• Publications
  • Influence
Detailed postmortem examination of southern sea otters (Enhydra lutris nereis) found along the California (USA) coast has provided an exceptional opportunity to understand factors influencingExpand
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  • Open Access
Spatial analytical methods and geographic information systems: use in health research and epidemiology.
Person, place, time: these are the basic elements of outbreak investigations and epidemiology. Historically, however, the focus in epidemiologic research has been on person and time, with littleExpand
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Prevalence and control of foot-pad dermatitis in broilers in Sweden.
1. A cross-sectional observational study was carried out to investigate spatial, temporal and management aspects of foot-pad dermatitis in Swedish broilers. The efficacy of a control programme wasExpand
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Economic impact of Mycoplasma gallisepticum and M. synoviae in commercial layer flocks.
An egg-production function was constructed, using data collected from 366 commercial layer flocks in California, to predict the impact of Mycoplasma gallisepticum (MG) and M. synoviae (MS) on eggExpand
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Vaccination with F-strain Mycoplasma gallisepticum to reduce production losses in layer chickens.
The effect of Mycoplasma gallisepticum (MG) infection or vaccination of Conn. F-strain MG on 45 weeks of egg production was analyzed using production records from 132 flocks of commercial layer hens.Expand
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Results of epidemic simulation modeling to evaluate strategies to control an outbreak of foot-and-mouth disease.
OBJECTIVE To assess estimated effectiveness of control and eradication procedures for foot-and-mouth disease (FMD) in a region of California. SAMPLE POPULATION 2,238 herds and 5 sale yards inExpand
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Epidemiologic investigation of the re-emergence of infectious salmon anemia virus in Chile.
Reports from surveillance activities were analyzed to determine the epidemiology of the re-emergence of infectious salmon anemia virus (ISAV) in Atlantic salmon farms in Chile. The epidemic andExpand
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  • Open Access
Direct and indirect contact rates among beef, dairy, goat, sheep, and swine herds in three California counties, with reference to control of potential foot-and-mouth disease transmission.
OBJECTIVE To estimate direct and indirect contact rates on livestock facilities and distance traveled between herd contacts. SAMPLE POPULATION 320 beef, dairy, goat, sheep, and swine herds, 7Expand
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Description of an epidemic simulation model for use in evaluating strategies to control an outbreak of foot-and-mouth disease.
OBJECTIVE To develop a spatial epidemic model to simulate intraherd and interherd transmission of foot-and-mouth disease (FMD) virus. SAMPLE POPULATION 2,238 herds, representing beef, dairy, swine,Expand
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Epidemic and Economic Impacts of Delayed Detection of Foot-And-Mouth Disease: A Case Study of a Simulated Outbreak in California
The epidemic and economic impacts of Foot-and-mouth disease virus (FMDV) spread and control were examined by using epidemic simulation and economic (epinomic) optimization models. The simulated indexExpand
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  • Open Access