Analysis of spatial and temporal clustering of horses with Salmonella krefeld in an intensive care unit of a veterinary hospital

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Abstract

Objective - To determine whether clustering existed in the spatial or temporal distribution of horses that shed Salmonella krefeld in their feces during hospitalization. Design - Retrospective analysis of medical records. Animals - 219 horses housed in the intensive care unit of a veterinary medical teaching hospital from October 1991 through May 1992. Procedure - Bacteriologic culturing of fecal samples was used to identify horses shedding S krefeld. For affected horses, the scan statistic was used to analyze temporal clustering, and Knox's method was used to analyze temporal-spatial clustering. Results - 20 horses were identified as shedding S krefeld in their feces. Significant temporal clustering of affected horses was observed for periods of 5, 6, 7, and 8 days. Temporal-spatial analysis did not detect a significant distribution for any combination of time and distance among affected horses. Clinical Implications - Detection of temporal clustering and concurrent random temporal-spatial distribution of affected horses suggested that affected horses were grouped in time, but means of transmission was not related to proximity between horses.

Original languageEnglish (US)
Pages (from-to)626-628
Number of pages3
JournalJournal of the American Veterinary Medical Association
Volume209
Issue number3
StatePublished - Aug 1 1996

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Spatio-Temporal Analysis
Animal Hospitals
veterinary clinics
Salmonella
Horses
Intensive Care Units
Cluster Analysis
horses
Feces
feces
Teaching Hospitals
Medical Records
Hospitalization
statistics
spatial distribution

ASJC Scopus subject areas

  • veterinary(all)

Cite this

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title = "Analysis of spatial and temporal clustering of horses with Salmonella krefeld in an intensive care unit of a veterinary hospital",
abstract = "Objective - To determine whether clustering existed in the spatial or temporal distribution of horses that shed Salmonella krefeld in their feces during hospitalization. Design - Retrospective analysis of medical records. Animals - 219 horses housed in the intensive care unit of a veterinary medical teaching hospital from October 1991 through May 1992. Procedure - Bacteriologic culturing of fecal samples was used to identify horses shedding S krefeld. For affected horses, the scan statistic was used to analyze temporal clustering, and Knox's method was used to analyze temporal-spatial clustering. Results - 20 horses were identified as shedding S krefeld in their feces. Significant temporal clustering of affected horses was observed for periods of 5, 6, 7, and 8 days. Temporal-spatial analysis did not detect a significant distribution for any combination of time and distance among affected horses. Clinical Implications - Detection of temporal clustering and concurrent random temporal-spatial distribution of affected horses suggested that affected horses were grouped in time, but means of transmission was not related to proximity between horses.",
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N2 - Objective - To determine whether clustering existed in the spatial or temporal distribution of horses that shed Salmonella krefeld in their feces during hospitalization. Design - Retrospective analysis of medical records. Animals - 219 horses housed in the intensive care unit of a veterinary medical teaching hospital from October 1991 through May 1992. Procedure - Bacteriologic culturing of fecal samples was used to identify horses shedding S krefeld. For affected horses, the scan statistic was used to analyze temporal clustering, and Knox's method was used to analyze temporal-spatial clustering. Results - 20 horses were identified as shedding S krefeld in their feces. Significant temporal clustering of affected horses was observed for periods of 5, 6, 7, and 8 days. Temporal-spatial analysis did not detect a significant distribution for any combination of time and distance among affected horses. Clinical Implications - Detection of temporal clustering and concurrent random temporal-spatial distribution of affected horses suggested that affected horses were grouped in time, but means of transmission was not related to proximity between horses.

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