{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2023,11,2]],"date-time":"2023-11-02T01:11:10Z","timestamp":1698887470947},"reference-count":49,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2007,4,30]],"date-time":"2007-04-30T00:00:00Z","timestamp":1177891200000},"content-version":"vor","delay-in-days":12506,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["The Journal of Protozoology"],"published-print":{"date-parts":[[1973,2]]},"abstract":"<jats:title>SYNOPSIS<\/jats:title><jats:p>The fine structure of gametocytes of 3 avian haemosporidian parasites <jats:italic>Plasmodium gallinaceum, Haemoproteus columbae<\/jats:italic>, and <jats:italic>Leucocytozoon simondi<\/jats:italic> has been studied and compared by electron microscopy. The gametocytes of all 3 species are bounded by a 3\u2010layered limiting membrane system, possess a cytostome during some portion of their residence within host cells, and their sex can be distinguished by both nuclear and cytoplasmic characteristics. <jats:italic>L. simondi<\/jats:italic> differs most significantly from <jats:italic>P. gallinaceum<\/jats:italic> and <jats:italic>H. columbae<\/jats:italic> in possessing large intranuclear granules, mitochondria associated with pocket infoldings of the nuclear envelope near the atypical centriole complex and compartmentalization of the cytoplasm by segments of closely aligned unit membranes. Further, the cytostome of <jats:italic>L. simondi<\/jats:italic> does not appear to be a persistent structure as in the other 2 species and pigment is not present within food vacuoles. <jats:italic>L. simondi<\/jats:italic> also is capable of infecting a wider variety of host cells and within leukocytes produces striations of the host nucleus and an apparent spiral banding of the host cell surface. The comparison of <jats:italic>P. gallinaceum, H. columbae<\/jats:italic>, and <jats:italic>L. simondi<\/jats:italic> gametocytes by electron microscopy leads to the conclusion that <jats:italic>Plasmodium and Haemoproteus<\/jats:italic> are more closely related to each other than either of them is on <jats:italic>Leucocytozoon.<\/jats:italic><\/jats:p><jats:p>The terminology used to describe certain organelles within the gametocyte's cytoplasm has been reexamined and the relationship of the nucleolus to parasite maturation also is described.<\/jats:p>","DOI":"10.1111\/j.1550-7408.1973.tb06008.x","type":"journal-article","created":{"date-parts":[[2007,5,14]],"date-time":"2007-05-14T00:48:02Z","timestamp":1179103682000},"page":"81-92","source":"Crossref","is-referenced-by-count":31,"title":["A Comparative Study of Gametocyte Ultrastructure in Avian Haemosporidia*"],"prefix":"10.1111","volume":"20","author":[{"given":"CHARLES R.","family":"STERLING","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"MASAMICHI","family":"AIKAWA","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2007,4,30]]},"reference":[{"key":"e_1_2_1_2_2","doi-asserted-by":"publisher","DOI":"10.1016\/0014-4894(71)90094-4"},{"key":"e_1_2_1_3_2","doi-asserted-by":"publisher","DOI":"10.2307\/3277138"},{"key":"e_1_2_1_4_2","doi-asserted-by":"publisher","DOI":"10.2307\/3277923"},{"key":"e_1_2_1_5_2","doi-asserted-by":"publisher","DOI":"10.1083\/jcb.28.2.355"},{"key":"e_1_2_1_6_2","doi-asserted-by":"publisher","DOI":"10.1083\/jcb.34.1.229"},{"key":"e_1_2_1_7_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0022-5320(69)80010-9"},{"key":"e_1_2_1_8_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0022-5320(70)80037-5"},{"key":"e_1_2_1_9_2","article-title":"Cytochemistry of the nucleus of malarial parasites","author":"Aikawa M.","year":"1972","journal-title":"Proc. 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