Confusion over leadership of US bioterrorism research.
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Fear that terrorists can use biological agents as weapons of mass destruction is significantly impacting the conduct of microbiological research. Abundant new funds are available for biodefence research, and many researchers are racing to enter the field. There are some concerns, however, that a large emphasis on this issue could skew the microbiology research agenda. Furthermore, new responsibilities for safely conducting research with biothreat agents and concern that information might be misused could drive some researchers away from the field.
Never before has there been such a strong possibility that biological agents might be used indiscriminately on civilian populations. This review focuses on the use of antitoxins - antibodies, receptor decoys, dominant-negative inhibitors of translocation, small-molecule inhibitors and substrate analogues - to counteract those biological weapons for which toxins are an important mechanism of disease pathogenesis.
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Biological weapons and biological terrorism have recently come into focus due to the deliberate release of Bacillus anthracis via mail delivered in the USA. Since the 1930s, biological weapons have been developed in a number of countries. In 1975, the Biological and Toxin Weapons Convention entered into force; this prohibits the use of these weapons and has been signed by a large majority of countries (144). Unfortunately, several countries failed to respect this treaty. The Soviet Union continued and expanded its biological weapons program, and after the Gulf War it was revealed that Iraq also had an extensive biological weapons program. Large-scale deliberate release of, Bacillus anthracis, for example, or an epidemic following a release of smallpox virus, would have a devastating effect. This has motivated the world community to strengthen the Biological and Toxin Weapons Convention with a control mechanism which has, as yet, not been successful. Sweden, like other countries, is enhancing its preparedness with regard to stocks of antibiotics and vaccines, related to these improving the diagnostics these and similar agents, and is setting up an epidemiologic task force that can be used in infectious disease emergencies such as the deliberate release of biological warfare agents. International cooperation in this area has to be enhanced, not least in the European Union.
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The use of biological weapons has been recorded throughout history. However, the anthrax-tainted letters of the fall of 2001 caused shock and panic in several countries. Knowledge of the principal bacteriological weapons allows design of novel rapid DNA-based diagnostic tests that should help defuse the impact of future bioterrorist attacks. Less than one-hour real-time PCR identification of bacteria and their associated antibiotic resistance genes will revolutionize the practice of medicine.
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The use of microorganisms as agents of biological warfare is considered inevitable for several reasons, including ease of production and dispersion, delayed onset, ability to cause high rates of morbidity and mortality, and difficulty in diagnosis. Biological agents that have been identified as posing the greatest threat are variola major (smallpox), Bacillus anthracis (anthrax), Yersinia pestis (plague), Clostridium botulinum toxin (botulism), Francisella tularensis (tularaemia), filoviruses (Ebola hemorrrhagic fever and Marburg hemorrhagic fever), and arenaviruses Lassa (Lassa fever) and Junin (Argentine hemorrhagic fever). The pathogenesis, clinical manifestations, diagnosis, and treatment of these agents are discussed. Rapid identification and diagnosis using molecular diagnostic techniques such as PCR is an essential element in the establishment of coordinated laboratory response systems and is the focus of current research and development. Molecular techniques for detection and identification of these organisms are reviewed.
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