标题：Molecular evidence for a bacterium of the family Midichloriaceae (order Rickettsiales) in skin and organs of the rainbow trout Oncorhynchus mykiss affected by red mark syndrome
期刊名称：International Journal of Health, Animal Science and Food Safety
印刷版ISSN：2283-3927
出版年度：2015
卷号：2
期号：1s
DOI：10.13130/2283-3927/4979
语种：English
出版社：Department of Health, Animal Science and Food Safety (VESPA)
摘要：Red mark syndrome (RMS) is a chronic skin disease of unknown aetiology affecting farmed rainbow trout Oncorhynchus mykiss in Europe that causes single or multiple bright red skin lesions. Histological analysis showed acute inflammation in the area of the skin suggesting a bacterial infection. No aetiological agent has been unequivocally identified, although the involvement of a single transmissible agent has been suggested. The 16S rDNA of a bacterium belonging to the family Midichloriaceae (Rickettsiales) was found in association with RMS skin lesions. In this work, we present a novel specific method for absolute quantification of the midichloriacea associated with RMS in O. mykiss , based on a quantitative PCR approach. The qPCR method was tested on healthy skin, on lesions when present and on organ samples (heart, liver, spleen, intestine, kidney) from ten fish. Our work shows, for the first time, that the midichloriacea is present not only in skin lesions but also in organs of affected fish. Further studies are needed to prove whether this bacterium is actually involved in the pathology.
关键词：red mark syndrome;midichloriaceae;real time pcr;oncorhynchus mykiss
