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  • Title: Update on the diagnosis of Haemophilus parasuis infection in pigs and novel genotyping methods.
    Author: Olvera A, Segalés J, Aragón V.
    Journal: Vet J; 2007 Nov; 174(3):522-9. PubMed ID: 17175186.
    Abstract:
    Haemophilus parasuis causes Glässer's disease as well as a number of other diseases in pigs. The diagnosis of H. parasuis-associated disease is usually established by clinical signs, pathological findings and bacterial isolation but diagnosis is complicated by the existence of non-virulent strains and the early colonisation of the upper respiratory tract of healthy piglets. Moreover, several strains can be found on a farm and even within a single animal so it is important to determine the specific strain that is causing the clinical outbreak. Recently, genotyping methods have been developed with the goal of correlating genotype with the degree of virulence of H. parasuis strains. The association between genotype and virulence in H. parasuis is challenging due to the lack of knowledge of the complete genomic sequence and virulence factors of this bacterium.
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