Occurrence of nodular gill disease in farmed brown trout (<i>Salmo trutta</i> L.)

Perolo, A.; Gustinelli, Andrea; Fioravanti, Marialetizia; Manfrin, Amedeo; Pozza, Manuela Dalla; Lunelli, F.; Accini, Adelchi; Quaglio, Francesco

doi:10.1111/jfd.13027

Cited by 12 publications

(16 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Different species of amoebae, including Vannella sp., capable of causing fish diseases, have been recovered from various fish species, including rainbow trout (Dyková & Lom, 2004), and cases of nodular gill diseases caused by Vannella sp. have been reported (Perolo et al, 2019). Amoebae feed on bacteria and debris, and if there is a high concentration of organic matter in the fish tank water, it makes up a favourable habitat for amoebae (Lasjerdi, Niyyati, Haghighi, Zaeri, & Nazemalhosseini Mojarad, 2011; Loret & Greub, 2010; Parry, 2004; Rogerson, 1991).…”

Section: Discussionmentioning

confidence: 94%

“…We have placed focus on the recovered amoebae as freshwater fish farms may suffer from heavy infestations with amoebae causing nodular gill disease (hyperplasia of filaments and lamellae associated with respiratory distress and mortality) if left untreated (Quaglio et al, 2016). These heavy infestations in highly intensive farming systems have previously caused major production losses in other countries such as Italy (Perolo et al, 2019). Different species of amoebae, including Vannella sp., capable of causing fish diseases, have been recovered from various fish species, including rainbow trout (Dyková & Lom, 2004), and cases of nodular gill diseases caused by Vannella sp.…”

Section: Discussionmentioning

confidence: 99%

“…A wide range of fish species are hosts to a series of skin and gill parasites including amoebae (Dyková, Figueras, Novoa, & Casal, 1998; Dyková, Kostka, Wortberg, Nardy, & Pecková, 2010; Dyková & Lom, 2004), and many are associated with severe gill pathology (Buchmann, Nielsen, Sigh, & Bresciani, 2004; Dyková et al, 2010; Dyková & Tyml, 2016; Nowak, Valdenegro‐Vega, Crosbie, & Bridle, 2014; Perolo et al, 2019). Rainbow trout ( Oncorhynchus mykiss ) farming in Denmark comprises rearing of trout in recirculated systems, conventional and organic earth ponds and concrete raceways and gill parasitic infections caused by Ichthyobodo, Apiosoma, Ambiphrya, and amoebae have also been recorded in all these systems (Buchmann & Bresciani, 1997; Buchmann, Nielsen, et al, 2004; Dyková & Tyml, 2016; Jørgensen, Larsen, & Buchmann, 2009).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Gill amoebae from freshwater rainbow trout (Oncorhynchus mykiss): In vitro evaluation of antiparasitic compounds againstVannellasp.

Jensen

Karami

Mathiessen

et al. 2020

Journal of Fish Diseases

View full text Add to dashboard Cite

Gill parasitic infections challenge farming of rainbow trout (Oncorhynchus mykiss, Walbaum) in freshwater facilities. Apart from flagellates (Ichthyobodo, (Pinto) and ciliates (Ichthyophthirius (Fouquet), Ambiphrya (Raabe), Apiosoma (Blanchard), Trichodinella (Sramek‐Husek) and Trichodina (Ehrenberg)), we have shown that amoebae are prevalent in Danish trout farms. Gills were isolated from farmed rainbow trout in six fish farms (conventional and organic earth pond and recirculated systems) and placed on non‐nutrient agar (NNA) moistened with modified Neff's amoeba saline (AS) (15°C). Gill amoebae from all examined fish colonized the agar and were identified based on morphological criteria showing species within the genera Trinema (Dujardin) (family Trinematidae), Vannella (Bovee) (family Vannellidae). In addition, hartmannellid amoebae were recorded. We established a monoculture of Vannella sp., confirmed the genus identity by PCR and sequencing and performed an in vitro determination of antiparasitic effects (dose–response studies) of various compounds including sodium chloride (NaCl), hydrogen peroxide, peracetic acid, formalin, aqueous garlic and oregano extracts and a Pseudomonas H6 surfactant. All amoebae were killed in concentrations of 16.90 mg/ml (garlic), 17.90 mg/ml (oregano), NaCl (7.5 mg/ml), hydrogen peroxide (100 µg/ml), peracetic acid (0.03 µg/ml), formaldehyde (25 µg/ml) and the Pseudomonas H6 surfactant (250 µg/ml).

show abstract

Section: Discussionmentioning

confidence: 94%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Gill amoebae from freshwater rainbow trout (Oncorhynchus mykiss): In vitro evaluation of antiparasitic compounds againstVannellasp.

Jensen

Karami

Mathiessen

et al. 2020

Journal of Fish Diseases

View full text Add to dashboard Cite

show abstract

“…The most important indicator of water quality in which trout live, both in the wild and in the pond system, is the gill tissue. This tissue is very sensitive to the change in oxygen concentrations and the degree of water pollution in which trout live (Perola et al 2019). The quality and volume density of the adipose tissue in trout muscles are an indicator of their lifestyle and thus the quality of the meat.…”

Section: Introductionmentioning

confidence: 99%

Comparative Analysis of Selected Tissues of Brown Trout from the Fish Pond and River Pliva, Bosnia and Herzegovina

Pajčin

Roljić

Ružić

et al. 2022

Croatian Journal of Fisheries

View full text Add to dashboard Cite

Brown trout is a common type of fish grown for consumption in open and flowing fish ponds on the rivers of Bosnia and Herzegovina. We conducted this study during three seasons (spring, summer and autumn) to obtain a complete picture of the morphological and histological characteristics of selected trout tissues. The physicochemical characteristics of the water from the Pliva River near Pljeva and the fish pond where intensive breeding of trout is carried out were analyzed. These analyses have shown that there are no major deviations in water quality and that the water in the pond is of excellent quality. A total of 90 trout were harvested during all three seasons and their morphometric characteristics were determined by analyzing ten parameters. After the dissection of all individuals, histological and stereological analysis was performed to compare the tissues of the liver, stomach, gills and muscles. These analyses showed significant differences in the histoarchitecture of selected trout tissues from the pond compared to the river. Liver tissue had altered hepatocyte shape and presence of adipocytes; stomach tissue had stronger mucosa and weaker muscle layer; gill tissue had lower respiratory lamellae; while muscle tissue had a significant presence of adipose tissue in brown trout living in the fish pond compared to those in the river. All these changes are due to the quality of commercial feed and the inability to move freely.

show abstract

“…and Hartmannella sp. (Dyková et al, 2010;Padrós & Constenla, 2021;Perolo et al, 2019;Quaglio et al, 2016;Speare, 1999).…”

mentioning

confidence: 99%

Amoeba species colonizing the gills of rainbow trout (Oncorhynchus mykiss) in Swiss aquaculture

Vannetti,

Wynne,

English

et al. 2023

Journal of Fish Diseases

View full text Add to dashboard Cite

Nodular gill disease (NGD) is an infectious condition characterized by proliferative gill lesions leading to respiratory problems, oxygen deficiency and mortality in fish. Globally, NGD primarily impacts freshwater salmonids in intensive aquaculture systems. In recent years, numerous outbreaks of severe gill disease have affected more than half of the larger rainbow trout (Oncorhynchus mykiss) farms in Switzerland, mainly during spring and early summer. Mortality has reached up to 50% in cases where no treatment was administered. Freshwater amoeba are the presumed aetiologic agent of NGD. The gross gill score (GS) categorising severity of gill pathology is a valuable first‐line diagnostic tool aiding fish farmers in identifying and quantifying amoebic gill disease (AGD) in farmed marine salmonids. In this study, the GS was adapted to the NGD outbreak in farmed trout in Switzerland. In addition to scoring disease severity, gill swabs from NGD‐affected rainbow trout were sampled and amoeba were cultured from these swabs. Morphologic and molecular methods identified six amoeba strains: Cochliopodium sp., Naegleria sp., Vannella sp., Ripella sp., Saccamoeba sp. and Mycamoeba sp. However, the importance of the different amoeba species for the onset and progression of NGD still has to be evaluated. This paper presents the first description of NGD with associated amoeba infection in farmed rainbow trout in Switzerland.

show abstract

Occurrence of nodular gill disease in farmed brown trout (Salmo trutta L.)

Cited by 12 publications

References 13 publications

Gill amoebae from freshwater rainbow trout (Oncorhynchus mykiss): In vitro evaluation of antiparasitic compounds againstVannellasp.

Gill amoebae from freshwater rainbow trout (Oncorhynchus mykiss): In vitro evaluation of antiparasitic compounds againstVannellasp.

Comparative Analysis of Selected Tissues of Brown Trout from the Fish Pond and River Pliva, Bosnia and Herzegovina

Amoeba species colonizing the gills of rainbow trout (Oncorhynchus mykiss) in Swiss aquaculture

Contact Info

Product

Resources

About