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P Perreau

Publications and source records attributed to P Perreau.

54 records · Page 3Linked to original sources
PubMedDate not supplied

[Experimental infection in goats caused by mycoplasma strain F.38 (contagious caprine pleuropneumonia)].

The contagious pleuropneumonia syndrome is easily reproduced in goats, using cultures and lung lesion homogeneizate, given by endobronchial inoculation and by aerosol. The latter route causes hyperacure evolution, with septicaemia, multiple and disseminated lesions and death within three days following the onset of clinical signs. The same strains seem to be poorly pathogenic toward chick embryos inoculated in the yolk-sac. The nature of Mycoplasma capripneumoniae pathogenicity remains undetermined.

Aerosols↗
PubMedDate not supplied

Haemagglutinating properties of Pasteurella multocida type A strains isolated from rabbits and poultry.

Thirty-one type A strains of Pasteurella multocida isolated from rabbits and poultry were able to agglutinate red blood cells (RBC) from human group O donors. Except for human RBC from group B which were also agglutinated by 3 strains, neither group A nor RBC from sheep and rabbits were agglutinated. Haemagglutination was mannose-resistant, and the two techniques used detected unrelated activities. One as tested by a slide haemagglutination (MRSH) test was common to most (31 out of 34 strains) capsulated strains, though non-mucoid ones obtained by growth on hyaluronidase-containing medium showed also this property. This haemagglutination activity was destroyed at 100 degrees C for 15 min but not at 56 degrees C for 30 min, was dependent upon an optimal pH range (7.4-7.5) and did not seem to be influenced by different enriched media. The other activity was assayed by the microhaemagglutination (MRMH) test. Only part (19 out of 34 strains) of the strains presented this activity, which was also destroyed by boiling for 15 min and was dependent on the addition of 0.5 of polyvinilpirrolidone to phosphate buffered saline, used to suspend RBC. A correlation between haemagglutination activities of P. multocida type A and the possibility of this microorganism harbouring fimbriate organelles is discussed.

ABO Blood-Group System↗