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  • Title: Dichelobacter nodosus serotype M fimbrial subunit gene: implications for serological classification.
    Author: Zhou H, Hickford JG.
    Journal: Vet Microbiol; 2001 Apr 19; 79(4):367-74. PubMed ID: 11267795.
    Abstract:
    Dichelobacter nodosus fimbrial subunit gene (fimA) from a serotype M strain (M-SPAHL) was investigated in this study. A primer set targeting the relatively conserved fimA regions and based on the published sequence from Nepalese serogroup M isolates (Nepalese M), failed to amplify the fimA of M-SPAHL. However, when the downstream primer was substituted with a primer that is specific for other serogroups of D. nodosus, the fimA was successfully amplified. Cloning followed by DNA sequencing, revealed that the M-SPAHL fimA was different to the Nepalese M fimA. The predicted amino acid sequence of the M-SPAHL fimA did not show homology to any known serogroups or serotypes. The most similar sequence was from serotype F1, and not Nepalese M. The consequences of serological relatedness and sequence dissimilarity are discussed.
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