1. WHO handbook for guideline development. Geneva: World Health Organization, 2012.
2. Laboratory biosafety manual, 3rd edition. Geneva: World Health Organization, 2004 (WHO/CDS/CSR/LYO/2004.11). (Also available from http://www.who.int/csr/resources/publications/biosafety/en/Biosafety7.pdf.)
3. Laboratory biorisk management standard: CEN workshop agreement. Brussels, European Committee for Standardization, 2008 (CWA 15793:2008). (Also available from ftp://ftp.cenorm.be/public/CWAs/wokrshop31/CWA15793.pdf.)
4. Styblo K. Epidemiology of tuberculosis. The Hague, Royal Netherlands Tuberculosis Association, 1991.
5. Olsen AM et al. Infectiousness of tuberculosis. American Review of Respiratory Disease, 1967, 96:836–870.
6. Qian Y et al. Performance of N95 respirators: reaerosolization of bacteria and solid particles. AIHA Journal, 1997, 58:876–880.
7. Segal-Maurer S, Kalkut GE. Environmental control of tuberculosis: continuing controversy. Clinical Infectious Diseases, 1994, 19:299–308.
8. Miller JM et al. Guidelines for safe work practices in human and animal medical diagnostic laboratories: recommendations of a CDC-convened, biosafety blue ribbon panel. MMWR Surveillance Summaries, 2012, 61(Suppl.):1-102.
9. Rieder L et al. Priorities for tuberculosis bacteriology services in low-income countries, 2nd ed. Paris, International Union Against Tuberculosis and Lung Disease. 2007.
10. Kim SJ et al. Risk of occupational tuberculosis in national tuberculosis programme laboratories in Korea. International Journal of Tuberculosis and Lung Diseases, 2007, 11:138–142.
11. Laboratory services in tuberculosis control. Part II: microscopy. Geneva, World Health Organization, 2008 (WHO/TB/98.258).
12. Acid-fast direct smear microscopy training package. Atlanta, GA, Centers for Disease Control and Prevention, 2006 (http://wwwn.cdc.gov/dls/ila/acidfasttraining, accessed 12 October 2012).
13. Five steps to risk assessment. London, Health and Safety Executive, 2011. (Also available from http://www.hse.gov.uk/risk/expert.htm.)
14. Collins HC. Laboratory-acquired infections, 2nd ed. London, Butterworth, 1988.
15. Rieder HL et al. The public health service national tuberculosis reference laboratory and the national laboratory network: minimum requirements, role and operation in a low-income country. Paris, International Union Against Tuberculosis and Lung Disease, 1998.
16. Tuberculosis infection-control in the era of expanding HIV care and treatment: addendum to WHO guidelines for the prevention of tuberculosis in health care facilities in resource-limited settings. Geneva, World Health Organization, 1999 (Also available from http://whqlibdoc.who.int/hq/1999/WHO_TB_99.269_ADD_eng.pdf.)
17. Ventilated workstation manual for AFB smear microscopy: manufacturing, validation and user guide. Silver Spring, MD, Association of Public Health Laboratories, 2011 (http://www.aphl.org/aphlprograms/global/Documents/GH_2011July_VentilatedWorkstationGuidance.pdf, accessed 12 October 2012).
18. Standards Australia International. AS/NZS2252.1:1994, Biological safety cabinets – biological safety cabinets (Class I) for personal and environment protection. Sydney, Standards Australia International, 1994.
19. Standards Australia International. AS/NZS 2252.2:1994, Biological safety cabinets – laminar flow biological safety cabinets (Class II) for personnel, environment and product protection, Sydney, Standards Australia International, 1994.
20. NSF/ANSI 49 – 2008. Biosafety cabinetry: design, construction, performance, and field certification. Ann Arbor, MI, NSF International, 2008.(Also available from http://standards.nsf.org/apps/group_public/download.php/3604/NSF_49-08e-rep-watermarked.pdf.)
21. BS EN 12469:2000. Biotechnology: Performance criteria for microbiological safety cabinets. London, British Standards Institution,2000.