Bacterial Fish Pathogens: Diseases of Farmed and Wild Fish by Professor B. Austin, Dr D. A. Austin (auth.)

By Professor B. Austin, Dr D. A. Austin (auth.)

This completey revised and up-to-date variation of Bacterial Fish Pathogens is a finished dialogue of the organic points of the bacterial taxa which reason illness in fish. because the third version was once released in 1999, a lot has replaced within the regulate of sickness of farmes and wild fish. New pathogens similar to Pasteurella skyensis were defined, and antimicrobial compounds for the keep watch over of affliction were changed via replacement equipment, corresponding to probiotics. attention is given to the entire bacterial taxa that have at it slow been said as fish pathogens, whether or not they are secondary invaders of already broken tissues or critical, fundamental pathogens.

Bacterial Fish Pathogens

*provides up to date details on all of the bacterial fish pathogens
*covers all facets of the biology of the bacterial fish pathogens
*details finished diagnostic and identity schemes
*covers new advancements on common illnesses, akin to furunculosis and vibriosis
*considers substitute tools of affliction regulate, resembling using probiotics

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Additional resources for Bacterial Fish Pathogens: Diseases of Farmed and Wild Fish

Example text

Flavobacterium psychrophilum Although this organism is mostly associated with infections in salmonids, other fish species have been infected, for example sea lamprey (Elsayed et aL, 2006), and ayu has been challenged successfully by immersion (Miwa and Nakayasu, 2005). Mostly, this organism causes skin lesions, which are often described as saddle-Hke lesions, containing myriads of organisms, near the dorsal fin. The fish may darken and, in advanced cases, develop bacteraemia with the pathogen ramifying throughout the animal (Wood and Yasutake, 1956; Winton et aL, 1983; Lehmann et aL, 1991).

Disease signs, which were more severe during summer, included weight loss, haemorrhaging on the anal and pectoral fins, petechial haemorrhages on the abdomen, bilateral exophthalmia, haemorrhaging and pus in the eyes, pale liver, congested kidney and spleen, ascites, and mucohaemorrhagic enteritis (Domenech et ai, 1996). , where it occurred in hatchery-reared brown trout (Salmo trutta), rainbow trout (Oncorhynchus mykiss) and brook trout (Salvelinus fontinalis) (Belding and Merrill, 1935). Additional evidence indicated the presence of BKD in chinook salmon {Oncorhynchus tshawytscha), coho salmon (O.

Austin, unpublished observation), lake herring or cisco (Coregonus artedii; Bullock and Anderson, 1984) and minnows (Pimephales promelas) (Michel et ai, 1986a). Also, sea bass and turbot appear to be susceptible (Vigneulle, 1990). In the case of rainbow trout, there is experimental evidence that significantly lower mortalities occur with increases of salinity. 5% in freshwater to 75% in 9%o salinity (Altinok and Grizzle, 2001a). Much excellent work has certainly been accomplished, but there are many basic facets of the biology of the pathogen which remain unknown or unclear.

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