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The infected host demonstrates a respiratory disease whose etiologic agent is\n                      <jats:italic>Mycoplasma hyopneumoniae<\/jats:italic>\n                      (Mhp)\n                      <jats:italic>.<\/jats:italic>\n                      A total of 266 lung samples with\n                      <jats:italic>Mycoplasma-<\/jats:italic>\n                      like lesions were collected from two slaughterhouses. We analyzed the genetic profile of Mhp field samples using 16 genes that encode proteins involved in the mechanisms of bacterial pathogenesis and\/or the immune responses of the host. Bioinformatic analyses were performed to classify the Mhp field samples based on their similarity according to the presence of the studied genes.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>Our results showed variations in the frequency of the 16 studied genes among different Mhp field samples. It was also noted that samples from the same farm were genetically different from each other and samples from different regions could be genetically similar, which is evidence of the presence of different genetic profiles among the Mhp field strains that circulate in Brazilian swine herds.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>This work demonstrated the genetic diversity of several Mhp field strains based on 16 selected genes related to virulence and\/or immune response in Brazil. Our findings demonstrate the difference between Mhp field strains could influence the virulence, and we hypothesize that the most frequent genes in Mhp field strains could possibly be used as vaccine candidates. Based on our results, we suspect that Mhp genetic variability may be associated with the frequency of genes among the field strains and we have demonstrated that some Mhp field samples could not have many important genes described in the literature.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1186\/s12866-019-1603-7","type":"journal-article","created":{"date-parts":[[2019,10,28]],"date-time":"2019-10-28T11:05:26Z","timestamp":1572260726000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Genetic variation of Mycoplasma hyopneumoniae from Brazilian field samples"],"prefix":"10.1186","volume":"19","author":[{"given":"Viviane Sisdelli","family":"Assao","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Thalita Moreira","family":"Scatamburlo","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Elaine Nery","family":"Araujo","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Marcus Rebou\u00e7as","family":"Santos","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Carlos Eduardo Real","family":"Pereira","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Roberto Maur\u00edcio Carvalho","family":"Guedes","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Gustavo Costa","family":"Bressan","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Juliana Lopes Rangel","family":"Fietto","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yung-Fu","family":"Chang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Maria Aparecida Scatamburlo","family":"Moreira","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0614-7527","authenticated-orcid":false,"given":"Abelardo","family":"Silva-J\u00fanior","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2019,10,28]]},"reference":[{"issue":"3\u20134","key":"1603_CR1","doi-asserted-by":"publisher","first-page":"234","DOI":"10.1016\/j.vetmic.2013.04.019","volume":"165","author":"S Simionatto","year":"2013","unstructured":"Simionatto S, Marchioro SB, Maes D, Dellagostin OA. 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