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Zool."],"published-print":{"date-parts":[[2026,9]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>\n                    The patterns of exo\u2010erythrocytic development remain poorly understood for most described\n                    <jats:italic>Haemoproteus<\/jats:italic>\n                    parasites. Three modes of exo\u2010erythrocytic development have been recognized so far:\n                    <jats:italic>Haemoproteus<\/jats:italic>\n                    species that develop only meronts, only megalomeronts, and both morphotypes. The factors underlying the occurrence of these different tissue stages in certain\n                    <jats:italic>Haemoproteus<\/jats:italic>\n                    lineages remain unclear, emphasizing the need for further research on these parasites, which can cause severe disease in non\u2010adapted avian hosts. We investigated, for the first time, the tissue merogony of\n                    <jats:italic>Haemoproteus belopolskyi<\/jats:italic>\n                    in the type\u2010vertebrate host, the Icterine Warbler,\n                    <jats:italic>Hippolais icterina<\/jats:italic>\n                    (Acrocephalidae). Twenty\u2010two naturally infected birds were examined using an integrative approach that included microscopy, nested PCR, traditional histology, chromogenic in situ hybridization, and laser capture microdissection. Phylogenetic analysis of the parasite's partial cytochrome b gene showed a close relationship among the detected\n                    <jats:italic>Haemoproteus<\/jats:italic>\n                    lineages. Megalomeronts of\n                    <jats:italic>H. belopolskyi<\/jats:italic>\n                    were found in the kidneys and heart of eight individuals. In addition to big megalomeronts, small immature meront\u2010like structures were seen in the renal tubules. Molecular analyses and systematic comparison of these structures showed that they represent young (initial) stages of megalomeront development. Laser capture microdissection demonstrated that both the immature and advanced megalomeronts belonged to the\n                    <jats:italic>H. belopolskyi<\/jats:italic>\n                    lineage hHIICT1, indicating that\n                    <jats:italic>H. belopolskyi<\/jats:italic>\n                    produces only megalomeronts and highlighting the importance of integrative analyses to identify tissue stages of different sizes and morphologies.\n                  <\/jats:p>","DOI":"10.1111\/1749-4877.70126","type":"journal-article","created":{"date-parts":[[2026,5,22]],"date-time":"2026-05-22T12:51:03Z","timestamp":1779454263000},"page":"1190-1205","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Exo\u2010Erythrocytic Development of\n                    <i>Haemoproteus belopolskyi<\/i>\n                    (Haemosporida, Haemoproteidae) in the Type\u2010Vertebrate Host\n                    <i>Hippolais icterina<\/i>\n                    , With Remarks on Phenotypic Variation in Avian Haemoproteids"],"prefix":"10.1111","volume":"21","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6559-778X","authenticated-orcid":false,"given":"M\u00e9lanie","family":"Tchoumbou","sequence":"first","affiliation":[{"name":"State Scientific Research Institute Nature Research Centre  Vilnius Lithuania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tanja","family":"Himmel","sequence":"additional","affiliation":[{"name":"Institute of Pathology, Department of Biological Sciences and Pathobiology University of Veterinary Medicine Vienna Vienna Austria"},{"name":"Department of Pathology Medical University of Vienna  Vienna Austria"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Josef","family":"Harl","sequence":"additional","affiliation":[{"name":"Institute of Pathology, Department of Biological Sciences and Pathobiology University of Veterinary Medicine Vienna Vienna Austria"},{"name":"Department of Pathology Medical University of Vienna  Vienna Austria"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tatjana","family":"Iezhova","sequence":"additional","affiliation":[{"name":"State Scientific Research Institute Nature Research Centre  Vilnius Lithuania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Vytautas","family":"Eigirdas","sequence":"additional","affiliation":[{"name":"Ventes Ragas Ornithological Station  Vente Lithuania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Herbert","family":"Weissenb\u00f6ck","sequence":"additional","affiliation":[{"name":"Institute of Pathology, Department of Biological Sciences and Pathobiology University of Veterinary Medicine Vienna Vienna Austria"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gediminas","family":"Valki\u016bnas","sequence":"additional","affiliation":[{"name":"State Scientific Research Institute Nature Research Centre  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