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Transmission Of Ranavirus Between Ectothermic Vertebrate Hosts, R Brenes, Matt J. Gray, T B. Waltzek, Rebecca P. Wilkes, Debra L. Miller
Transmission Of Ranavirus Between Ectothermic Vertebrate Hosts, R Brenes, Matt J. Gray, T B. Waltzek, Rebecca P. Wilkes, Debra L. Miller
Debra L Miller
Transmission is an essential process that contributes to the survival of pathogens. Ranaviruses are known to infect different classes of lower vertebrates including amphibians, fishes and reptiles. Differences in the likelihood of infection among ectothermic vertebrate hosts could explain the successful yearlong persistence of ranaviruses in aquatic environments. The goal of this study was to determine if transmission of a Frog Virus 3 (FV3)-like ranavirus was possible among three species from different ectothermic vertebrate classes: Cope's gray treefrog (Hyla chrysoscelis) larvae, mosquito fish (Gambusia affinis), and red-eared slider (Trachemys scripta elegans). We housed individuals previously exposed to the FV3-like ranavirus …
Characterization Of A Piscirickettsiosis-Like Disease In Hawaiian Tilapia., M. J. Mauel, Debra L. Miller, K. Frazier, A. Liggett, E. Styer, D. Montgomery-Brock, J. Brock
Characterization Of A Piscirickettsiosis-Like Disease In Hawaiian Tilapia., M. J. Mauel, Debra L. Miller, K. Frazier, A. Liggett, E. Styer, D. Montgomery-Brock, J. Brock
Debra L Miller
In 1994, tilapia (Oreochromis mossambicus and Sarotherodon melanotheron) in wild and farmed populations on Oahu, Hawaii, USA, began to die of an unknown disease that was similar but not identical to piscirickettsiosis in salmonids. Only tilapia were affected. Diseased tilapia often swam erratically and had trouble staying at depth. Scattered cutaneous haemorrhage and exophthalmia were often noted. In many cases, fish were found dead with no clinical signs. Gills exhibited epithelial hyperplasia with severe multifocal consolidation of secondary lamellae. Multiple granulomas were observed in the gills, spleen, kidney, choroid gland and testes, but not in the liver. Tilapia mortalities occurred …