{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,7,30]],"date-time":"2025-07-30T15:19:05Z","timestamp":1753888745989,"version":"3.41.2"},"reference-count":29,"publisher":"FapUNIFESP (SciELO)","issue":"1","license":[{"start":{"date-parts":[[2022,1,1]],"date-time":"2022-01-01T00:00:00Z","timestamp":1640995200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2022,1,1]],"date-time":"2022-01-01T00:00:00Z","timestamp":1640995200000},"content-version":"am","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2022,1,1]],"date-time":"2022-01-01T00:00:00Z","timestamp":1640995200000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Rev. Bras. Parasitol. Vet."],"abstract":"<jats:p>Abstract During a survey Myxozoa, four specimens of the sheepshead (18 \u00b1 1.5 cm and 59 \u00b1 2.5 g) (Archosargus probatocephalus) were collected in the Ipioquinha river (Macei\u00f3\/AL). Transmission electron microscopy observations revealed erythrocyte agglutinations in gill capillaries located near spherical cysts containing myxospores of the genus Henneguya. This hemagglutination partially or totally obstructed the gill capillaries. Erythrocytes occurred in close adherence to each other, with a closed intercellular space. A few lysed erythrocytes were observed among agglutinated cells. The reduced lumen of the capillaries was partially filled with amorphous dense homogenous material adhering to the erythrocytes. In addition, heterogeneous masses of irregular lower electron density were observed in the reduced channel of the capillary. The agglutinated erythrocytes appeared dense and homogenous, lacking cytoplasmic organelles. The nuclei had the appearance of normal condensed chromatin masses, generally without visible nucleoli. This occurrence of hemagglutination only in the capillaries located in close proximity to the developing myxozoan cysts suggests that parasite development may be a factor triggering erythrocyte agglutination. This is supported by previous experimental studies that showed a probable correlation between parasitic infections and hemagglutination. Nonetheless, further studies are necessary in order to better understand the physicochemical processes involved in this phenomenon.<\/jats:p>","DOI":"10.1590\/s1984-29612022001","type":"journal-article","created":{"date-parts":[[2022,1,14]],"date-time":"2022-01-14T19:39:07Z","timestamp":1642189147000},"source":"Crossref","is-referenced-by-count":0,"title":["Hemagglutination in gill capillaries of sheepshead, Archosargus probatocephalus (Perciformes: Sparidae), infected by a myxosporidean"],"prefix":"10.1590","volume":"31","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0424-1488","authenticated-orcid":false,"given":"Carlos","family":"Azevedo","sequence":"first","affiliation":[{"name":"Universidade do Porto,  Portugal; University of Porto,  Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9680-661X","authenticated-orcid":false,"given":"Gra\u00e7a","family":"Casal","sequence":"additional","affiliation":[{"name":"Universidade do Porto,  Portugal; University Institute of Health Sciences, Cooperativa de Ensino Superior Polit\u00e9cnico e Universit\u00e1rio,  Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5337-5736","authenticated-orcid":false,"given":"Emerson Carlos","family":"Soares","sequence":"additional","affiliation":[{"name":"Universidade Federal de Alagoas,  Brasil"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8482-5047","authenticated-orcid":false,"given":"Elsa","family":"Oliveira","sequence":"additional","affiliation":[{"name":"Universidade do Porto,  Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6230-6142","authenticated-orcid":false,"given":"S\u00f3nia","family":"Rocha","sequence":"additional","affiliation":[{"name":"Universidade do Porto,  Portugal; Universidade do Porto,  Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2029-1242","authenticated-orcid":false,"given":"Mike","family":"Hine","sequence":"additional","affiliation":[{"name":"Currently retired,  France"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7443-1063","authenticated-orcid":false,"given":"Themis Jesus","family":"Silva","sequence":"additional","affiliation":[{"name":"Universidade Federal de Alagoas,  Brasil"}]}],"member":"530","published-online":{"date-parts":[[2022]]},"reference":[{"issue":"3","key":"ref1","doi-asserted-by":"crossref","first-page":"869","DOI":"10.1007\/s10499-019-00501-3","article-title":"The influence of the endogenous and exogenous factors on hematological parameters in different fish species: a review","volume":"28","author":"Ahmed I","year":"2020","journal-title":"Aquacult Int"},{"issue":"4","key":"ref2","doi-asserted-by":"crossref","first-page":"865","DOI":"10.1111\/jfb.12261","article-title":"Ultrastructure of novel thrombocytes in the dog snapper Lutjanus jocu.","volume":"84","author":"Azevedo C","year":"2014","journal-title":"J Fish Biol"},{"issue":"6","key":"ref3","doi-asserted-by":"crossref","first-page":"1719","DOI":"10.1007\/s00436-019-06324-8","article-title":"Description of a new myxozoan Kudoa eugerres n. sp. and reclassification of two Sphaerospora sensu lato species","volume":"118","author":"Casal G","year":"2019","journal-title":"Parasitol Res"},{"issue":"3","key":"ref4","first-page":"267","article-title":"Effect of Dactylogyrus catlaius (Jain 1961) infection in Labeo rohita (Hamilton 1822): innate immune responses and expression profile of some immune related genes","volume":"52","author":"Dash P","year":"2014","journal-title":"Indian J Exp Biol"},{"issue":"2","key":"ref5","doi-asserted-by":"crossref","first-page":"95","DOI":"10.1007\/s11230-012-9374-7","article-title":"A checklist of new species of Henneguya Th\u00e9lohan, 1892 (Myxozoa: Myxosporea, Myxobolidae) described between 2002 and 2012","volume":"83","author":"Eiras JC","year":"2012","journal-title":"Syst Parasitol"},{"issue":"4","key":"ref6","doi-asserted-by":"crossref","first-page":"407","DOI":"10.1679\/aohc.52.407","article-title":"Erythropoiesis and thrombopoiesis in the head-kidney of the Sea Bass (Dicentrarchus labrax L.): an ultrastructural study","volume":"52","author":"Esteban MA","year":"1989","journal-title":"Arch Histol Cytol"},{"issue":"1","key":"ref7","doi-asserted-by":"crossref","first-page":"271","DOI":"10.1093\/icb\/26.1.271","article-title":"Effects of environmental stressors and immunosuppressants on immunity in Fundulus heteroclitus.","volume":"26","author":"Fries CR","year":"1986","journal-title":"Am Zool"},{"issue":"5","key":"ref8","first-page":"192","article-title":"Abiotic factors and mixed bacterial infections caused mortality in cage reared Lena sturgeon (Acipenser baeri)","volume":"35","author":"Galeotti M","year":"2015","journal-title":"Bull Eur Assoc Fish Pathol"},{"issue":"5","key":"ref9","doi-asserted-by":"crossref","first-page":"300","DOI":"10.1016\/j.blre.2017.04.001","article-title":"Autophagy: A necessary event during erythropoiesis","volume":"31","author":"Grosso R","year":"2017","journal-title":"Blood Rev"},{"issue":"2","key":"ref10","doi-asserted-by":"crossref","first-page":"68","DOI":"10.3923\/rjet.2014.68.76","article-title":"Sodium fluoride toxicity in the fresh water cat fish Clarias batrachus (Linn.): effects on the erythrocyte morphology and antioxidant enzymes","volume":"8","author":"Gupta S","year":"2014","journal-title":"Res J Environ Toxicol"},{"year":"2020","series-title":"Guidelines for preparation, storage, handling and use of Tricaine Methanesulfonate (Tricaine-S, MS-222).","key":"ref11"},{"issue":"12","key":"ref12","doi-asserted-by":"crossref","first-page":"2068","DOI":"10.5897\/AJB07.706","article-title":"Sublethal haematological effects of zinc on the freshwater fish, Heteroclarias sp. 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