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  • Title: [The significance of antibodies to Pasteurella haemolytica A1 in the colostrum of cows and blood serum of calves].
    Author: Schimmel D, Erler W, Diller R.
    Journal: Berl Munch Tierarztl Wochenschr; 1992 Mar 01; 105(3):87-9. PubMed ID: 1575671.
    Abstract:
    Antibodies to P. haemolytica were detected in colostral sera of cows and blood sera of calves by means of indirect haemagglutination (IHA) and ELISA. The ELISA titres of the colostral sera of the dams and of the blood sera of the calves showed a significantly positive correlation. There is a positive correlation between the titres of the two serological methods. The results of the challenge infection with P. haemolytica A 1 do not show a correlation between the titres and the severity of the disease. Heifer calves, however, developed more severe pneumonias than calves from older cows.
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