McHenry County Department of Health - Emergency Preparedness & Response
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Bioterrorism & Bioterrorism Agents

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What is Bioterrorism?

 bioterror transBioterrorism is the unlawful release of a biological agent (bacteria, viruses or toxins) with the intent to intimidate or coerce a government or civilian population to further political or social objectives. Humans, animals and plants can be sickened or killed by the biological agent used in the attack.

A biological agent can usually be found in nature; however, a terrorist might modify the agent to increase its ability to cause disease, make it resistant to current medicines or to increase its ability to be spread into the environment.  Some bioterrorism agents, like the smallpox virus, can be spread from person to person and some, like anthrax, cannot. A bioterrorism attack may go undetected until people started to show signs and symptoms compatible with illnesses caused by an agent.  It could take several hours to several days for signs and symptoms to appear.

Doctors, hospitals and public health professionals are likely to detect bioterrorism before traditional first responders (Police, Fire or EMS).  If a bioterrorism attack is identified quickly, public health workers will be able to control it much faster and reduce the number of people infected.  An unusual number of patients with similar illnesses in a given location or illnesses seen in unusual populations (i.e. the chicken pox virus seen in adults) might make public health officials suspicious that a bioterrorism event has occurred.

Category A Diseases and Agents

bioterror trans 2The U.S. public health system and primary healthcare providers must be prepared to address various biological agents, including pathogens that are rarely seen in the United States. High-priority (Category A) agents Include organisms that pose a risk to national security because they:

  • Can be easily disseminated or transmitted from person to person;
  • Result in high mortality rates and have the potential for major public health impact;
  • Might cause public panic and social disruption
  • Require special action for public health preparedness

The Category A Diseases and Agents are:

Category B Diseases and Agents

The second highest priority agents include those that:

  • Are moderately easy to disseminate
  • Result in moderate morbidity rates and low mortality rates
  • Require specific enhancements of CDC's diagnostic capacity and enhanced disease surveillance

The Category B Diseases and Agents are:

View a complete list of all Category A, B and C Diseases/Agents.

(Source: Centers for Disease Control and Prevention)

For More Information on Biological Terrorism Visit the Following Links: