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Tuberculosis laboratory biosafety manual
  • Published Date:
    2012
Filetype[PDF-22.83 MB]


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Tuberculosis laboratory biosafety manual
Details:
  • Corporate Authors:
    World Health Organization, Communivable Diseases Cluster., Stop TB Department. ; Centers for Disease Control and Prevention (U.S.) ; United States, Agency for International Development
  • Description:
    Executive summary -- Participants in the guideline development process -- Abbreviations -- Introduction -- 1. Risk assessment and the classification of TB laboratories -- 2. Essential biosafety measures for TB laboratories -- 3. Low-risk TB laboratories -- 4. Moderate-risk TB laboratories -- 5. High-risk TB laboratories (TB -containment laboratories -- 6. Safety equipment -- 7. Personal protective equipment and clothing -- 8. Plans for emergency preparedness and response -- 9. References -- Annex 1: Meeting participants -- Annex 2: Declarations of interest -- Annex 3: Peer review panel.

    Following a technical consultation held between the World Health Organization (WHO) and the United States Centers for Disease Control and Prevention (CDC) in Atlanta, GA, in September 2008 on strategies, approaches and partnerships that could be implemented to improve laboratory biosafety worldwide, an Expert Group meeting was convened at WHO's Headquarters in Geneva, Switzerland, in April 2009 to elaborate guidance on biosafety related to laboratory procedures for diagnosing tuberculosis (TB). Members of the Expert Group submitted Declarations of Interest. These were reviewed by WHO's legal department prior to the meeting. The purpose of the meeting was to reach consensus on the basic principles of laboratory practices and design necessary to establish minimum criteria to ensure biosafety during TB microscopy, culture, drug-susceptibility testing (DST) and molecular testing in different countries and epidemiological settings. This manual was developed from the Expert Group meeting. The recommendations are based on assessments of the risks associated with different technical procedures performed in different types of TB laboratories; the manual describes the basic requirements for facilities and practices, which can be adapted to follow local or national regulations or as the result of a risk assessment. Risk assessments require careful judgement: on the one hand, underestimating risks may lead to laboratory staff being exposed to biological hazards but, on the other hand, implementing more rigorous risk mitigation measures than are needed may result in an unnecessary burden on laboratory staff and higher costs to establish and maintain the laboratory's infrastructure. Risk assessments should consider the bacterial load of materials (such as specimens and cultures), the viability of the bacilli, whether the material handled is prone to generate aerosols during the activity being assessed, the laboratory's workload, the epidemiology of the disease, and the health of laboratory workers; assessments should also consider other factors that may infl uence the likelihood or the consequence of exposure to TB. The intended audience for these recommendations are directors and managers of laboratories and TB programmes as well as the laboratory technicians who test for TB, especially in high-burden, lowresource settings. In this document, the laboratory or section of the laboratory conducting TB testing is referred to as the TB laboratory. The recommendations are specifi c to laboratories that follow well defi ned procedures to test samples potentially containing Mycobacterium tuberculosis. For any other combination of pathogen and procedures, a process similar to the one used here could be used to defi ne biosafety precautions. This manual was approved by WHO's Guidelines Review Committee in May 2012, and explanations are provided throughout the manual where it differs from WHO's Laboratory biosafety manual, 3rd edition. It is intended to inform rather than replace country-level requirements and standards for biosafety. The recommendations do not supersede any local or national rules or regulations.

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