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Outbreaks of an iridovirus disease in cultured tiger frog, Rana tigrina rugulosa , in southern China

Outbreaks of an iridovirus disease in cultured tiger frog, Rana tigrina rugulosa , in southern China Tiger frog, Rana tigrina rugulosa, is an economically important species cultured in southern China. Recently, outbreaks of a disease called `abdominal distension disease' have resulted in significant economic losses in tiger frog cultured in Guangdong and Hainan Provinces, China. High mortality of cultured tiger frog tadpoles was recorded in many farms in Guangdong Province from May to June 2000. During the epizootic period, water temperature was in the range 20–27 °C. The estimated mortality in the farms was about 95% of the cultured tadpoles. The affected tadpoles in the culture ponds showed abdominal distension, ataxia and reduced feeding activity. No skin ulcers were observed in the affected tadpoles. The most prominent features of affected moribund tadpoles were enlargement of the kidney, spleen and liver with petechial haemorrhages at necropsy. Similar signs were also observed in affected juvenile and adult frogs and also in frogs that were experimentally infected. The average mortality caused by `abdominal distension disease' was about 30% in all juvenile and adult frogs from 1998 to 2000 in Guangdong and Hainan Provinces. In this study, four tiger frog tadpoles (total weight 2.1 g) with typical signs of `abdominal distension disease' from a farm in Guangdong Province http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Fish Diseases Wiley

Outbreaks of an iridovirus disease in cultured tiger frog, Rana tigrina rugulosa , in southern China

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References (29)

Publisher
Wiley
Copyright
Copyright © 2002 Wiley Subscription Services, Inc., A Wiley Company
ISSN
0140-7775
eISSN
1365-2761
DOI
10.1046/j.1365-2761.2002.00386.x
Publisher site
See Article on Publisher Site

Abstract

Tiger frog, Rana tigrina rugulosa, is an economically important species cultured in southern China. Recently, outbreaks of a disease called `abdominal distension disease' have resulted in significant economic losses in tiger frog cultured in Guangdong and Hainan Provinces, China. High mortality of cultured tiger frog tadpoles was recorded in many farms in Guangdong Province from May to June 2000. During the epizootic period, water temperature was in the range 20–27 °C. The estimated mortality in the farms was about 95% of the cultured tadpoles. The affected tadpoles in the culture ponds showed abdominal distension, ataxia and reduced feeding activity. No skin ulcers were observed in the affected tadpoles. The most prominent features of affected moribund tadpoles were enlargement of the kidney, spleen and liver with petechial haemorrhages at necropsy. Similar signs were also observed in affected juvenile and adult frogs and also in frogs that were experimentally infected. The average mortality caused by `abdominal distension disease' was about 30% in all juvenile and adult frogs from 1998 to 2000 in Guangdong and Hainan Provinces. In this study, four tiger frog tadpoles (total weight 2.1 g) with typical signs of `abdominal distension disease' from a farm in Guangdong Province

Journal

Journal of Fish DiseasesWiley

Published: Jul 1, 2002

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