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To date, its presence in Italy has not been documented. This study aimed to investigate the occurrence of\n                      <jats:italic>H. martis<\/jats:italic>\n                      in martens from northern and central Italy using an integrated pathological and molecular approach.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>\n                      Between 2023 and 2025, carcasses of 17 martens (\n                      <jats:italic>Martes<\/jats:italic>\n                      spp.) collected within wildlife health surveillance programs were examined. Tissue samples were screened for apicomplexan DNA by qPCR, and conventional PCR targeting the 18S rDNA, followed by sequencing and phylogenetic analyses, were applied for species characterization. Histopathological examinations were performed on tissues from freshly deceased animals.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      Eight of 17 martens (47%), 16 identified as\n                      <jats:italic>Martes foina<\/jats:italic>\n                      and one\n                      <jats:italic>Martes martes<\/jats:italic>\n                      , tested positive for\n                      <jats:italic>Hepatozoon<\/jats:italic>\n                      infection. Sequencing confirmed\n                      <jats:italic>H. martis<\/jats:italic>\n                      in multiple tissues, including spleen, heart, lymph nodes, and muscle. Histopathological analysis revealed multifocal granulomatous myocarditis and myositis, with intracellular zoites and type II meronts observed within inflammatory lesions. Phylogenetic analyses of short and long 18S rDNA fragments showed that Italian isolates clustered with\n                      <jats:italic>H. martis<\/jats:italic>\n                      sequences from other European countries, displaying low genetic variability.\n                      <jats:italic>Hepatozoon<\/jats:italic>\n                      DNA was also detected in one\n                      <jats:italic>Ixodes<\/jats:italic>\n                      sp. collected from an infected animal.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>\n                      This study provides the first evidence to our knowledge of\n                      <jats:italic>H. martis<\/jats:italic>\n                      infection in Italy and highlights its pathogenic potential in stone martens. The low genetic diversity observed among European isolates suggests widespread circulation and gene flow across regions. Further investigations are required to elucidate transmission pathways, identify competent vectors, and assess the pathological significance of\n                      <jats:italic>H. martis<\/jats:italic>\n                      in wildlife.\n                    <\/jats:p>\n                  <\/jats:sec>","DOI":"10.1186\/s13071-026-07384-3","type":"journal-article","created":{"date-parts":[[2026,4,8]],"date-time":"2026-04-08T11:57:14Z","timestamp":1775649434000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Hepatozoon martis in Italy: first evidence based on histopathological characterization and molecular confirmation in Martes foina"],"prefix":"10.1186","volume":"19","author":[{"given":"Filippo Maria","family":"Dini","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alicia","family":"Rojas","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Luisa Vera","family":"Muscatello","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Roberta","family":"Galuppi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Debora","family":"Torri","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mara","family":"Scremin","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Patrizia","family":"Bassi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Giulia","family":"Maioli","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2026,4,8]]},"reference":[{"key":"7384_CR1","doi-asserted-by":"publisher","DOI":"10.1186\/s13071-022-05626-8","volume":"16","author":"M Uiterwijk","year":"2023","unstructured":"Uiterwijk M, Vojta L, \u0160prem N, Beck A, Jurkovi\u0107 D, Kik M, et al. 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No live animals were handled, and no experimental procedures were performed; therefore, ethical approval and consent to participate were not required.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethic approval and consent to participate"}},{"value":"Not applicable.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent for publication"}},{"value":"Seth Redmond is an Associate Editor for Parasites & Vectors and was not involved in the peer review of this paper. The authors declare that they have no other competing interests.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing interests"}}],"article-number":"237"}}