credits bmbl December 7 '06.doc - Central Michigan University

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Appendix B minimum and are “sight sealed.” Verification of the seals is usually not required for most BSL-3 laboratories. The BSL-4 laboratory design requires interior surfaces that are water resistant AND sealed to facilitate fumigation. These seals must be tested and verified to ensure containment in order to permit both liquid disinfection and fumigation. Periodic fumigation is required in the BSL-4 suit laboratory to allow routine maintenance and certification of equipment. Procedures for decontamination of large spaces such as incubators or rooms are varied and influenced significantly by the type of etiologic agent involved, the characteristics of the structure containing the space, and the materials present in the space. The primary methods for space decontamination are: Formaldehyde—Paraformaldehyde Formaldehyde gas at a concentration of 0.3 grams/cubic foot for four hours is often used for space decontamination. Gaseous formaldehyde can be generated by heating flake paraformaldehyde (0.3 grams per cubic foot) in a frying pan, thereby converting it to formaldehyde gas. The humidity must be controlled and the system works optimally at 80% relative humidity. This method is effective in killing microorganisms but toxicity issues are present. 1,9 Additional information on environmental and safety issues related to paraformaldehyde is available from the EPA at: www.epa.gov/pesticides. Hydrogen Peroxide Vapor Hydrogen peroxide can be vaporized and used for the decontamination of glove boxes as well as small room areas. Vapor phase hydrogen peroxide has been shown to be an effective sporicide at concentrations ranging from 0.5 mg/L to
Appendix B dioxide gas exits the generator at a modest positive pressure and flow rate, the enclosure also need not be evacuated and could be a sterility-testing isolator, a glove box or sealed BSC, or even a small room that could be sealed to prevent gas egress. 15 Chlorine dioxide gas is rapidly broken down by light; care must be taken to eliminate light sources in spaces to be decontaminated. Decontamination of Surfaces Liquid chemical germicides formulated as disinfectants may be used for decontamination of large areas. The usual procedure is to flood the area with a disinfectant for periods up to several hours. This approach is messy and with some of the disinfectants used represents a toxic hazard to laboratory staff. For example, most of the “high-level” disinfectants on the United States market are formulated to use on instruments and medical devices and not on environmental surfaces. Intermediate and low-level disinfectants are formulated to use on fomites and environmental surfaces but lack the potency of a high-level disinfectant. For the most part intermediate and low level disinfectants can be safely used and, as with all disinfectants, the manufacturer’s instructions should be closely followed. 7 Disinfectants that have been used for decontamination include sodium hypochlorite solutions at concentrations of 500 to 6000 parts per million (ppm), oxidative disinfectants such as hydrogen peroxide and peracetic acid, phenols, and iodophors. Concentrations and exposure times vary depending on the formulation and the manufacturer’s instructions for use. 6,16 See Table 2 for a list of chemical germicides and their activity levels. A spill control plan must be available in the laboratory. This plan should include the rationale for selection of the disinfecting agent, the approach to its application, contact time and other parameters. Agents requiring BSL-3 and BSL-4 containment pose a high risk to workers and possibly to the environment and should be managed by well-informed professional staff trained and equipped to work with concentrated material. 351
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Biosafety in Microbiological and Bi
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SECTION VIII-H: Prion Diseases 299
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Forward Biosafety in Microbiologica
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Editors: L. Casey Chosewood, MD Dir
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Guest Editors: Matthew J. Arduino,
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Charles B. Millard, PhD Lieutenant
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Robert Bull Karen B. Byers Jane Cap
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Thomas L. Miller Douglas M. Moore M
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Robert Yarchoan Uri Yokel Lisa Youn
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Introduction laboratories chose not
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Introduction RISK CRITERIA FOR ESTA
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Introduction BMBL includes an impor
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Section II Biological Risk Assessme
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Biological Risk Assessment informat
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Biological Risk Assessment The NIH
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Biological Risk Assessment effectiv
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Biological Risk Assessment Third, m
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Biological Risk Assessment 14. Oxma
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Principles of Biosafety Safety equi
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Principles of Biosafety Often an in
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Principles of Biosafety Four standa
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Principles of Biosafety 4. Centers
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Laboratory Biosafety Level Criteria
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Section V Vertebrate Animal Biosafe
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Vertebrate Animal Biosafety Level C
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TABLE 1 SUMMARY OF RECOMMENDED BIOS
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Principles of Laboratory Biosecurit
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Occupational Health and Immunoproph
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Agent Summary Statements - Bacteria
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• Section VIII-B: Fungal Agents A
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Agent Summary Statements - Fungal A
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• Section VIII-C: Parasitic Agent
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Agent Summary Statements - Parasiti
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• Section VIII-D: Rickettsial Age
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Agent Summary Statements - Ricketts
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Agent Summary Statements - Ricketts
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• Section VIII-E: Viral Agents Ag
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Agent Summary Statements - Viral Ag
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• Section VIII-G: Toxin Agents Se
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Agent Summary Statements - Toxins i
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Agent Summary Statements - Toxins A
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Agent Summary Statements - Toxins L
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Agent Summary Statements - Toxins t
Page 299 and 300: • Section VIII-H: Prion Diseases
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Page 307 and 308: Appendix A Proper maintenance of ca
Page 309 and 310: Appendix A declined. However, in ma
Page 311 and 312: Appendix A It is possible to exhaus
Page 313 and 314: Appendix A 4. The Class II, Type A2
Page 315 and 316: Appendix A prohibited. Furthermore,
Page 317 and 318: Appendix A plastic wrappers, pipett
Page 319 and 320: Appendix A touch-plate microburners
Page 321 and 322: Appendix A SECTION VI FACILITY AND
Page 323 and 324: Appendix A Development of Containme
Page 325 and 326: Appendix A C. Airflow Smoke Pattern
Page 327 and 328: Appendix A TABLES Table 1. Selectio
Page 329 and 330: Appendix A Table 3. Field Performan
Page 331 and 332: Appendix A FIGURES Figure 1. HEPA f
Page 333 and 334: Appendix A Figure 3. The Class II,
Page 335 and 336: Appendix A Figure 5B. The Class II,
Page 337 and 338: Appendix A Figure 8. The Class III
Page 339 and 340: Appendix A Figure 9B. The vertical
Page 341 and 342: Appendix A Figure 11. A typical lay
Page 343 and 344: Appendix A REFERENCES 1. Centers fo
Page 345 and 346: Appendix B Decontamination and Disi
Page 347 and 348: Appendix B surfaces are contaminate
Page 349: Appendix B TABLE 1 DESCENDING ORDER
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Page 355 and 356: Appendix C Transportation of Infect
Page 357 and 358: Appendix C 1600 Clifton Road, N.E.,
Page 359 and 360: Appendix C disease in humans or in
Page 361 and 362: Appendix C Biological specimen, Cat
Page 363 and 364: Appendix D Agriculture Pathogen Bio
Page 365 and 366: Appendix D simultaneous opening of
Page 367 and 368: Appendix D 14. Pathological inciner
Page 369 and 370: Appendix D Wastes and other materia
Page 371 and 372: Appendix D Camelpox virus b a, b, c
Page 373 and 374: Appendix D SPECIAL ISSUES The impor
Page 375 and 376: Appendix D required by the USDA and
Page 377 and 378: Appendix D depression, anorexia, an
Page 379 and 380: Appendix D laboratory with enhancem
Page 381 and 382: Appendix D five day period of conta
Page 383 and 384: Appendix D slaughterhouses or indus
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Page 387 and 388: Appendix D NDV is classified in the
Page 389 and 390: Appendix D movement permit is requi
Page 391 and 392: Appendix D Spring Viremia of Carp V
Page 393 and 394: Appendix D REFERENCES 1. Hess WR. A
Page 395 and 396: Appendix D 37. Alexander DJ. Newcas
Page 397 and 398: Appendix E Arthropod Containment Gu
Page 399 and 400: Appendix F Select Agents and Toxins
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Appendix G IPM issues and requireme
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Appendix H Working with Human, NHP
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Appendix I Guidelines for Work with
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decontaminated periodically, for ex
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0.25N, and/or sodium hypochlorite (
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k Irradiation causes a dose-depende
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7. Morin R, Kozlovac J. Biological
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Appendix J NIH Oversight of Researc
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Appendix K Resources for Informatio
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Appendix K E-mail: http://www2.gsu.
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Appendix K and http://www.who.int/c
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Appendix L HEPA High Efficiency Par
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