Transmission of PKX, the causative agent of proliferative kidney disease (PKD), to rainbow trout Oncorhynchus mykiss following filtration of water and sediments

Ronald Hedrick, D. Monge, P. De Kinkelin

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

PKX, the myxosporean causing proliferative kidney disease (PKD), was transmitted to rainbow trout Oncorhynchus rnykiss following their exposure to filtered sedirnents and water from a recycled water system where PKD is enzootic. Suspended sedirnents (25 1) were passed sequentially through 500, 250, 100 and 50 pm screens. Infectivity was found with material trapped at 500 pm and in water passing the 50 pm screen. No infectivity was found with material trapped on the 250, 100 or 50 pm screens. In a second study, 180 1 of water was passed sequentially through a series of filters identical to those used in the sediment trial. No infectivity was trapped on any size filter (500 to 50 pm) but 10 of 20 trout exposed to water passing all filters were infected with PKX. The association of PKX infectivity with material 500 pm in the sediments and with a stage smaller than 50 pm in the water is consistent with the hypothesis that a second host residing in the sediments releases a smaller infective stage found in the water, as shown for other myxosporean/ actinosporean parasite life cycles. A small oligochaete (Stylaria lacustris) found on the 500 pm filter is under investigation as the possible secondlalternate host of the PKX rnyxosporean.

Original languageEnglish (US)
Pages (from-to)237-240
Number of pages4
JournalDiseases of Aquatic Organisms
Volume14
DOIs
StatePublished - Jan 1 1992

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kidney diseases
rainbow
Oncorhynchus mykiss
infectivity
sediments
sediment
pathogenicity
filter
water
Oncorhynchus
Oligochaeta
trout
life cycle (organisms)
parasite
life cycle
parasites
material

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Aquatic Science

Cite this

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title = "Transmission of PKX, the causative agent of proliferative kidney disease (PKD), to rainbow trout Oncorhynchus mykiss following filtration of water and sediments",
abstract = "PKX, the myxosporean causing proliferative kidney disease (PKD), was transmitted to rainbow trout Oncorhynchus rnykiss following their exposure to filtered sedirnents and water from a recycled water system where PKD is enzootic. Suspended sedirnents (25 1) were passed sequentially through 500, 250, 100 and 50 pm screens. Infectivity was found with material trapped at 500 pm and in water passing the 50 pm screen. No infectivity was found with material trapped on the 250, 100 or 50 pm screens. In a second study, 180 1 of water was passed sequentially through a series of filters identical to those used in the sediment trial. No infectivity was trapped on any size filter (500 to 50 pm) but 10 of 20 trout exposed to water passing all filters were infected with PKX. The association of PKX infectivity with material 500 pm in the sediments and with a stage smaller than 50 pm in the water is consistent with the hypothesis that a second host residing in the sediments releases a smaller infective stage found in the water, as shown for other myxosporean/ actinosporean parasite life cycles. A small oligochaete (Stylaria lacustris) found on the 500 pm filter is under investigation as the possible secondlalternate host of the PKX rnyxosporean.",
author = "Ronald Hedrick and D. Monge and {De Kinkelin}, P.",
year = "1992",
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