Analyzing the intrastate and interstate swine movement network in the United States.
Prev Vet Med
; 230: 106264, 2024 Sep.
Article
em En
| MEDLINE
| ID: mdl-39003835
ABSTRACT
Identifying and restricting animal movements is a common approach used to mitigate the spread of diseases between premises in livestock systems. Therefore, it is essential to uncover between-premises movement dynamics, including shipment distances and network-based control strategies. Here, we analyzed three years of between-premises pig movements, which include 197,022 unique animal shipments, 3973 premises, and 391,625,374 pigs shipped across 20â¯U.S. states. We constructed unweighted, directed, temporal networks at 180-day intervals to calculate premises-to-premises movement distances, the size of connected components, network loyalty, and degree distributions, and, based on the out-going contact chains, identified network-based control actions. Our results show that the median distance between premises pig movements was 74.37â¯km, with median intrastate and interstate movements of 52.71â¯km and 328.76â¯km, respectively. On average, 2842 premises were connected via 6705 edges, resulting in a weak giant connected component that included 91â¯% of the premises. The premises-level network exhibited loyalty, with a median of 0.65 (IQR 0.45 - 0.77). Results highlight the effectiveness of node targeting to reduce the risk of disease spread; we demonstrated that targeting 25â¯% of farms with the highest degree or betweenness limited spread to 1.23â¯% and 1.7â¯% of premises, respectively. While there is no complete shipment data for the entire U.S., our multi-state movement analysis demonstrated the value and the needs of such data for enhancing the design and implementation of proactive- disease control tactics.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Doenças dos Suínos
/
Meios de Transporte
/
Criação de Animais Domésticos
Limite:
Animals
País/Região como assunto:
America do norte
Idioma:
En
Revista:
Prev Vet Med
Ano de publicação:
2024
Tipo de documento:
Article
País de publicação:
HOLANDA
/
HOLLAND
/
NETHERLANDS
/
NL
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PAISES BAJOS
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THE NETHERLANDS