COCCIDIOSIS IN GREEN TURTLES ( CHELONIA MYDAS ) IN AUSTRALIA: PATHOGENESIS, SPATIAL AND TEMPORAL DISTRIBUTION, AND CLIMATE-RELATED DETERMINANTS OF DISEASE OUTBREAKS.

Autor: de Gouvea Pedroso SB; Sydney School of Veterinary Science, The University of Sydney, 415 Werombi Road, Camden, New South Wales, 2570, Australia.; Australian Registry of Wildlife Health, Taronga Conservation Society Australia, Mosman, 2088, New South Wales, Australia., Phalen DN; Sydney School of Veterinary Science, The University of Sydney, 415 Werombi Road, Camden, New South Wales, 2570, Australia., Terkildsen M; Australian Bureau of Meteorology, 300 Elizabeth Street, Sydney, New South Wales, 2000, Australia., Blyde D; Village Roadshow Theme Parks, Sea World, Seaworld Drive, Main Beach, Gold Coast, 4217, Queensland, Australia., March DT; Dolphin Marine Magic, 65 Orlando Street, Coffs Harbour, 2450, New South Wales, Australia., Gordon AN; Biosecurity Sciences Laboratory, Queensland Department of Agriculture and Fisheries, 39 Kessels Road, Cooper Plains, 4108, Queensland, Australia., Chapman PA; School of Veterinary Science, The University of Queensland, Gatton, 4343, Queensland, Australia., Mills PC; School of Veterinary Science, The University of Queensland, Gatton, 4343, Queensland, Australia., Owen H; School of Veterinary Science, The University of Queensland, Gatton, 4343, Queensland, Australia., Gillett A; Australia Zoo Wildlife Hospital, 1638 Steve Irwin Way, Beerwah, 4519, Queensland, Australia., Lloyd HB; Office of the Environment and Heritage, NSW National Parks and Wildlife Service, PO Box 1967, Hurstville, 1481, New South Wales, Australia., Ross GA; Office of the Environment and Heritage, NSW National Parks and Wildlife Service, PO Box 1967, Hurstville, 1481, New South Wales, Australia., Hall J; Australian Registry of Wildlife Health, Taronga Conservation Society Australia, Mosman, 2088, New South Wales, Australia., Scott J; College of Public Health, Medical and Veterinary Sciences, James Cook University, 1 James Cook Drive, Townsville, 4811, Queensland, Australia., Ariel E; College of Public Health, Medical and Veterinary Sciences, James Cook University, 1 James Cook Drive, Townsville, 4811, Queensland, Australia., Yang R; School of Veterinary and Life Sciences, Murdoch University, 90 South Street, Murdoch, 6150, Western Australia, Australia., Rose KA; Australian Registry of Wildlife Health, Taronga Conservation Society Australia, Mosman, 2088, New South Wales, Australia.; College of Public Health, Medical and Veterinary Sciences, James Cook University, 1 James Cook Drive, Townsville, 4811, Queensland, Australia.
Jazyk: angličtina
Zdroj: Journal of wildlife diseases [J Wildl Dis] 2020 Apr; Vol. 56 (2), pp. 359-371. Date of Electronic Publication: 2019 Oct 28.
Abstrakt: An epizootic of coccidiosis in free-ranging green turtles ( Chelonia mydas ) occurred in Australia in 1991 and the parasites were thought to be Caryospora cheloniae . Recurring outbreaks over an increased geographic range followed. We used medical records and temporal and spatial data of turtles diagnosed with coccidiosis between 1991 and 2014 to characterize the disease and factors associated with outbreaks. Most affected animals were subadults or older. Neurologic signs with intralesional cerebral coccidia were observed. Coccidia associated with inflammation and necrosis were predominantly found in the intestine, brain, kidney, and thyroid. Cases occurred in the spring and summer. Three major outbreaks (1991, 2002, and 2014) were concentrated in Port Stephens, New South Wales (NSW) and Moreton Bay, Queensland, but cases occurred as far south as Sydney, NSW. Coccidiosis cases were more likely during, or 1 mo prior to, El Niño-like events. Molecular characterization of the 18S rRNA locus of coccidia from tissues of 10 green turtles collected in 2002 and 2004 in Port Stevens and Sydney imply that they were Schellackia -like organisms. Two genotypes were identified. The Genotype 3 sequence was most common (in eight of 10 turtles), with 98.8% similarity to the 18S sequence of Schellackia orientalis . The Genotype 4 sequence was less common (in two of 10 turtles) with 99.7% similarity to the 18S sequence of the most common genotype (Genotype 1) detected in turtles from the 2014 Moreton Bay outbreak. Our study will help with the identification and management of future outbreaks and provide tools for identification of additional disease patterns in green turtles.
Databáze: MEDLINE