Article Text

Differentiation of abortion-inducing and intestinal strains of Chlamydia psittaci isolated from ruminants by the microimmunofluorescence test
  1. A Souriau,
  2. E Le Rouzic,
  3. F Bernard and
  4. A Rodolakis


Forty-two isolates of Chlamydia psittaci from ruminants, principally from cases of abortion (21 strains) and from subclinical intestinal infections (13 strains), were serotyped by an indirect microimmunofluorescence test. The strains could be divided into the previously described serotypes 1 and 2. Strains causing abortion and intestinal strains belonged to two different serotypes: the abortion-inducing strains were mostly in serotype 1 whereas the intestinal strains were mostly in serotype 2. A close relationship was found between the serotypes and their invasiveness in mice.

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