Animals at Home – Pets as Pests: A Review

[Infections associated with pets]

INTRODUCTION

Domestic pets can transmit numerous infections, including bacterial, parasitic, fungal, and viral diseases. This paper reports the epidemiologic, clinical, therapeutic and prophylactic data of these zoonoses.

CURRENT KNOWLEDGE AND KEY POINTS

The routes of transmission are various. Bites and scratches are the most common health hazards and result in localized infections. Pasteurellosis, various aerobic and anaerobic infections, and cat-scratch disease are predominant. Bites are treated by cleaning the wound, rabies and tetanus prophylaxis, and the appropriate use of antibiotics. Other infections are transmitted through cutaneous, mucous, digestive or respiratory routes, by direct contact with the pets, excreta, or by arthropods. The most common are gastrointestinal (campylobacter, salmonella, yersinia, parasites, etc), dermatologic (dermatophytoses, scabies, cutaneous larva migraines, etc.), respiratory (psittacosis, etc.), and multisystemic (toxoplasmosis, toxocariasis, leishmaniosis). Certain people are at high risk for diverse diseases: small children (toxocariasis, helminthiasis), pregnant women (toxoplasmosis), and immunodeficient patients (cryptosporidiosis, salmonellosis, systemic pasteurellosis). These infectious diseases can be partly prevented by avoiding contact with diseased animals, and by washing the hands following exposure to pets or pet-derived excreta. Specific vaccines for humans and pets, as well as worming pets regularly, form an important part of the prevention. Veterinarians must discourage the keeping of wild or exotic animals as pets.

FUTURE PROSPECTS AND PROJECTS

National health survey institutions and new communication systems can improve our knowledge about the real epidemiology of pet-transmitted zoonoses.

Zoonotic disease concerns in animal-assisted therapy and animal visitation programs

A survey was done of 150 systematically selected United States animal care agencies and 74 Canadian humane societies to determine the prevalence of animal assisted therapy (AAT) programs; concerns about, and experience with, zoonotic diseases; and precautions taken to prevent zoonotic disease transmission. Of the 69 US agencies and 49 Canadian societies that reported having AAT programs, 94% used dogs and/or cats in their programs, 28% used rabbits, 15% used "pocket pets" (hamsters, gerbils, mice, guinea pigs), and 10% used birds (excluding poultry). About two-thirds of the programs were involved with the elderly in nursing homes, about a quarter of them worked with schools, and a quarter worked with hospitals. Half of the respondents had concerns about zoonotic disease control. Rabies, ringworm, and external parasitism were the most commonly cited zoonotic diseases of concern. Few concerns were based on actual experience. Fewer than half of the programs consulted a health professional about prevention of zoonotic diseases. Only 10% of the respondents reported having printed guidelines about the prevention of zoonotic disease transmission. Practising veterinarians are encouraged to make their expertise available to local AAT programs.