Millions of us own pets and they are often considered as family members. The human–animal bond has many different forms of relationships, including companionship, protection, and service. However, such interactions are not always benign or without adverse consequence. The problems related to pet animal keeping includes allergies, bites and various diseases. Most diseases are species specific. The majority of diseases pose no threat to humans and can be treated. A few are more dangerous to those with poor immune systems and a very small minority are unquestionably dangerous e.g. rabies. Zoonoses are diseases that can be passed naturally from animals to man. As such zoonoses are worldwide and often spread with human through their companion and domestic animals. Most zoonotic diseases can be avoided through good hygiene – disinfecting areas which have become contaminated, washing hands after handling contaminated items and weå rubber gloves to prevent infectious matter entering skin wounds. Routine veterinary care, including fecal tests, blood tests, and vaccinations, are very important and should not be ignored. In this book we are going to deal about the important diseases transmitted through pet animals to human beings.