Abstract
Sturgeon aquaculture production has increased worldwide, particularly in Italy, yet there is little information about diseases that affect sturgeons. With this study we describe the results of screening for bacterial infections during monitoring campaigns carried out from 2014 to 2017. A total of 402 sturgeons from six sturgeon farms with one or more reared sturgeon species among five species and two hybrids were analysed. Bacteriological exam was positive in 93 individuals (23%) and negative in the remaining 309 (77%). Generally, no external or internal macroscopic lesions were present, though some specimens showed skin lesions, liver anaemia or splenomegaly, which are non-pathognomonic signs of bacterial infection. The majority of the isolated bacteria were opportunistic. This knowledge base is important to help create a bacterial profile of sturgeons reared in Italy.
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