Impact of the implementation of the mcrebel management program in a commercial breed-to-wean unit following an infection with porcine reproductive and respiratory syndrome
type: CreativeWork
description: The objective of this study was to determine the effects of the implementation of the McRebel management program on pre-weaning mortality and timing of increase in the percentage of litters testing negative for the Porcine Reproductive and Respiratory Syndrome (PRRS) virus under commercial conditions. The study was carried out at a breed-to-wean facility that had recently tested positive for PRRS 1-7-4 wild type strain. The study used a randomized complete block design (blocking factor was farrowing date) with 2 treatments: 1) McRebel program (involved no cross-fostering with the implementation of additional biosecurity measures to eliminate cross-contamination); 2) Control (cross-fostering according to standard commercial procedures for PRRS negative farms and no additional biosecurity procedures). A total of 4,238 litters housed in 109 rooms forming 54 complete replicates were allotted onto the trial over nine weeks. Room was the experimental unit and a replicate consisted of 2 rooms; treatments were randomly allotted to room. Litter performance measurements were collected from the sow cards that recorded barn, room, crate, parity, sow identification, number piglets born alive and number of piglets weaned. Fluid sampling for diagnostic testing were collected from litters at processing for the McRebel treatment beginning at week 6 of the study; blood sampling for diagnostic testing were collected from litters at weaning for both treatments, beginning at week 7 of the study. The study was carried out for 10 weeks. A total of 18 fluid samples and 240 blood samples for diagnostic testing were collected throughout the study. Litter performance and piglet pre-weaning mortality data for each room were tested for normality and analyzed using the PROC MIXED procedure of SAS. Diagnostic data were analyzed using the Chi-square test using the PROC FREQ procedure of SAS. Pre-weaning mortality was greater (P < 0.05) for the McRebel than the Control treatment in several weeks of…
abstract: The objective of this study was to determine the effects of the implementation of the McRebel management program on pre-weaning mortality and timing of increase in the percentage of litters testing negative for the Porcine Reproductive and Respiratory Syndrome (PRRS) virus under commercial conditions. The study was carried out at a breed-to-wean facility that had recently tested positive for PRRS 1-7-4 wild type strain. The study used a randomized complete block design (blocking factor was farrowing date) with 2 treatments: 1) McRebel program (involved no cross-fostering with the implementation of additional biosecurity measures to eliminate cross-contamination); 2) Control (cross-fostering according to standard commercial procedures for PRRS negative farms and no additional biosecurity procedures). A total of 4,238 litters housed in 109 rooms forming 54 complete replicates were allotted onto the trial over nine weeks. Room was the experimental unit and a replicate consisted of 2 rooms; treatments were randomly allotted to room. Litter performance measurements were collected from the sow cards that recorded barn, room, crate, parity, sow identification, number piglets born alive and number of piglets weaned. Fluid sampling for diagnostic testing were collected from litters at processing for the McRebel treatment beginning at week 6 of the study; blood sampling for diagnostic testing were collected from litters at weaning for both treatments, beginning at week 7 of the study. The study was carried out for 10 weeks. A total of 18 fluid samples and 240 blood samples for diagnostic testing were collected throughout the study. Litter performance and piglet pre-weaning mortality data for each room were tested for normality and analyzed using the PROC MIXED procedure of SAS. Diagnostic data were analyzed using the Chi-square test using the PROC FREQ procedure of SAS. Pre-weaning mortality was greater (P < 0.05) for the McRebel than the Control treatment in several weeks of…
author: Morris, Jenny Rebekah
language: en
keywords: PRRS, pre-weaning mortality, McRebel
date published: 2018-09-04T20:33:51Z
date modified: 2026-07-22T22:24:38Z
provider: University of Illinois - Urbana-Champaign
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: University of Illinois at Urbana-Champaign

PropertyValue
property ID: Handle
value: http://hdl.handle.net/2142/101122