New biomolecular assays must be tested by direct study in the developing worldBMJ 1998; 316 doi: https://doi.org/10.1136/bmj.316.7135.940 (Published 21 March 1998) Cite this as: BMJ 1998;316:940
- F A Drobniewski, Director,
- S M Wilson, Deputy director
- PHLS Mycobacterium Reference Unit, Dulwich Public Health Laboratory, King's College School of Medicine, Dulwich Hospital, London SE22 8QF
EDITOR—Garner et al's editorial on appropriate diagnostics in developing countries is welcome to those who develop novel diagnostic systems for tuberculosis, which remains the most important infectious disease globally.1 Conventional diagnosis is difficult, and most developments have centred on molecular amplification techniques, often using the polymerase chain reaction, which are expensive and less sensitive than culture. 2 3 Ethical issues arise if precious samples such as cerebrospinal fluid are repeatedly subdivided for research.
Per capita healthcare spending in the developed world …