Proliferative kidney disease and renal myxosporidiosis in juvenile salmonids from rivers in England and Wales

Feist, Stephen W.; Peeler, E. J.; Gardiner, R.; Smith, Emily R.C.; Longshaw, Matt

doi:10.1046/j.1365-2761.2002.00361.x

Cited by 47 publications

(58 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A kidney parasite of the genus Chloromyxum has been mentioned in several reports from brown trout and Atlantic salmon in Europe (Sedlaczek, 1991 ;Holst et al 1993 ;Feist et al 2002 ;Shul'man and Ieshko, 2003 ;Holzer et al 2004). The similarity of the measurements taken from mature spores suggest that all reports relate to the same species, named Chloromyxum schurovi Schul'man and Ieshko 2003, which has recently been re-described (Holzer et al manuscript submitted) and which is the species this study refers to.…”

Section: Myxozoan Species In Brown Troutmentioning

confidence: 53%

Molecular studies on the seasonal occurrence and development of five myxozoans in farmed Salmo trutta L.

2005

View full text Add to dashboard Cite

S U M M A R YFive myxozoan species, Tetracapsuloides bryosalmonae, Sphaerospora truttae, Chloromyxum schurovi, Chloromyxum truttae and a Myxobolus species were detected in farmed brown trout, Salmo trutta L. from Central Scotland. Using PCR and in situ hybridization, this study investigated the seasonal occurrence and tissue location of these species in young of the year brown trout. C. schurovi, C. truttae and Myxobolus sp. were first detected in brown trout in April, 2 months before T. bryosalmonae and S. truttae. T. bryosalmonae and S. truttae showed proliferation in the blood with intravascular stages of T. bryosalmonae accumulating in the heart. In contrast, only small amounts of PCR products of C. schurovi and C. truttae were obtained from the blood, suggesting that these species use the vascular system for transport but proliferate only in their target tissues from which large amounts of PCR product were obtained and where parasites were visible in histological sections. Large amounts of PCR product were obtained for T. bryosalmonae, S. truttae and both Chloromyxum species from the gills of brown trout, suggesting the gills as entry locus for these species. The neurotropic Myxobolus species formed plasmodia predominantly in the peripheral nerves, possibly indicating an entry route through the skin. Presporogonic stages of all other species had disappeared by September and mature spores were present from August onwards.

show abstract

Section: Myxozoan Species In Brown Troutmentioning

confidence: 53%

Molecular studies on the seasonal occurrence and development of five myxozoans in farmed Salmo trutta L.

2005

View full text Add to dashboard Cite

show abstract

“…While S. renicola spores and pseudoplasmodia cause damage to the host organism primarily by occupying space within the renal tubules, the PKX pseudoplasmodia of Tetraspora bryozoides causing proliferative kidney disease grow in the renal interstitium and the proteins released by disintegrating mother cells exert a continuous antigen effect on the humoral and cellular defence mechanisms of the host (Clifton-Hadley et al, 1987;Feist et al, 2002).…”

Section: Discussionmentioning

confidence: 99%

Reno-, hepato- and splenomegaly of common carp fingerlings (Cyprinus carpio L.) diseased in swimbladder inflammation caused by Sphaerospora renicola Dyková et Lom, 1982

Al-Samman

Molnár

Székely

et al. 2003

Acta Veterinaria Hungarica

View full text Add to dashboard Cite

The weight of internal organs (swimbladder, kidney, liver, spleen) in relation to the body weight was studied in common carp fingerlings divided into three groups on the basis of swimbladder appearance and microscopic examination of the kidney. The fish had been collected from different Hungarian fish farms at the time when swimbladder inflammation (SBI) usually occurs (in July and August). The first group comprised fish with severe signs of SBI and massive renal sphaerosporosis, the second group consisted of fish with milder swimbladder changes and/or kidney infection by a low number of Sphaerospora renicola, while the third group was constituted by infection-free common carp fry. Statistical analysis of swimbladder, kidney, liver and spleen weight in relation to the body weight revealed that in the infected groups the internal organs were substantially enlarged. This suggests that in common carp fry with SBI the swimbladder changes are accompanied by reno-, hepato-and splenomegaly.

show abstract

“…For example, the prevalence of PKD is spatially variable within and among river systems (Feist et al 2002, Sterud et al 2007, Wahli et al 2008, Skovgaard & Buchmann 2012. However, the potential effects of temporal variation, different life history strategies (e.g.…”

Section: Resale or Republication Not Permitted Without Written Consenmentioning

confidence: 99%

“…Yet, several authors have stressed the importance of temporal analysis when studying the epidemiology of PKD (Feist et al 2002, Wahli et al 2007, Okamura et al 2011. Similarly to earlier work showing a seasonal occurrence of PKD (Foott & Hedrick 1987, Hedrick et al 1993, we detected a significant temporal increase in T. bryosalmonae prevalence in the summer 2010, during a 1 mo period (River Vainupea, Site 11) where parasite prevalence in 0+ trout increased from 0 (95% CI: 0−39%) at the beginning of July to 68% (95% CI: 47−84%) on 5 August.…”

Section: Temporal Variation In Tetracapsuloides Bryosalmonae Prevalencementioning

confidence: 99%

Proliferative kidney disease (PKD) agent Tetracapsuloides bryosalmonae in brown trout populations in Estonia

Dash¹,

Vasemägi²

2014

Dis. Aquat. Org.

View full text Add to dashboard Cite

Proliferative kidney disease (PKD) caused by the myxozoan parasite Tetracapsuloides bryosalmonae is a serious parasitic disease threatening both farmed and wild salmonid populations, but very little is currently known about the distribution of the parasite in the Baltic Sea region. In this study we (1) report the development of a novel multiplex PCR method for fast and reliable screening of T. bryosalmonae; (2) use this multiplex PCR method to show that the PKD agent T. bryosalmonae is widespread in natural brown trout Salmo trutta L. populations in Estonia; (3) evaluate monthly and yearly variation of T. bryosalmonae prevalence in juvenile trout; (4) assess T. bryosalmonae prevalence in different age-classes of fish (0+ vs. 1+ and older) and report the presence of the PKD agent in the kidneys of returning sea trout spawners; and (5) suggest the freshwater bryozoan Plumatella fungosa as a putative invertebrate host of T. bryo salmonae in Estonia. Our results demonstrate a highly heterogeneous distribution of T. bryosalmonae at the micro-geographic scale, indicating that PKD could have an important negative effect on recruitment in Estonian brown trout populations.KEY WORDS: Tetracapsuloides bryosalmonae · Salmo trutta · Salmonid fish · Natural population · Parasite · Host · Myxozoa · Bryozoa Resale or republication not permitted without written consent of the publisherDis Aquat Org 109: [139][140][141][142][143][144][145][146][147][148] 2014 While the effects of temperature on T. bryosalmonae proliferation and the renal pathological responses of the salmonid host are well documented, considerably less is known about the distribution of the parasite and the severity of PKD in wild salmonid populations (Sterud et al. 2007, Peeler et al. 2008, Kristmundsson et al. 2010, Okamura et al. 2011, Skovgaard & Buchmann 2012. For example, the prevalence of PKD is spatially variable within and among river systems (Feist et al. 2002, Sterud et al. 2007, Wahli et al. 2008, Skovgaard & Buchmann 2012. However, the potential effects of temporal variation, different life history strategies (e.g. migratory vs. resident fish), and juvenile age on T. bryosalmonae prevalence is not known. Yet, such knowledge is necessary for a better understanding of the life cycle and dispersal of T. bryosalmonae, and the epidemiology of PKD.The Baltic Sea catchment contains approximately 1000 anadromous brown trout Salmo trutta L. populations and numerous wild resident brown trout stocks (HELCOM 2011). Very little is currently known about the distribution of the PKD-causing parasite T. bryosalmonae and its bryozoan host(s) in the Baltic Sea region and its potential impact on wild trout populations (Skovgaard & Buchmann 2012). Earlier reports from Estonia documented the occurrence of T. bryosalmonae in Atlantic salmon and brown trout in a few rivers based on histopathological work (Kadakas et al. 2001), but no information is available on the prevalence of T. bryosalmonae among wild anadromous and resident brown trout populations in Eston...

show abstract

Proliferative kidney disease and renal myxosporidiosis in juvenile salmonids from rivers in England and Wales

Cited by 47 publications

References 22 publications

Molecular studies on the seasonal occurrence and development of five myxozoans in farmed Salmo trutta L.

Molecular studies on the seasonal occurrence and development of five myxozoans in farmed Salmo trutta L.

Reno-, hepato- and splenomegaly of common carp fingerlings (Cyprinus carpio L.) diseased in swimbladder inflammation caused by Sphaerospora renicola Dyková et Lom, 1982

Proliferative kidney disease (PKD) agent Tetracapsuloides bryosalmonae in brown trout populations in Estonia

Contact Info

Product

Resources

About