Integration and validation of a radio frequency identification (RFID) system and automatic sorting technology (AST) for real-time correlation of management and disease impacts on the performance of swine in field studies
Date of Award
Master of Science
Veterinary Diagnostic and Production Animal Medicine
Locke A. Karriker
Jeffrey J. Zimmerman
A cohort study using RFID system with automatic sorting scales to monitor weights of swine finishers was conducted. Weight data from 2,057 barn-raised pigs were monitored to assess tag retention, frequency of scale visits, data capture, and outlier detection. Results showed tag loss rate highest around 12th and 13th week of finishing; crowded pens more likely to lose tags; and pen-averaged daily scale visits ranged from 2.45-2.74 visits. Using a system that removes outliers and inaccurate weights, weight data from 100 randomly selected swine finishers in four time-points were evaluated. Sample pigs were bled monthly for three months, tested for PRRS virus infection using ELISA and RT-PCR, and grouped based on test results. Repeated measures analysis revealed significant interaction between group and time (P=0.014). The group (2 head) with the largest mean final weight (224.38 +/- 14.79) was negative in both tests while the group (28 head) with the lowest mean final weight 207.56 +/- 4.29 was positive in either test for three time-points.
Digital Repository @ Iowa State University, http://lib.dr.iastate.edu/
Ruby Herseniada Destajo
Destajo, Ruby Herseniada, "Integration and validation of a radio frequency identification (RFID) system and automatic sorting technology (AST) for real-time correlation of management and disease impacts on the performance of swine in field studies" (2007). Retrospective Theses and Dissertations. 14525.