Emerging
                  Infectious Diseases, but will not partake in urgent or
                  ongoing queries.
                  
                  For more information, please contact
                  Laura Liedtke, EIN program
                  coordinator.