Types of Pathogens in Fish, Waterborne Diseases

Bricknell, Ian

doi:10.1016/b978-0-12-804564-0.00003-x

Cited by 6 publications

(4 citation statements)

References 171 publications

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“…This is in agreement with [21,22,23] who reported that the gill has the least count of bacterial count. The occurrence of these species in different organs of fish may be associated with some predisposing factors such as poor handling, feed and feeding, improper pond management, and excessive amounts of decomposing organic matter in the pond 25,26]. In a study carried out on bacterial infection on C. gariepinus, isolated and identified Staphylococcus aureus, E. coli, Staphylococcus epidermis and Pseudomonas fluorescens, it was observed that E. coli dominated [24,27,28].…”

Section: Discussionmentioning

confidence: 99%

Characterization and Isolation of Bacteria from Adult African Catfish (Clarias gariepinus) in Selected Fish Farms of Rivers State, Nigeria

Uedeme-Naa

John-Amadi²

2022

AJFAR

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This research examined the bacterial loads in the intestine, skin and gills of cultured Clarias gariepinus in some selected private farms at Eleme, Emohua, Ikwerre, Obio/Akpor and Port Harcourt Local Government Areas of Rivers State, Nigeria. Determination of bacterial loads species characterization in fish parts was done using standard microbiological procedures. Results of the assay showed high bacterial count in the gill, gut and skin of fish from the different locations, especially at Emuoha Local Government Area. The total heterotrophic bacteria counts of fish: gills ranged between 1.7X108 and 3.1 X 107; gut ranged between 1.4 X 107 and 7.2 X 106 and skin ranged between 1.5 X 106 and 6.8 X 106 in all the stations under consideration (Eleme, Emohua, Ikwerre, Obio/Akpor and Port Harcourt city Local Government Areas of Rivers State, Nigeria.). Bacterial genera isolated includs: Escherichia coli, Salmonella sp. Enterica sp., Staphylococcus sp., Bacillus sp., Shigella sp., Enterobacter sp., Klebsiella sp. and Citrobacter sp.

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Section: Discussionmentioning

confidence: 99%

Characterization and Isolation of Bacteria from Adult African Catfish (Clarias gariepinus) in Selected Fish Farms of Rivers State, Nigeria

Uedeme-Naa

John-Amadi²

2022

AJFAR

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“…2), a classic pathology concept (Gurr et al, 2011;Scholthof, 2007). This model examines the interactions between the environment (Beveridge, 2004;McNevin, 2017;Svobodova et al, 2017), the host (Boyd, 2017;Mateus et al, 2017;Thompson, 2017) and the infectious (or abiotic) agent (Bricknell, 2017;Oidtmann et al, 2011bOidtmann et al, , 2013, to understand how epidemics might be predicted, limited or controlled (Scholthof, 2007). The relationship between the three are complex, as the presence of a pathogen does not necessarily lead to the development of disease (Sitjà-Bobadilla and Oidtmann, 2017).…”

Section: Facilities Management and Disease Controlmentioning

confidence: 99%

“…Even with accumulated knowledge on pathogenic agents, many others will remain undescribed to science or will pass undetected, due to the vast number of fish species and diversity of pathogens that can infect them, but also due to lack of resources to carry out the necessary studies (Bricknell, 2017). In recent years there was greater attention on the implementation of management, production, and biosafety regulations, with the aim to reduce the impacts of aquaculture in the ecosystems (Oidtmann et al, 2011b;Vendramin et al, 2016).…”

Section: Facilities Management and Disease Controlmentioning

confidence: 99%

From aquaculture production to consumption: Freshness, safety, traceability and authentication, the four pillars of quality

2020

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“…A. hydrophila produces a cytotoxic enterotoxin that is the main source of tissue destruction, causing severe mortality within seven days (Janda & Abbott, ). A. hydrophila‐ infected fish show dermal ulcers, fin erosion, eye infections and even haemorrhagic septicaemia (Bricknell, ; Noga, ).…”

Section: Introductionmentioning

confidence: 99%

Dietary supplementation with low molecular weight sodium alginate improves growth, haematology, immune reactions and resistance againstAeromonas hydrophilainClarias gariepinus

2019

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A few studies have illustrated the effects of sodium salt derived from alginic acid on different fish species. However, little is known about the effect of sodium alginate on catfish (Clarias gariepinus). Therefore, this study was performed to assess the use of low molecular weight sodium alginate (LMWSA) in C. gariepinus. A total of 180 apparently healthy C. gariepinus with a mean body weight of 45 g were randomly divided into three equal groups (D1, D2 and D3). D1 the control group received a control diet, while D2 and D3 received 1% and 3% LMWSA, respectively, for 8 weeks. A challenge test against Aeromonas hydrophila was performed on 15 randomly selected catfish for 15 days. At the end of the experiment, catfish in D3 that received a diet of 3% LMWSA showed significant increases in the final body weight, weight gain and thermal‐unit growth coefficient compared with those in D2 and D1. There was a significant decrease in the erythrogram in D1 after the 4‐day pathogen challenge. A leucogram revealed leucocytosis, heterophilia and lymphocytosis in catfish in D2 and D3 compared with those in D1. After the 4‐day challenge, the following changes took place: lysozyme, nitric oxide, phagocytic activity and the respiratory burst were significantly elevated in catfish that received LMWSA and were more pronounced in D3 than in D1. The mortalities of catfish have been stopped after pathogen challenge from 8‐day in D1 and D2 where at 6‐day in D3. Thus, administration of 1% and 3% LMWSA enhances the growth, immune response and resistance of C. gariepinus against A. hydrophila.

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Types of Pathogens in Fish, Waterborne Diseases

Cited by 6 publications

References 171 publications

Characterization and Isolation of Bacteria from Adult African Catfish (Clarias gariepinus) in Selected Fish Farms of Rivers State, Nigeria

Characterization and Isolation of Bacteria from Adult African Catfish (Clarias gariepinus) in Selected Fish Farms of Rivers State, Nigeria

From aquaculture production to consumption: Freshness, safety, traceability and authentication, the four pillars of quality

Dietary supplementation with low molecular weight sodium alginate improves growth, haematology, immune reactions and resistance againstAeromonas hydrophilainClarias gariepinus

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