Predicting the probability of quarter infection (by major pathogens) from somatic cell concentration
1982
Poutrel, Bernard | Rainard, Pascal | Station de pathologie de la reproduction [Nouzilly] (Unité 84) ; Institut National de la Recherche Agronomique (INRA)
International audience
Afficher plus [+] Moins [-]anglais. The herd factor did not significantly affect distributions of somatic cell counts of 6,560 milk samples (collected in 3 herds) within an infection status. Minor-infections distribution for a herd was closer to that of healthy quarters than that of major infections. About 35% of the quarters infected by major pathogens had counts less than 400,000 cells/ml. Statistical analysis by conditional probability indicated that herd major-infection level should be taken into account to predict the probability of quarter infection by major pathogens. Discrimination with a good reliability between presence and absence of pathogens, as estimated by a single somatic cell count, is possible only in herds with high major-infection level.
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