{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,12]],"date-time":"2026-05-12T20:52:27Z","timestamp":1778619147275,"version":"3.51.4"},"reference-count":45,"publisher":"Cambridge University Press (CUP)","issue":"10","license":[{"start":{"date-parts":[[2010,6,17]],"date-time":"2010-06-17T00:00:00Z","timestamp":1276732800000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/www.cambridge.org\/core\/terms"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Parasitology"],"published-print":{"date-parts":[[2010,9]]},"abstract":"<jats:title>SUMMARY<\/jats:title><jats:p>Yellow-eyed penguins on Stewart Island were identified with a<jats:italic>Leucocytozoon<\/jats:italic>spp. of a novel lineage in association with a high regional incidence of chick mortality (<jats:italic>n<\/jats:italic>=32, 100% mortality) during the November 2006 to January 2007 breeding season. Fourteen chicks from Stewart Island were examined post-mortem and histologically for<jats:italic>Leucocytozoon<\/jats:italic>infection. In addition, a survey of blood to detect<jats:italic>Leucocytozoon<\/jats:italic>spp. infections using PCR was performed on 107 yellow-eyed penguins from 4 distinct nesting areas on the South Island (Oamaru, Otago Peninsula, and Catlins) (<jats:italic>n<\/jats:italic>=95), and Stewart Island (<jats:italic>n<\/jats:italic>=12). The results of the study revealed that 2 of the 14 (14%) chicks necropsied showed severe, disseminated megaloschizont formation in the liver, spleen, lung, kidney and other tissues characteristic of leucocytozoonosis. Eighty-three percent (83%) of blood samples collected from Stewart Island penguins contained<jats:italic>Leucocytozoon<\/jats:italic>DNA, whereas samples from the 3 other nesting areas were negative for the blood parasite.<jats:italic>Leucocytozoon<\/jats:italic>spp. DNA sequences isolated from blood and tissues of adults (<jats:italic>n<\/jats:italic>=10) and chicks (<jats:italic>n<\/jats:italic>=7) were similar and grouped with other published<jats:italic>Leucocytozoon<\/jats:italic>spp. sequences but in a distinct cluster together with closely related isolates from a Western march harrier (<jats:italic>Circus aerginosus<\/jats:italic>) and common loon (<jats:italic>Gavia immer<\/jats:italic>). These findings suggest that yellow-eyed penguins on Stewart Island are infected with a regionally isolated, host-specific<jats:italic>Leucocytozoon<\/jats:italic>spp. which may contribute to the high chick mortality observed during this period.<\/jats:p>","DOI":"10.1017\/s0031182009991910","type":"journal-article","created":{"date-parts":[[2010,6,17]],"date-time":"2010-06-17T15:24:00Z","timestamp":1276788240000},"page":"1477-1485","source":"Crossref","is-referenced-by-count":24,"title":["Prevalence of<i>Leucocytozoon<\/i>spp, in the endangered yellow-eyed penguin<i>Megadyptes antipodes<\/i>"],"prefix":"10.1017","volume":"137","author":[{"given":"A. G.","family":"HILL","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"L.","family":"HOWE","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"B. 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