Haemorrhaging on the surface and in the muscle This is a common condition with

Haemorrhaging on the surface and in the muscle this

This preview shows page 214 - 216 out of 594 pages.

Haemorrhaging on the surface and in the muscle This is a common condition with infections by Aer. caviae, Aer. bestiarum (Figure 6.12 [see colour section]), Aer. hydrophila (Figure 6.13 [see colour section]), Aer. salmonicida, Arc. cryaerophilus, Car. piscicola, Chrys. scophthalmum, Cit. freundii, Esch. vulneris, Edw. ictaluri, Edw. tarda (Figure 6.14 [see colour section]), Pantoea agglomerans, Fla. columnare, Haf. alvei, Lactobacillus spp., Lactococcus piscium, Moraxella sp., Mycobacterium spp., Nocardia spp.. Ph. damselae subsp. piscicida, Ps. anguilliseptica (Figure 6.15 [see colour section]), Ps. chlororaphis, Ps. fluorescens, Ren. salmoninarum (Figure 6.16 [see colour section]), Shewanella putrefaciens, Str. parauberis, Vag. salmoninarum. Vibrio sp. (Figure 6.17 [see colour section]), V. anguillarum (Figure 6.18 [see colour section]), V. cholerae, V. salmonicida, V. vulniflcus and Y. intermedia. Necrotising dermatitis This condition has been associated with infection by Bacillus spp. and unknown causes. Ulcers The presence of ulcers (or surface erosion) on fish occurs with infections caused by Acinetobacter sp., Aer. salmonicida (Figures 6.19-6.22 [see colour section]), Aer. veronii biovar sobria, Bac. mycoides, Cit. freundii. En. faecalis subsp. liquefaciens, Moritella marina, Moritella viscosa, Mycobacterium spp., Nocardia spp.. Ph. dam- selae, Pr. rettgeri, Ren. salmoninarum, Sta. epidermidis, Sta. warneri, Str. milleri. Vibrio sp. (Figure 6.23 [see colour section]), V. alginolyticus, V. flscheri, V. harveyi, V. logei, V. splendidus, V. tapetis and unidentified bacteria loosely associated with ultramicrobacteria (Figure 6.24 [see colour section]). External abscesses These may be present with infections by Aer. hydrophila (Figures 6.25, 6.26 [see colour section]). Car. piscicola, Edw. tarda, Lactobacillus spp., Lactococcus piscium, Ren. salmoninarum and Vag. salmoninarum. Furuncles (or boils) These are characteristic of infections by Aer. salmonicida (Figures 6.27, 6.28 [see colour section]).
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Diagnosis 193 Blood-filled blisters on the flank These have been described in infections by Car. piscicola, Lactobacillus spp., Lactococcus piscium, Ren. salmoninarum (Figure 6.29 [see colour section]) and Vag. salmoninarum. Protruded anus/vent This is symptomatic of infection by Edw. tarda and Plesiomonas shigelloides. Haemorrhaging around the vent This occurs in infections caused by En. faecalis subsp. liquefaciens, Plesiomonas shigelloides, V. anguillarum, V. ordalii and V. splendidus. Necrotic lesions on the caudal peduncle This occurs with Str. dysgalactiae Emaciation (this should not be confused with starvation) This has been described for mycobacteriosis and nocardiosis, and infections by Bacillus spp., Fla. johnsoniae and Str. parauberis. Inappetence This is a common sign of many infections caused by bacterial fish pathogens. Never- theless, loss of appetite is particularly associated with diseases caused by Aer. hydro- phila, Aer. salmonicida, Bac. mycoides, Cit.freundii, Cor. aquaticum, Myc. abscessus, Pasteurella skyensis, Piscirickettsia salmonis, Plesiomonas shigelloides, V. splendidus and V. tapetis.
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  • Bacteria, representative, gram-negative bacteria

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