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Related Concept Videos

Infection01:20

Infection

When a pathogen enters the body and reproduces, it can cause an infection, damage body cells, and cause illness symptoms that eventually lead to disease. Therefore, its prevention requires breaking the chain of infection.
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Principles of Disease Surveillance01:26

Principles of Disease Surveillance

Disease surveillance is the systematic collection, analysis, and interpretation of health data essential to the planning, implementation, and evaluation of public health practice. This process integrates data dissemination to entities responsible for preventing and controlling disease, injury, and disability. Surveillance systems provide crucial information for action, helping public health authorities make informed decisions to manage and prevent outbreaks, ensure public safety, optimize...
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Infectious Diseases and Their Occurrence

Infectious diseases appear in populations through various transmission patterns, influenced by pathogen characteristics, population immunity, environmental conditions, and social behavior. Understanding these patterns is essential for effective public health surveillance and intervention. These categories—sporadic, outbreak, epidemic, pandemic, and endemic—help frame the nature and scope of disease events.Sporadic diseases occur irregularly and infrequently, without a predictable temporal or...
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Investigation of Disease Outbreaks

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Updated: May 10, 2026

Detecting the Lyme Disease Spirochete, Borrelia Burgdorferi, in Ticks Using Nested PCR
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Published on: February 4, 2018

Tracing a syphilis outbreak through cyberspace.

J D Klausner1, W Wolf, L Fischer-Ponce

  • 1STD Services, 1360 Mission St, Suite 401, San Francisco, CA 94103, USA. jeff_klausner@dph.sf.ca.us

JAMA
|July 25, 2000
PubMed
Summary
This summary is machine-generated.

Meeting sexual partners online was linked to syphilis spread among gay men. Public health must adapt disease control to new digital venues while balancing privacy and safety.

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Area of Science:

  • Public Health
  • Epidemiology
  • Infectious Disease Control

Background:

  • Syphilis outbreak among Internet chat room users challenged traditional partner notification.
  • Limited partner information (screen names) and privacy concerns hindered contact tracing.
  • Traditional public health methods were insufficient for digitally-mediated sexual networks.

Purpose of the Study:

  • To investigate the association between Internet use and syphilis acquisition.
  • To describe innovative partner notification strategies in online environments.
  • To understand the epidemiology of syphilis within a cyber-connected population.

Main Methods:

  • Conducted an outbreak investigation of early syphilis among gay men linked to an online chat room.
  • Performed a case-control study comparing syphilis cases with controls.
  • Analyzed Internet use patterns and partner notification effectiveness.

Main Results:

  • Individuals who met sexual partners online were significantly more likely to acquire syphilis (67% vs 19%).
  • The odds ratio for syphilis acquisition linked to Internet use was 8.7 (P =.03).
  • 42% of named partners were notified and tested; an average of 5.9 partners were evaluated per case.

Conclusions:

  • Internet-based partner acquisition is associated with syphilis transmission among gay men.
  • Public health strategies require adaptation to address disease control in new digital venues.
  • Balancing individual privacy rights with public health protection is crucial in cyberspace.