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Dogs, zoonoses and immunosuppression

Pre-clinical Affairs, College of Veterinary Medicine, Western University of Health Sciences, Pomona, California 91766-1854, USA, ashleyrobinson{at}hotmail.com

R N Pugh

Directorate of Public Health Medicine, Walsall Health Authority, Walsall WS1 1TE, England

Dogs are the source of a wide range of zoonotic infections that pose a significant threat to human health. This is particularly the case for immuno-compromised people, although there are few robust studies that determine immunosuppression as a risk factor for transmission of zoonoses from dogs to humans. An increasing proportion of human society is immunodeficient, principally through the advent of HIV infection and through more people, particularly the expanding elderly group, being subjected to immunosuppressive agents. This is happening at a time when more such people are capitalising on the acknowledged benefits of dog ownership, making for a potentially dangerous mix. Enteric pathogens (for example, Salmonella, Campylobacter and Cryptosporidium species, that may be canine derived) are a frequent risk to the health of immunocompromised persons.

Veterinarians and physicians can be criticised for not communicating with each other, and for not providing adequate risk assessment to pet owners. There is scope for voluntary groups to provide information and support for the immunosup-pressed who wish to keep their dogs. Key recommendations are to maintain a clean personal environment and intact mucocutaneous barriers. Public health professionals could help rectify the current communications gap between veterinary and medical staff and so facilitate in the appropriate management of dog-owning immunocompromised people.

Key Words: Dogs • immunosuppression • risk assessment • zoonosis

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