PMID: 9193950May 1, 1997Paper

Transmission dynamics of helminth parasites of pigs on continuous pasture: Ascaris suum and Trichuris suis

International Journal for Parasitology
A Roepstorff, K D Murrell

Abstract

In Denmark, alternative outdoor production systems for pigs are becoming more frequent, and information on the transmission of Ascaris suum and Trichuris suis under continuously grazed pasture conditions is needed. A group of pigs was turned out on a pasture in May 1993 (Year 1 of the study), inoculated with 200 eggs of A. suum and 1000 eggs of T. suis, and followed parasitologically. A non-experimentally infected group of pigs was similarly turned out on the same pasture the following year (Year 2) and again followed parasitologically. Pasture infectivity was measured using helminth-naïve tracer pigs. During the summer of Year 1, A. suum eggs became infective within 4-6 weeks on the pasture. However, transmission was moderate until August of Year 2, when a pronounced increase in transmission occurred. After 2 months on the pasture, the continuously exposed pigs in summer seasons of both Years 1 and 2 harboured small overdispersed populations of adult A. suum, moderate numbers of liver white spots, and high specific IgG responses. These parasitological measures on chronically exposed pigs did not, however, correlate well with pasture infectivity or with each other. In contrast, the liver inflammation and specific IgG responses ...Continue Reading

Citations

Jul 1, 1997·International Journal for Parasitology·J BoesL S Stephenson
Sep 10, 1999·International Journal for Parasitology·P Nansen, A Roepstorff
Nov 15, 2001·Transactions of the Royal Society of Tropical Medicine and Hygiene·S PedersenH Friis
Oct 6, 2001·Veterinary Parasitology·A RoepstorffS Petkevicius
May 29, 1999·Veterinary Parasitology·A B HelwighP Nansen
Jun 3, 2006·Parasitology·H Mejer, A Roepstorff
Apr 17, 2009·Parasitology·P NejsumA Roepstorff
Nov 7, 2012·Parasitology·Kiran Kumar KatakamAnders Dalsgaard
Mar 5, 2011·Multiple Sclerosis : Clinical and Laboratory Research·J O FlemingZ Fabry
Jul 16, 2014·Parasitology·Kiran Kumar KatakamHelena Mejer
Feb 11, 2016·Parasites & Vectors·Kiran K KatakamHelena Mejer
Nov 26, 2009·Waste Management·Eva SzabováIngrid Papajová
Jan 13, 2015·Veterinary Parasitology·Annette AndreasenStig M Thamsborg
May 21, 2003·Journal of Helminthology·E FronteraI Navarrete

❮ Previous
Next ❯

Related Concepts

Related Feeds

Ascariasis (ASM)

Ascariasis is a helminthic infection of global distribution with more than 1.4 billion persons infected throughout the world. Here is the latest research.

Ascariasis

Ascariasis is a helminthic infection of global distribution with more than 1.4 billion persons infected throughout the world. Here is the latest research.