Results of serological investigations on patients with joint pain, art
hralgia or polyarthritis were analysed and this information was used t
o develop a diagnostic algorithm to ensure optimal utilisation of labo
ratory resources. Accordingly, all cases are now examined for parvovir
us IgM, mycoplasma IgM and streptococcal antibodies. Further tests are
undertaken by following the algorithm after obtaining supplementary i
nformation from a questionnaire. This approach is put forward as a pre
liminary standard which other laboratories may like to evaluate and de
velop according to local requirements.