Lactococcosis in Reared Fish in Brazil and Control Strategies
Journal Title: UNKNOWN - Year 2017, Vol 8, Issue 3
Abstract
Lactococcus garvieae is a Gram positive bacterium responsible for diseases in humans, domestic animals, and fish [1]. This bacterium is an emerging pathogen that could pose a worldwide problem for fish farming, particularly in intensive culture systems [2]. Disease outbreaks caused by L. garvieae have been described in freshwater and marine fish species in America, Europe, Asia and Oceania [3], although L. garvieae has also been isolated from tropical fish such as Nile tilapia Oreochromis niloticus (L.) and spotted sorubim, Pseudoplatystoma corruscans (Spix & Agassiz) in Brazil [4]. The authors are however not aware of any clinical information concerning these cases and, to the best of our knowledge, there are no reports of L. garvieae outbreaks in other cultured tropical fish species in Brazil. High water temperature as well as poor water quality in ponds increases the susceptibility towards L. garvieae infections. Infections are characterised by the development of hyperacute haemorrhagic septicaemia. The major diagnostic clinical symptoms are anorexia, melanosis, lethargy, loss of orientation, erratic swimming, exophthalmia (uni- or bilateral), ascites, rectal prolapse, as well as haemorrhages in the periorbital and intraocular area, the base of fins, the perianal region, the opercula and the buccal region [3,5]. Since 2010, outbreaks of septicaemia and meningoencephalitis have been observed in several commercial farms of barred sorubim, Pseudoplatystoma reticulatum (L.) and hybrid sorubim (P. corruscans x P. reticulatum) in Brazil, being a problem to be solved.
Authors and Affiliations
Fukushima HCS, Bailone RL, Ranzani Paiva MJT
Keywords
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- EP ID EP363324
- DOI 10.4172/2157-7560.1000357
- Views 29
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