Dynamics of<i>Myxobolus cerebralis</i>in the Lostine River, Oregon: Implications for Resident and Anadromous Salmonids

Sandell, Todd; Lorz, Harriet V.; Stevens, Donald G.; Bartholomew, Jerri L.

doi:10.1577/1548-8667(2001)013<0142:domcit>2.0.co;2

Cited by 33 publications

(43 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This variation suggests seasonal patterns of infection risk, although many questions remain. In Montana (Baldwin et al 2000) and Oregon (Sandell et al 2001), the prevalence of infection varied seasonally and was significantly higher later in the calendar year. In Yellowstone Lake tributaries, sentinel fry infection was most prevalent and (especially) severe early in the season (mid-July).…”

Section: Environmental Aspects Of Myxobolus Cerebralis Infection Riskmentioning

confidence: 96%

“…Levels of ammonium, chloride, sulfate, and phosphorus were generally much higher in Pelican Creek than in the other streams. Specific conductivity was much higher (319-322 lS/cm) in Pelican and Beaverdam creeks and may indicate the higher overall productive potential of these streams; this parameter has been significantly correlated with M. cerebralis infection prevalence in Oregon, where specific conductivities were in the same range as those of Yellowstone Lake tributaries (Sandell et al 2001).…”

Section: Environmental Aspects Of Myxobolus Cerebralis Infection Riskmentioning

confidence: 97%

See 1 more Smart Citation

Myxobolus cerebralis in Native Cutthroat Trout of the Yellowstone Lake Ecosystem

et al. 2006

View full text Add to dashboard Cite

Abstract.-The exotic parasite Myxobolus cerebralis was first detected in native adult Yellowstone cutthroat trout Oncorhynchus clarkii bouvierii from Yellowstone Lake in 1998, seriously threatening the ecological integrity of this pristine, naturally functioning ecosystem. We immediately began to assess the prevalence and spatial extent of M. cerebralis infection in Yellowstone cutthroat trout within Yellowstone Lake and to determine the infection risk of age-0 Yellowstone cutthroat trout, the relative abundance and actinospore production of tubificid worms, and the basic environmental characteristics of tributaries. During 1999-2001, juvenile and adult Yellowstone cutthroat trout were infected throughout Yellowstone Lake; the highest prevalence (15.3-16.4%) occurred in the northern and central regions. Exposure studies in 13 streams indicated that Pelican and Clear creeks and the Yellowstone River were positive for M. cerebralis; the highest prevalence (100%) and severity was found in Pelican Creek during mid-July. Sexually mature individuals of the oligochaete Tubifex tubifex were most abundant in early summer, were genetically homogenous, and were members of a lineage known to produce moderate to high levels of M. cerebralis triactinomyxons. Only 20 of the 3,037 sampled tubificids produced actinospores after 7 d in culture, and none of the actinospores were M. cerebralis. However, one non-actinospore-producing T. tubifex from Pelican Creek tested positive for M. cerebralis by polymerase chain reaction. Stream temperatures at Pelican Creek, a fourth-order, low-gradient stream, were over 208C during the first exposure period, suggesting that T. tubifex were capable of producing triactinomyxons at elevated temperatures in the wild. Although the infection of otherwise healthy adult Yellowstone cutthroat trout within Yellowstone Lake suggests some resistance, our sentinel cage exposures indicated that this subspecies may be more susceptible to whirling disease than previous laboratory challenges have indicated, and M. cerebralis may be contributing to a significant recent decline in this population.

show abstract

Section: Environmental Aspects Of Myxobolus Cerebralis Infection Riskmentioning

confidence: 96%

Section: Environmental Aspects Of Myxobolus Cerebralis Infection Riskmentioning

confidence: 97%

Myxobolus cerebralis in Native Cutthroat Trout of the Yellowstone Lake Ecosystem

et al. 2006

View full text Add to dashboard Cite

show abstract

“…The influence of temperature stress on Myxobolus cerebralis infection in rainbow and cutthroat trout is well recognized (Markiw 1992, Vincent 2002, de la Hoz Franco & Budy 2004, Krueger et al 2006. But, few studies have examined its relationship with conductivity (but see Sandell et al 2001), or their potentially synergistic effects -or additional stressors -and salmonid vulnerability to whirling disease. In Sandell et al (2001), only conductivity correlated with infection prevalence among sentinel rainbow trout, but not temperature, pH, or total dissolved solids -perhaps because these were not analyzed concurrently but individually against presence/ absence of infection.…”

Section: Discussionmentioning

confidence: 99%

“…But, few studies have examined its relationship with conductivity (but see Sandell et al 2001), or their potentially synergistic effects -or additional stressors -and salmonid vulnerability to whirling disease. In Sandell et al (2001), only conductivity correlated with infection prevalence among sentinel rainbow trout, but not temperature, pH, or total dissolved solids -perhaps because these were not analyzed concurrently but individually against presence/ absence of infection.Although prior research shows an optimal temperature range of 15 to 17°C for Myxobolus cerebralis spore production, infection and development in the fish host (Halliday 1976, MacConnell & Vincent 2002, we did not find a high proportion of moderately to highly infected fish in that temperature range (e.g. middle site in July 2002, 16.1°C).…”

mentioning

confidence: 99%

“…oligochaetes) or physico-chemical stressors accumulated and carried throughout the drainage from upstream. This is a common pattern of Myxobolus cerebralis infection in the wild whereby infection prevalence and severity increase in a downstream progression (Hiner & Moffitt 2001, Sandell et al 2001, Hubert et al 2002. For example, we observed severe jaw and cranial infection in fry from the lower site in September even under low temperature (12.4°C) and high specific conductivity (319 µS).…”

mentioning

confidence: 99%

See 1 more Smart Citation

Correlation of environmental attributes with histopathology of native Yellowstone cutthroat trout naturally infected with Myxobolus cerebralis

Murcia

Kerans²,

MacConnell³

et al. 2011

Dis. Aquat. Org.

View full text Add to dashboard Cite

Infection by the invasive parasite Myxobolus cerebralis (causing whirling disease in salmonids) is strongly influenced by a stream's physico-chemical characteristics, which might affect host pathology. We examined whether environmental variables of a M. cerebralis-positive tributary to Yellowstone Lake, Yellowstone National Park, USA, correlated with the histopathology of naturally infected native cutthroat trout Oncorhynchus clarkii bouvieri. Host inflammatory response and cranial cartilage lesions were the main correlates with whirling behavior. Canonical correlation analyses showed that the prevalence of trout with severe lesions in the cranial and jaw cartilages was highest in stream sites with a combination of high temperature and low specific conductivity. Our results reveal that environmental components can affect when and where a pathogen resides within the host, and manifestation of disease. Recognition of the synergism among environmental and histopathology factors most conducive to whirling disease will increase our prediction and detection abilities for M. cerebralis in salmonid hosts.KEY WORDS: Whirling disease · Pathogen · Invasion-environment synergism · Canonical correlation · Yellowstone ecosystem Resale or republication not permitted without written consent of the publisherDis Aquat Org 93: [225][226][227][228][229][230][231][232][233][234] 2011 Hydrothermal and high elevation streams are examples of systems where the physical and chemical environments are variable (e.g. severe temperature or pH fluctuations) and can inflict additional stresses on the native biota beyond seasonal changes. In Lake Wabamun in Alberta, Canada, thermal effluents facilitated parasite transmission between hosts throughout the year and increased prevalence of certain parasites (Sankurathri & Holmes 1976). Synergisms between infection by metacercaria and exposure to pesticides and herbicides were reported as the cause of vertebral deformities in frogs (Kiesecker 2002). These are examples of environments where natural (e.g. hydrothermal) and anthropogenic (e.g. pollutant) stressors often have a strong influence on parasite-host interactions and development of diseases.However, synergisms between the effects of environmental stressors and development of disease from parasitic infection in wild fish are seldom examined through a histopathology approach (but see Roubal 1994). Histopathology is key to identifying target organs of parasitic infection and pathogens' mode of action at the biochemical level of organization (severity of disease), which may affect ecosystem function at the population level of organization (Schwaiger 2001). Histopathological anomalies in fish, for example, are frequently used as indicators of chemical pollution in marine and fresh water environments (Schwaiger 2001, Wester et al. 2002, Kent et al. 2004, identifying risks of population declines. But we found no examples in the scientific literature of studies on the potential relationships between environmental stress and histopatholog...

show abstract

Host and Environmental Influences on Development of Disease

Schmidt‐Posthaus

Wahli

2015

Myxozoan Evolution, Ecology and Development

View full text Add to dashboard Cite

Dynamics ofMyxobolus cerebralisin the Lostine River, Oregon: Implications for Resident and Anadromous Salmonids

Cited by 33 publications

References 21 publications

Myxobolus cerebralis in Native Cutthroat Trout of the Yellowstone Lake Ecosystem

Myxobolus cerebralis in Native Cutthroat Trout of the Yellowstone Lake Ecosystem

Correlation of environmental attributes with histopathology of native Yellowstone cutthroat trout naturally infected with Myxobolus cerebralis

Host and Environmental Influences on Development of Disease

Contact Info

Product

Resources

About