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Abstract

Antioxidant defense system and oxidative stress biomarkers were determined in the liver tissue from males and females of sea trout (Salmo trutta m. trutta L.) affected by Aeromonas hydrofila infection causing ulcerative dermal necrosis (UDN) syndrome. Histological results from hepatic parenchyma in UDN-affected trout show that cytoplasmic vacuolation of hepatocytes, loss of normal basophilia by cytoplasm, presence of pigment deposition in the parenchyma are a signs of liver deterioration. Impaired circulation in the liver of UDN-affected females manifests in oedema and an occurrence of a large number of erythrocytes in the sinusoids and the intercellular space. In both UDN-affected males and females, protein oxidation showed higher values as compared to the healthy trout. UDN syndrome caused a decrease of antioxidant enzyme activities. This might be due to inactivation of the above-mentioned enzymes by the end products of protein oxidation. The importance of the glutathione-mediated antioxidant defense system in UDN-induced oxidative stress was demonstrated. Results showed that UDN syndrome led to an oxidative stress in liver tissue able to increase of the oxidatively modified protein level.

Dietary Supplementation with R-(+)-Limonene Improves Growth, Metabolism, Stress, and Antioxidant Responses of Silver Catfish Uninfected and Infected with Aeromonas hydrophila

“…•− levels in combination with decreased SOD activity. A study with brown trout (Salmo trutta trutta) showed that infection with A. hydrophila reduced the activity of SOD and CAT enzymes [110]. In this investigation, we observed significant interactions between the effects of dietary supplementation with R-(+)-limonene and A. hydrophila infection on O 2…”

Influence of Feeding Quinoa (Chenopodium quinoa) Seeds and Prickly Pear Fruit (Opuntia ficus indica) Peel on the Immune Response and Resistance to Aeromonas sobria Infection in Nile Tilapia (Oreochromis niloticus)

“…The detrimental impact of bacterial infections on the organism's tissues is partly associated with the promotion of oxidative stress [119]. The flavonoids present in the plants provide a beneficial antioxidant effect through their capability of scavenging the ROS and consequently reducing their harmful effects [120].…”

Potential role of climate change on the spread of salmonid skin condition: the biogeochemical hypothesis on ulcerative dermal necrosis on the Słupia River - Poland

“…The first UDN outbreak was reported in Scotland, dated 1820, thus in the heart of the Industrial Revolution period (1733 -1913) (Grimble, 1899). The number of UDN cases is still growing in Europe (Figure 2) (Munro, 1970;Ljungberg and Johansson, 1977;Meier et al, 1977;Lounatmaa and Janatuinen, 1978;Johansson et al, 1982;Larsen and Jensen, 1982;Eiras and Saraiva, 1988;Roberts, 1993;Law, 2001;Kurhalyuk et al, 2009;Grudniewska et al, 2011;Kazuńet al, 2011;Kurhalyuk et al, 2011;Grudniewska et al, 2012;Grawiński and Kozińska, 2013;Tkachenko et al, 2014;Ciepliński et al, 2018). The first report of UDN for the Baltic region indicates the first occurrence in 1972 (Roberts, 1993), while the first significant outbreak of UDN in the Słupia River occurred in 2007 (Ciepliński et al, 2018).…”

“…Thus, the variability of temperature may be reflected in the dynamics of the pH difference between the river and the sea (Figure 3). The changing environmental conditions, including acid-base water properties, may cause detrimental effects and diseases in fish not acclimatized to new The map of the UDN occurrence (Grimble, 1899;Munro, 1970;Ljungberg and Johansson, 1977;Meier et al, 1977;Lounatmaa and Janatuinen, 1978;Johansson et al, 1982;Larsen and Jensen, 1982;Eiras and Saraiva, 1988;Roberts, 1993;Law, 2001;Kurhalyuk et al, 2009;Grudniewska et al, 2011;Kazuńet al, 2011;Kurhalyuk et al, 2011;Grudniewska et al, 2012;Grawiński and Kozińska, 2013;Tkachenko et al, 2014;Ciepliński et al, 2018). The inserts show the number of UDN-oriented publications by year and by country (Scopus).…”