PhD theses

All Wageningen University PhD theses

  • external user (warningwarning)
  • Log in as
  • language uk
  • About

    Wageningen PhD theses


    This database contains bibliographic descriptions of all Wageningen University PhD theses from 1920 onwards. It is updated on a daily basis by WUR Library.

    Author abstracts and/or summaries are added to all descriptions. A link to the full text dissertation is added to the bibliographic description. In a few cases, no electronic version is available, mostly because of copyright issues.

    Hard copies of all theses are available for loan at WUR Library. To request them, click the link Request this publication in the full record presentation. This is a fee based service.

    mail icon WUR Library, 9 july 2012

     

Record number 2032073
Title Transmission and control of Fish-borne Zoonotic Trematodes in aquaculture
show extra info.
Annette S. Boerlage
Author(s) Boerlage, A.S.
Publisher [S.l. : s.n.]
Publication year 2013
Description 150 p fig., graf., tab
Notes Proefschrift Wageningenshow all notes
Met lit. opg. - Met samenvatting in het Engels en Nederlands
ISBN 9789461736284
Tutors Jong, Prof. dr. ir. M.C.M. de ; Verreth, Prof. dr. J.A.J. ; Graat, Dr. ir. E.A.M.
Graduation date 2013-07-03
Dissertation no. 5502
Author abstract show abstract

 

Fish-borne Zoonotic Trematodes (FZTs) affect the health of millions of humans worldwide. For persistence, the life cycle of FZTs depends on aquatic snails, fish, and definitive hosts like humans, pigs or chickens. Definitive hosts can become infected by eating raw or undercooked fish. Integrated Agriculture Aquaculture (IAA) systems improve the livelihood of small scale farmers, but may enhance transmission of FZTs because all types of hosts and all transmission routes can be present on a single farm. This thesiscombines experiments, statistical analyses and mathematical modelling to gain insight into transmission mechanisms of FZTs to fish in aquaculture and to use this insight to compare and discuss control measures against FZTs. Currently, medication of humans is the main strategy to control FZTs. Modelling indicated that this does not lead to elimination of FZTs because both humans and definitive hosts other than humans will maintain the life cycle of FZTs independently. Treatment of (a part of) these host types may eliminate FZTs, e.g. treating all humans and 54% of definitive hosts other than humans. Aquaculture may provide opportunities for control of FZTs by adapting management measures. Experiments showed that smaller fish get more often and more heavily infected with FZTs than larger fish; common carp (Cyprinus carpio) of more than 50 g rarely acquire new infections. Once carp are infected, FZTs persist for at least 27 weeks, implying that harvestable fish still contain FZTs and, therefore, are a risk to human health. In most IAA systems, fish are kept FZT free until 0.5 g before being stocked into a fish pond where they are very likely to be exposed to FZTs. Stocking fish at more than 25 g, or at more than 14 g in combination with treating all humans with anthelmintics, may lead to elimination of FZTs. Also, control of snails by either decreasing density or increasing mortality of snails may lead to elimination of FZTs in aquaculture. Farmers and policy makers should evaluate which combination of control measures is attractive to them.

Online full textINTERNET
On paper Get the document, find related information or use other SFX services
Keyword(s) trematoda / carp / fishes / zoonoses / disease transmission / disease control / disease models / fish farms / fish culture / aquaculture / parasitology
Categories Cultured Fishes / Veterinary Epidemiology
Publication type PhD thesis
Language English
Comments
There are no comments yet. You can post the first one!
Post a comment
 

To support researchers to publish their research Open Access, deals have been negotiated with various publishers. Depending on the deal, a discount is provided for the author on the Article Processing Charges that need to be paid by the author to publish an article Open Access. A discount of 100% means that (after approval) the author does not have to pay Article Processing Charges.

For the approval of an Open Access deal for an article, the corresponding author of this article must be affiliated with Wageningen University & Research.

Please log in to use this service. Login as Wageningen University & Research user or guest user in upper right hand corner of this page.