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Epitheliocystis Distribution and Characterization in Brown Trout (Salmo trutta) from the Headwaters of Two Major European Rivers, the Rhine and Rhone.

Guevara Soto M, Vaughan L, Segner H, Wahli T, Vidondo B, Schmidt-Posthaus H - Front Physiol (2016)

Bottom Line: Additionally, in two rivers in the Rhine catchment, a new species of Candidatus Similichlamydia was identified.Based on the histology, infection intensity, and severity of pathological changes were significantly more pronounced in mixed chlamydial infections, whereas single infections showed only low numbers of cysts and mild pathology.Infections could be found over a wide range of temperatures, which showed no correlation to infection prevalence or intensity.

View Article: PubMed Central - PubMed

Affiliation: Department of Infectious Diseases and Pathobiology, Centre of Fish and Wildlife Health, University of Bern Bern, Switzerland.

ABSTRACT
We present a first description of the distribution and characterization of epitheliocystis infections in brown trout (Salmo trutta) from the upper catchments of two major European rivers, the Rhine and the Rhone. Overall, epitheliocystis was widely distributed, with 70% of the Rhine and 67% of the Rhone sites harboring epitheliocystis positive brown trout. The epitheliocystis agents Candidatus Piscichlamydia salmonis and Candidatus Clavichlamydia salmonicola could be identified in both catchments, although their relative proportions differed from site to site. Additionally, in two rivers in the Rhine catchment, a new species of Candidatus Similichlamydia was identified. Based on the histology, infection intensity, and severity of pathological changes were significantly more pronounced in mixed chlamydial infections, whereas single infections showed only low numbers of cysts and mild pathology. Infections could be found over a wide range of temperatures, which showed no correlation to infection prevalence or intensity.

No MeSH data available.


Related in: MedlinePlus

Box Plots of severity of pathological lesions (edema, infiltration, lamellar fusion) and number of cysts per gill arch (infection intensity) (note the logarithmic scale in the y axis).
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Figure 6: Box Plots of severity of pathological lesions (edema, infiltration, lamellar fusion) and number of cysts per gill arch (infection intensity) (note the logarithmic scale in the y axis).

Mentions: Ca. P. salmonis infection usually showed a mild to moderate epithelial cell hyperplasia, mild edema and infiltration with mainly lymphocytes (Figure 4B), while Ca. C. salmonicola infection was only rarely associated with a host reaction (Figure 4C). Infection intensity (number of cysts per gill arch) was weakly associated with some of the pathological changes (Kruskal-Wallis rank sum tests: P = 0.052, P = 0.0011, P = 0.1609, edema, inflammation, and lamellar fusion, respectively) (Figure 6).


Epitheliocystis Distribution and Characterization in Brown Trout (Salmo trutta) from the Headwaters of Two Major European Rivers, the Rhine and Rhone.

Guevara Soto M, Vaughan L, Segner H, Wahli T, Vidondo B, Schmidt-Posthaus H - Front Physiol (2016)

Box Plots of severity of pathological lesions (edema, infiltration, lamellar fusion) and number of cysts per gill arch (infection intensity) (note the logarithmic scale in the y axis).
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4834352&req=5

Figure 6: Box Plots of severity of pathological lesions (edema, infiltration, lamellar fusion) and number of cysts per gill arch (infection intensity) (note the logarithmic scale in the y axis).
Mentions: Ca. P. salmonis infection usually showed a mild to moderate epithelial cell hyperplasia, mild edema and infiltration with mainly lymphocytes (Figure 4B), while Ca. C. salmonicola infection was only rarely associated with a host reaction (Figure 4C). Infection intensity (number of cysts per gill arch) was weakly associated with some of the pathological changes (Kruskal-Wallis rank sum tests: P = 0.052, P = 0.0011, P = 0.1609, edema, inflammation, and lamellar fusion, respectively) (Figure 6).

Bottom Line: Additionally, in two rivers in the Rhine catchment, a new species of Candidatus Similichlamydia was identified.Based on the histology, infection intensity, and severity of pathological changes were significantly more pronounced in mixed chlamydial infections, whereas single infections showed only low numbers of cysts and mild pathology.Infections could be found over a wide range of temperatures, which showed no correlation to infection prevalence or intensity.

View Article: PubMed Central - PubMed

Affiliation: Department of Infectious Diseases and Pathobiology, Centre of Fish and Wildlife Health, University of Bern Bern, Switzerland.

ABSTRACT
We present a first description of the distribution and characterization of epitheliocystis infections in brown trout (Salmo trutta) from the upper catchments of two major European rivers, the Rhine and the Rhone. Overall, epitheliocystis was widely distributed, with 70% of the Rhine and 67% of the Rhone sites harboring epitheliocystis positive brown trout. The epitheliocystis agents Candidatus Piscichlamydia salmonis and Candidatus Clavichlamydia salmonicola could be identified in both catchments, although their relative proportions differed from site to site. Additionally, in two rivers in the Rhine catchment, a new species of Candidatus Similichlamydia was identified. Based on the histology, infection intensity, and severity of pathological changes were significantly more pronounced in mixed chlamydial infections, whereas single infections showed only low numbers of cysts and mild pathology. Infections could be found over a wide range of temperatures, which showed no correlation to infection prevalence or intensity.

No MeSH data available.


Related in: MedlinePlus