Effects of long duration, low dose bronopol exposure on the control of Ichthyophthirius multifiliis (Ciliophora), parasitising rainbow trout (Oncorhynchus mykiss Walbaum)

Ichthyophthirius multifiliis Fouquet, 1876 infections on intensively reared fish stocks can increase rapidly, which if left unmanaged, can result in the heavy loss of stock. The present study explores the efficacy of long duration, low dose (1, 2 and 5mgL−1) treatments of bronopol (marketed as Pycez...

Full description

Saved in:
Bibliographic Details
Published in:Veterinary parasitology 2012-05, Vol.186 (3-4), p.237-244
Main Authors: Picón-Camacho, Sara M., Taylor, Nicholas G.H., Bron, James E., Guo, Fu Ci, Shinn, Andrew P.
Format: Article
Language:English
Subjects:
Animals
Anti-Infective Agents - administration & dosage
Anti-Infective Agents - therapeutic use
Aquaculture
aquaculture tanks
Bronopol
Chemotherapy
Ciliophora
Ciliophora - drug effects
Ciliophora Infections - drug therapy
Ciliophora Infections - veterinary
Dose-Response Relationship, Drug
Drug Administration Schedule
drugs
fish
Fish Diseases - drug therapy
Fish Diseases - parasitology
Ichthyophthirius multifiliis
Management
Oncorhynchus mykiss
parasites
parasitism
Propylene Glycols - administration & dosage
Propylene Glycols - therapeutic use
Pyceze
Whitespot
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Ichthyophthirius multifiliis Fouquet, 1876 infections on intensively reared fish stocks can increase rapidly, which if left unmanaged, can result in the heavy loss of stock. The present study explores the efficacy of long duration, low dose (1, 2 and 5mgL−1) treatments of bronopol (marketed as Pyceze™, Novartis Ltd.) in reducing the number of trophonts establishing on juvenile Oncorhynchus mykiss held under small scale culture conditions. The effect of bronopol on the colonisation success of infective theronts was also investigated by adding 2mgL−1 bronopol to the water prior and during the infection process. The number of parasites surviving on fish treated this way was compared to groups of fish that only received treatment after infection had occurred. The effect of bronopol on exiting trophonts throughout their external development to the point of theront release was also assessed through the delivery of 1mgL−1, 2mgL−1 and 5mgL−1 bronopol for up to 27 days consecutively (days 9–36 post-infection). The trial showed that a nominal dose of 2mgL−1 bronopol administered prior to infection significantly reduced the number of theronts surviving in the water column at the time of the initial challenge by 35–40% (P
ISSN:0304-4017
1873-2550
DOI:10.1016/j.vetpar.2011.11.022