A bootstrap analysis for 1,000 replicates was undertaken using FreeTree at http://web.natur.cuni.cz/flegr/programs/freetree.htm. Then, the second vaccine (revaccination) may take place at the age of eight weeks. 5. The composition according to items 1 and/or 2, wherein the bacteria are present in a concentration of between 104. The composition according to one or more of items 15 to 18, wherein the total number of bacteria per dose administrated to swine is between 1020. The composition according to items 1 and/or 2, wherein the bacteria are present in a concentration of between 104. 5,750,118: The invention relates to a vaccine against SD comprising an effective quantity of inactivated and adjuvant-containing U.S. Pat. Weaning can occur at 21 days of age (La, T. et al, Veterinary Microbiology (2004), 102:97- 109). 16. 4,748,019: The authors found that an effective regime of vaccination comprises administering parenterally to pigs a priming dose of killed virulent or pathogenic T. hyodysenteriae effective to stimulate the immune response of the pig (strain “P18A”, NCTC 11615) to a subsequent dose of a live avirulent or non-pathogenic strain of U.S. Pat. A composition according to one or more of the preceding items for use as a vaccine. A bacteria strain selected from strains deposited at the Collection Nationale de Cultures de Microorganismes (CNCM), Institut Pasteur with registration numbers CNCM I- 4720, CNCM 1-4721 and CNCM 1-4722. The objective of the study was to compare the effectiveness of a universal vaccine (in this case composed by three selected strains, none of which was the strain causing the infection) with that of an autovaccine in very stringent conditions. For example, the composition may comprise antiseptic and/or antifungal agents. The composition according to one or more of the preceding claims, wherein at least one of the strains belong to clonal complex I, at least one of the strains belong to clonal

The composition according to item 1, wherein the bacteria are inactivated.3. The bacteria of the composition can be inactivated by any inactivation procedure known in the art. No statistically significant differences were found between both groups of vaccinated and autovaccinated pigs (F=1.7; p=0.228) (The proportion of days with diarrhoea was significantly higher in the control group as compared with vaccinated pigs with the universal vaccine (ChiA similar result regarding the proportion of days with bloody diarrhea was obtained. 18. The freely available program Peak Scanner Software v 1.0 (Applied Biosystems) was used to size the PCR fragments for each locus.The number of repeats was calculated according to the following formula:The results were approximated to the nearest lower integer and sequentially scored (Bhyo_6, Bhyo_7, Bhyo_12, Bhyo_17, Bhyo_21, Bhyo_22, Bhyo_10, and Bhyo_23) to create a numerical profile that defined each strain. The composition according to one or more of the preceding items, wherein at least one strain belongs to clonal complex II, and/or wherein at least one strain belongs to clonal complex V, and/or wherein at least one strain belongs to clonal complex I. The method according to one or more of items 28 to 30 wherein the genetic diversity is conferred by selecting each strain from different clonal complexes. The method according to one or more of items 29 to 31, wherein the epidemiologic relevance is conferred by selecting strains that are detected in a proportion of at least 1% with respect to the total of detected strains in a region of interest.33. No statistically significant differences were found between vaccinated with the universal vaccine and autovaccinated pigs in the proportion of days with diarrhoea (ChiIn the first 9 days after challenge, almost no weight gain was observed in pigs from the vaccinated with the universal vaccine group and a mean daily gain of 0.27 kg was determined in animals from the autovaccinated group.