PUBLICATION

Viability of Pseudocapillaria tomentosa Eggs Exposed to Heat, Ultraviolet Light, Chlorine, Iodine, and Desiccation

Authors
Kent, M.L., Watral, V., Villegas, E.N., Gaulke, C.A.
ID
ZDB-PUB-190620-8
Date
2019
Source
Zebrafish   16(5): 460-468 (Journal)
Registered Authors
Kent, Michael
Keywords
, UV, chlorine, desiccation, heat, iodine, zebrafish
MeSH Terms
  • Animals
  • Cell Survival/drug effects
  • Chlorine/pharmacology*
  • Disinfectants/pharmacology
  • Hot Temperature
  • Iodine/pharmacology*
  • Nematoda/drug effects*
  • Nematoda/radiation effects*
  • Ovum/drug effects*
  • Ovum/radiation effects*
  • Ultraviolet Rays
  • Water
  • Zebrafish
PubMed
31216245 Full text @ Zebrafish
Abstract
Pseudocapillaria tomentosa is an important pathogen in zebrafish facilities. We investigated heat, ultraviolet (UV) light, chlorine, iodine, and dessciation for killing the parasite's eggs. Eggs released with feces larvate in about 5-10 days, and treatments were evaluated by exposing fresh eggs and subsequently comparing larvation to untreated eggs as an indication of survival. Collectively, untreated eggs in all trials showed high levels of survival. Eggs were exposed to elevated temperatures (40°C, 45°C and 50°C) for 1, 8, or 24 h, which resulted in substantial reduction in viability of eggs. UV radiation was effective, with no larvation at 50-300 mWs/cm2 and <2% at 20 mWs/cm2. Three chlorine products (JT Baker, Clorox®, and Bi-Mart) were tested at 25, 50, 100, 500, and 3,000 ppm (pH 7.0-7.3) with 10 min exposure. All were effective at 500 or 1,000 ppm. There was variability between three products and trials at lower concentrations, but overall chlorine was not very effective at 25-100 ppm except for Bi-Mart brand at 100 ppm. Povidone-iodine was not effective at 25 or 50 ppm for 10 min, but was effective at 200 ppm for 1 h. Desiccation was effective, and no eggs larvated after 2 h drying.
Genes / Markers
Figures
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Expression
Phenotype
Mutation and Transgenics
Human Disease / Model Data
Sequence Targeting Reagents
Fish
Antibodies
Orthology
Engineered Foreign Genes
Mapping
Errata and Notes