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  • Author or Editor: Emilio E. DeBess x
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OBJECTIVE To characterize the demographics, exposure risks, and outcomes for dogs with leptospirosis in Oregon between 2007 and 2011 and to identify geographic and temporal distributions of known cases of canine leptospirosis within the state during this period.

DESIGN Retrospective descriptive epidemiological study.

ANIMALS 72 dogs.

PROCEDURES Reports of laboratory tests for leptospirosis and zoonosis reporting forms voluntarily submitted by veterinarians to the Oregon Health Authority were evaluated to identify dogs with leptospirosis during the study period; data were also collected by examination of medical records or by telephone surveys with veterinarians from reporting facilities.

RESULTS 72 confirmed cases of leptospirosis were identified; surveys were completed for 65 cases. Seasonal and spatial distributions coincided with rainfall patterns for the state, with most cases diagnosed in the spring and in the western part of the state. Common exposure risks included contact with water in the environment (14/65) and contact with wildlife (14); 33 dogs had no history of known exposure risks. Among dogs with other conditions at the time of diagnosis (26/64), dermatitis, otitis, or both were the most commonly reported findings (9/26). Of 65 dogs, 44 recovered, 12 died or were euthanized because of leptospirosis, and 9 were lost to follow-up.

CONCLUSIONS AND CLINICAL RELEVANCE Distribution of canine leptospirosis cases in Oregon fit the rainfall theory pattern. Dermatologic conditions were present in 9 of 64 (14%) dogs that had a diagnosis of leptospirosis; however, further investigation is needed to determine whether such conditions predispose dogs to the disease.

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in Journal of the American Veterinary Medical Association


Objective—To identify physical traits of biting dogs and characteristics of injured persons and dog owners associated with bite situations for use in public health prevention activities.

Design—Retrospective cohort study.

Study Population—Licensed dog and dog bite report data from June 30, 2002, to July 1, 2003, that were obtained from Animal Control Services of Multnomah County, Oregon.

Procedures—To determine the canine and human factors associated with dog bite injuries, the number of bites, dog and injured person characteristics, and the overall canine population were evaluated. Dog owner characteristics at the block group level were defined by use of geographic information system software through 2000 census information based on place of residence.

Results—During the study period, 636 dog bites were reported to Animal Control Services, and 47,526 dogs were licensed in Multnomah County. Risk factors associated with biting dogs included breed (terrier, working, herding, and nonsporting breeds), being a sexually intact male, and purebred status. Male children aged 5 to 9 years had the highest rate of injury (178 bites/100,000 children). Biting dogs were more likely than nonbiting dogs to live in neighborhoods where the residents' median incomes were less than the county median income value ($41,278).

Conclusions and Clinical Relevance—Dog bites continue to be a source of preventable injury. Prevention programs should target owners of sexually intact male and purebred dogs and owners who live in lower income neighborhoods.

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in Journal of the American Veterinary Medical Association
in Journal of the American Veterinary Medical Association