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Işidan, Hakan; Bolat, Yusuf

doi:10.4194/1303-2712-v11_4_01

Cited by 8 publications

(6 citation statements)

References 19 publications

(32 reference statements)

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“…The first remarkable result obtained in this study was that the three viruses were detected in the wild fish populations screened both near and far from the coast, although the detection percentages varied according to the fish species sampled, the season, and the geographical locations of the sampling areas. In fact, these results are not surprising at all, considering that the ubiquity of these three viruses in wild fish has been previously established in several surveys (14,15,16,17,18,19,20,21,22,23,24). In most cases, the wild fish sampled in those surveys were asymptomatic, although several outbreaks with pathological signs of VNNV infection and detection of the virus in wild fish have been recorded in Europe, near the coasts of Portugal and Italy (11,25,26).…”

Section: Discussionmentioning

confidence: 85%

Surveillance of Viruses in Wild Fish Populations in Areas around the Gulf of Cadiz (South Atlantic Iberian Peninsula)

Moreno

Olveira

Labella

et al. 2014

Appl Environ Microbiol

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This report describes a viral epidemiological study of wild fish around the Gulf of Cadiz (southwestern Iberian Peninsula) and is focused on infectious pancreatic necrosis virus (IPNV), viral hemorrhagic septicemia virus (VHSV), and viral nervous necrosis virus (VNNV). One fish species (Chelon labrosus) was sampled inside the gulf, at the mouth of the San Pedro River. Another 29 were sampled, in three oceanographic campaigns, at sites around the Bay of Cadiz. The fish were processed individually and subjected to isolation in cell culture and molecular diagnosis. VHSV was not isolated from any species. Thirteen IPNV-type isolates were obtained from barracuda (Sphyraena sphyraena), axillary seabream (Pagellus acarne), common two-banded seabream (Diplodus vulgaris), common pandora (P. erythrinus), Senegal seabream (D. bellottii), and surmullet (Mullus surmuletus). Six VNNV isolates were obtained from axillary seabream, common pandora, black seabream (Spondyliosoma cantharus), red mullet (Mullet barbatus), Lusitanian toadfish (Halobatrachus didactylus), and tub gurnard (Chelidonichtys lucerna). In the river mouth, viruses were detected only after reamplification, obtaining prevalence percentages of IPNV and VNNV (44.4 and 63.0%, respectively) much higher than those observed in the oceanographic campaigns (25.7 and 19.6%, respectively). The opposite results were obtained in the case of VHSV after reamplification: 11.1% in the river mouth and 43.6% in the oceanic locations. Analyzing the results with respect to the proximity of the sampling sites to the coast, an anthropogenic influence on wild fish is suggested and discussed. The type of viruses and the presence of natural reassortants are also discussed. Microbial pathogens and potential hosts have coexisted in the marine environment for a long time. This coexistence allows the achievement of a balance between the pathogen and its host: The pathogen self-limits its virulence to reduce the negative effect on specific hosts, and the host uses defense strategies to minimize the negative consequence of the infection. The stressful conditions of intensive culture, however, usually break that equilibrium, and consequently, disease episodes probably occur more frequently than in natural environments.Among pathogens, the relevance of viral fish diseases relies on the high morbidity and mortality rates of infections and on the lack of effective treatments and prophylactic measures. In addition, several factors such as the vertical transmission of some fish viruses and the ability to establish chronic infections or carrier states among survivors must also be considered (1).The Ninth Report of the International Committee on Taxonomy of Viruses (2) formally recognizes 40 species of fish viruses in 11 taxonomic families. However, only a few studies of wild fish viruses have been performed, in contrast to those done with cultured or ornamental fish. This is probably due to the important losses that viral diseases cause in cultured fish. Moreover, since diseased or moribund animal...

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Section: Discussionmentioning

confidence: 85%

Surveillance of Viruses in Wild Fish Populations in Areas around the Gulf of Cadiz (South Atlantic Iberian Peninsula)

Moreno

Olveira

Labella

et al. 2014

Appl Environ Microbiol

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“…Viral hemorrhagic septicemia virus (VHSV) is among one of the most threatening viruses causing mass mortalities in turbot especially during early life stages (Pereiro, Figueras, and Novoa 2016). The disease outbreaks have been reported from different farms worldwide (Skall, Olesen, and Mellergaard 2005;Schlotfeldt et al 1991;Isidan and Bolat 2011). Turbot has been numerously subjected to experimental challenges with VHSV to assess the susceptibility of fish and pathogenicity of the virus (Brudeseth et al 2005;Snow and Smail 1999).…”

Section: Introductionmentioning

confidence: 99%

Effect of ploidy status of juvenile turbot, Scophthalmus maximus, on innate immune response and disease susceptibility against Aeromonas salmonicida, Vibrio anguillarum and Viral hemorrhagic septicemia virus

Işidan

Öztürk

Aydın

2021

Bulletin of the European Association of Fish Pathologists

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Triploid induction is a promising tool for sterility and triploid turbot showed improvement in growth after sexual maturation. However, it is essential to characterise the response of triploids to pathogens to evaluate their suitability to aquaculture. The aim of the study was to investigate the ploidy status of turbot on the innate immune response and susceptibility against Vibrio anguillarum, Aeromonas salmonicida, and viral haemorrhagic septicaemia virus (VHSV) infection. Diploid and triploid turbot were subjected to experimental infection with these pathogens via intraperitoneal (IP) injection and immersion. Antibody response against V. anguillarum and A. salmonicida was assessed at 0, 7, 14, 21, and 30 days post injection. A. salmonicida did not cause any mortality in ploidy groups. However, ploidy had significant effects on susceptibility against V. anguillarum and VHSV infections. Triploids were significantly more susceptible to both V. anguillarum and VHSV. While there were no significant difference in antibody response against V. anguillarum in ploidy groups, antibody response of diploid turbot against VHSV was significantly higher.

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“…The immersion challenges were performed by adding 100 ml relevant bacterial suspension to each test tanks except control tanks. Fish were exposed to L. garvieae, water flow was stopped for 5 h and then overnight culture of L. garvieae in NB was added to water to give a relevant final concentration (Altinok et al, 2001;King et al, 2001). During the experiments fish were fed twice a day with commercial fish diets.…”

Section: Infection Protocolmentioning

confidence: 99%

“…injection and reisolated to ensure that would reliably cause lactococcosis. This procedure was done in duplicate (Altinok et al, 2001). …”

Section: Bacteriamentioning

confidence: 99%

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Türe¹,

Haliloğlu²,

Altuntas³

et al. 2014

Turk. J. Fish. Aquat. Sci.

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Cited by 8 publications

References 19 publications

Surveillance of Viruses in Wild Fish Populations in Areas around the Gulf of Cadiz (South Atlantic Iberian Peninsula)

Surveillance of Viruses in Wild Fish Populations in Areas around the Gulf of Cadiz (South Atlantic Iberian Peninsula)

Effect of ploidy status of juvenile turbot, Scophthalmus maximus, on innate immune response and disease susceptibility against Aeromonas salmonicida, Vibrio anguillarum and Viral hemorrhagic septicemia virus

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