Comparison of protein patterns between invasive and non-invasive ovine strains of Chlamydia psittaci.

Protein patterns displayed in sodium dodecyl sulphate (SDS) electrophoresis by invasive and noninvasive strains of Chlamydia psittaci showed three constant differences, the most distinctive being a band at 90 Kd from invasive strains. In comparison with other methods so far described, this method provides a more efficient means of differentiating between invasive and non-invasive strains. Furthermore, it may lead to the development of improved methods of diagnosis.