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

SECTION VIII-H: Prion Diseases 299
Table 1. The Human Prion Diseases 300
Table 2. The Animal Prion Diseases 300
Table 3. Tissue Preparation for Human CJD and
Related Diseases 304
Table 4. Prion Inactivation Methods for Reusable
Instruments and Surfaces 304
APPENDIX A: Primary Containment for Biohazards: Selection,
Installation and Use of Biological Safety Cabinets 306
Table 1. Selection of a Safety Cabinet through
Risk Assessment 327
Table 2. Comparison of Biosafety Cabinet
Characteristics 328
Table 3. Field Performance Tests to be Applied
to the Three Classes of Biological Safety
Cabinets
329
Table 4. Reference for Applicable Containment Tests 330
Figure 1. HEPA filters are typically constructed
of paper-thin sheets of borosilicate medium,
pleated to increase surface area, and affixed to a
frame. Aluminum separators are often added
for stability. 331
Figure 2. The Class I BSC. 332
Figure 3. The Class II, Type A1 BSC. 333
Figure 4. Canopy (thimble) unit for ducting a
Class II, Type A BSC. 334
Figure 5A. The Class II, Type B1 BSC (classic design).334
Figure 5B. The Class II, Type B1 BSC
(bench top design). 335
Figure 6. The Class II, Type B2 BSC. 336
Figure 7. The tabletop model of a Class II,
Type A2 BSC. 336
Figure 8. The Class III BSC. A. 337
Figure 9A. The horizontal laminar flow “clean bench.” 338
Figure 9B. The vertical laminar flow “clean bench.” 339
Figure 10. A modified containment cabinet or
Class I BSC can be used for labeling infectious
microorganisms with I 125. 340
Figure 11. A typical layout for working
“clean to dirty” within a Class II BSC. 341
Figure 12. One method to protect a house
vacuum system during aspiration of
infectious fluids. 341
Figure 13. A bag-in-bag-out filter enclosure
Allows for the removal of the contaminated