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By B. Austin

This 4th, revised version of Bacterial Fish Pathogens fills the necessity for an up to date accomplished booklet at the organic features of the bacterial taxa which reason affliction in fish. because the third version used to be released in 1999, a lot has replaced within the keep an eye on of disorder of farmed and wild fish. Many extra medical articles approximately bacterial fish pathogens were released, describing such new pathogens as Pasteurella skyensis, and antimicrobial compounds for the keep watch over of illness were changed via substitute tools, equivalent to using probiotics. This up to date publication analyses the entire new info, together with that on new pathogens and new advancements on lengthy proven ailments, equivalent to furunculosis and vibriosis. attention is given to all the bacterial taxa that have at a while been pronounced as fish pathogens, whether or not they are secondary invaders of already broken tissue or severe, basic pathogens.

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Extra info for Bacterial Fish Pathogens: Disease of Farmed and Wild Fish (Springer Praxis Books / Environmental Sciences)

Sample text

However, petechial haemorrhages in the muscle and hyperaemic air bladder were observed in some fish. The heart and gills appeared normal. According to Hiu et al. (1984), the disease occurred in fish >1 year old, which may have undergone stress, namely handling and spawning. Disease symptoms were varied, including septicaemia, the abdomen distended with ascitic fluid, muscle abscesses, blood blisters just beneath the skin and internal haemorrhaging. Enterococcaceae representatives Enterococcus (Streptococcus) faecalis subsp.

Secondary invasion of the ulcer by fungi or other bacteria is common. If the fish recovers, the healed ulcer is recognisable as a grey-black scar. Frequently, contraction of the collagen of the scar tissue can result in serious deformity, which reduces the commercial value of the fish (Fijan, 1972). In some instances, CE may also result in generalised septicaemia and death. Unlike furunculosis, which usually occurs only when water temperatures exceed 16°C, CE may occur at all water temperatures.

Enteric redmouth (ERM), is fairly descriptive insofar as one of the most common symptoms is reddening of the mouth and throat, which is caused by subcutaneous haemorrhaging (Busch, 1973). Other external signs include inflammation and erosion of the jaws and palate, melanosis, haemorrhaging around the base of the fins, bilateral exophthalmia and a tendency for sluggishness (Fuhrmann et ai, 1983; BuUock and Anderson, 1984; Danley et ai, 1999). In channel catfish, the disease was characterised by swollen haemorrhaged rings around the eyes and raised haemorrhaged areas overlying the frontal foramens (Danley et ai, 1999).

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