Identification of porcine Serpulina strains in routine diagnostic bacteriology |
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| Institution: | 1. College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China;2. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China;3. Division of Oncology Research, Mayo Clinic, Rochester, Minnesota 55905;4. Departments of Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic, Rochester, Minnesota 55905;5. Departments of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, Minnesota 55905;1. College of Materials Science and Engineering, Nanjing Tech University, 5 Xinmofan Road, Nanjing 210009, PR China;2. Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 210009, PR China;3. School of Materials Science and Engineering, Southeast University, Nanjing 211189, PR China |
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| Abstract: | Serpulina strains from pigs were identified using simple tests. The large size of S. hyodysenteriae in stainings from colonic contents and faeces was found useful for the presumptive differentiation of this major pathogenic species from the other Serpulinae. However, this morphological characteristic gets lost upon cultivation. The `ring phenomenon' aided to confirm the strong haemolysis typical for S. hyodysenteriae. The weakly haemolytic species S. innocens, S. pilosicoli, S. intermedia and S. hyodysenteriae could be differentiated with the help of the indole spot test and two or four other simple enzymatic tests. Nearly half of the S. hyodysenteriae strains isolated in Belgium were indole-negative. Such strains have only rarely been reported earlier, and were absent among the strains from other European countries examined. |
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