Modeling the Spread of Porcine Reproductive and Respiratory Syndrome Among Pig Farms in Lira District of Northern Uganda
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Date
2021
Journal Title
Journal ISSN
Volume Title
Publisher
Frontiers in Veterinary Science
Abstract
Porcine Reproductive and Respiratory Syndrome (PRRS) is a viral swine disease that
causes reproductive failure in breeding sows and respiratory distress in growing pigs.
The main objectives were to simulate the transmission patterns of PRRS in Uganda using
North American Animal Disease Spread Model (NAADSM) and to evaluate the potential
effect of prevention and control options such as vaccination and movement control. The
median number of infectious farms at the end of 52 weeks for the baseline scenario
was 735 (36.75% of the 2,000 farms). The best effects of vaccination were observed
in scenarios 60% farm coverage and 80% farm coverage, which resulted in 82 and
98.2% reduction in the median number of infectious farms at the end of the simulation,
respectively. Vaccination of all medium and large farms only (33% of the farms) resulted
in a 71.2% decrease in the median number of infectious farms at the end of 52 weeks.
Movement control (MC) results showed that the median number of infectious farms at the
end of 52 weeks decreased by 21.6, 52.3, 79.4, and 92.4%for scenariosMC 20,MC 40,
MC 60, and MC 80%, respectively. This study provides new insights to the government
of Uganda on how PRRS can be controlled. The large and medium farms need to be
prioritized for vaccination, which would be a feasible and effective way to limit the spread
of PRRS in Uganda. Scavenging pigs should be confined at all times, whether in the
presence or absence of any disease outbreaks.
Description
Keywords
Simulation model, Porcine reproductive and respiratory syndrome, Uganda, Vaccination, Movement control
Citation
Hasahya E, Thakur KK, Dione MM, Wieland B, Oba P, Kungu J and Lee HS (2021) Modeling the Spread of Porcine Reproductive and Respiratory Syndrome Among Pig Farms in Lira District of Northern Uganda. Front. Vet. Sci. 8:727895. doi: 10.3389/fvets.2021.727895