[Serological typing of isolates of Pasteurella multocida from poultry and other animals in the Netherlands (author's transl)].

Pasteurella multocida isolates, isolated from poultry, birds and mammals in the Netherlands, were typed serologically. The standard sera were directed against Heddleston reference strains. Of the 202 isolates, 37.6 per cent were of type 1, 24.2 per cent of type 3, 2 per cent of type 5, 5.9 per cent of type 10 and 3.5 per cent of type 12. Cross reactions with two serotypes were shown by 18.8 per cent of the other isolates and with three serotypes by 3.5 per cent. The serotype of P. multocida isolates from several animals of the same flock on three farms was determined. Practically all the isolates from one and the same farm were found to be of the same serotype. The resulting prospects of serotyping for the use of vaccines are referred to.