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PubMed1978

The zoonosis-prone veterinarian.

A study of 1,182 Illinois veterinarians revealed that 833 had experienced an accident, and of these 833, 42.7% also had experienced a zoonosis. Brucellosis and animal bites were especially prevalent zoonoses. This percentage differed significantly (P less than 0.01) from the 32.4% of 349 accident-free veterinarians who had experienced zoonoses. The prevalence of zoonoses was even higher (50%) among veterinarians with a history of 3 or more accidents. The prevalence of 16 nonzoonotic health conditions was similar in veterinarians who had experienced an accident and in the total veterinary population, demonstrating a degree of specificity to the accident-zoonosis association. Of the subjects studied, 5.7% had experienced 16.5% of the events, accidents or zoonoses. The subgroup that had experienced 5 or more events and the subgroup that experienced no events differed in many characteristics from the total veterinary population. The biological importance of the characteristics of these veterinarians remains to be determined. The hypothesis was advanced that zoonoses can be considered occupational accidents in veterinarians and that certain veterinarians are zoonosis prone. If true, this hypothesis also might apply to certain communicable diseases in the general human population.

Accident Proneness↗
PubMed2004

[Zoonotic infections in humans. Review of the epidemiological situation in Germany].

Zoonoses are infectious diseases that can be transmitted from vertebrate animals to humans. Their significance lies in the large number of cases that occur, the high case fatality ratio of certain zoonoses, and the potential for some pathogens as yet restricted to animal hosts to cross the species barrier and infect humans. Changing habits in food production (for example, intensive animal husbandry) and food consumption as well as demographic, climatic, and ecological factors contribute to the spread of zoonotic pathogens. Several zoonoses are notifiable in Germany according to the Protection Against Infection Act enacted 1 January 2001. The European Commission issued a new directive on the monitoring of zoonoses and zoonotic agents on 17 November 2003. There is ongoing need to develop further measures to prevent and control zoonotic diseases on a national as well as international basis.

Communicable Disease Control↗
PubMed1989

Current problems in zoonosis research.

New developments in the field of Zoonosis research are discussed. They include: 1. New emerging viral zoonosis 2. Multicausal zoonoses 3. Genetic aspects of the origin of new zoonoses 4. Transmission of zoonoses to man through foodstuffs of animal origin 5. The environment and zoonoses. Continuous zoonosis research with new molecular biological techniques is a necessity. In the final analysis, there are no true limits in the field of infectiology. Such research requires cooperation between ecologists, zoologists, botanists, molecular biologists, physicians and veterinarians.

Animals↗
PubMed1992

Organisation of veterinary public health activities in countries of the Eastern Mediterranean region.

This review covers the organisation of veterinary public health (VPH) activities in countries of the Eastern Mediterranean region, with reference to zoonoses and hazards to man from foods of animal origin. A study of the region shows that no separate VPH units exist within the national Veterinary Services. Although these Services are gradually being upgraded and strengthened, most of their resources are spent in controlling serious contagious animal diseases such as foot and mouth disease, rinderpest and Newcastle disease. Rabies, present in almost every country of the region, is a zoonosis which no Veterinary Service can ignore. Other serious zoonoses affecting the region include echinococcosis, brucellosis, leishmaniasis, anthrax, toxoplasmosis and tuberculosis. Salmonellosis is one of the most serious food-borne zoonoses, while hazards from the increased presence of additives, pesticides, antibiotics and hormones in foods of animal origin are other emerging VPH problems. Many obstacles hamper efficient reorganisation of VPH activities. These include the inherited colonial system of assigning VPH activities to other authorities (health inspectors) rather than to Veterinary Services; the confusion as to which authority should actually be responsible in a given field; the lack of epidemiological studies and knowledge of the real extent of VPH problems; lack of training; inadequately staffed and poorly equipped Veterinary Services; and lack of public awareness. Nonetheless, a few countries have made excellent progress in reorganising VPH activities and in eradicating serious zoonoses. International organisations like the OIE, FAO and WHO can help greatly in establishing efficient VPH programmes.

Africa, Northern↗
PubMed2004

Wildlife as source of zoonotic infections.

Zoonoses with a wildlife reservoir represent a major public health problem, affecting all continents. Hundreds of pathogens and many different transmission modes are involved, and many factors influence the epidemiology of the various zoonoses. The importance and recognition of wildlife as a reservoir of zoonoses are increasing. Cost-effective prevention and control of these zoonoses necessitate an interdisciplinary and holistic approach and international cooperation. Surveillance, laboratory capability, research, training and education, and communication are key elements.

Animals↗
PubMed1985

Zoonotic disease of occupational significance in agriculture: a review.

This manuscript presents an overview of occupational zoonotic diseases of agricultural workers (agricultural zoonoses). The primary intended use of this manuscript is to provide an educational frame work for public health officials in countries where there is a concern to establish or modify agricultural zoonoses control programs. The material is presented in two parts: 1) general concepts, (including definitions, classifications and ecological concepts), and 2) a description of selected agricultural zoonotic diseases. The general concepts and definitions, presented here in narrative form, are common to all agricultural zoonoses, regardless of geographical location. The specific facts for the individual diseases are presented in a tabular format. The tables present the essential features of 40 of the most important agricultural zoonoses, from a worldwide perspective. An extensive reference list is included so the reader may supplement this manuscript with additional readings.

Agricultural Workers' Diseases↗
PubMed2004

New partnerships between animal health services and public health agencies.

As Veterinary Services and animal health organisations attempt to respond to a new era of emerging and re-emerging zoonotic diseases, their ability and skill in forming new strategic partnerships will be paramount. While these new partnerships are likely to include many relationships outside traditional Veterinary Services and animal agriculture, none will become more important than the formation of new animal health and public health partnerships. Episodes of emerging zoonoses are being increasingly recognised around the world and the confluence of people, animals and animal products today is unprecedented. Concurrently, a wide array of complex factors are also converging that will not only ensure the continuous emergence of zoonoses, but are also likely to drive the further increase and expansion of these diseases. This article discusses the need for the creation of more effective and co-operative partnerships in the face of new microbial threats, the complexity of both the formation and expansion of zoonoses, and the collective abilities of both human and animal health services to respond to them. Lessons learned from recent zoonotic epidemics supportthe need for co-ordinated research, interdisciplinary centres, integrated surveillance systems, response systems and infrastructures, and workforce development strategies. While there are some excellent examples of collaborative animal and public health relationships, there is no question that more and stronger partnerships among national and international organisations, both academic and private, will be necessary to meet the future challenges of emerging zoonoses and to manage their profound implications.

Animals↗
PubMed2002

Zoonotic infections in travelers to the tropics.

Infections that normally occur in animal hosts, zoonoses are transmitted occasionally between animals and humans. Zoonoses occur worldwide, and the traveler may engage in activities increasing the risk of acquiring these otherwise rare infections. This article reviews selected zoonoses in the context of travel to the tropics.

Animals↗
PubMed2002

[Arboviruses and epizootic viruses].

Some viral diseases are transmitted to human by arthropods (arboviroses), or by animals (zoonoses). Among more than 500 arboviruses and epizootic viruses that are classified into seven families, only a few are responsible for zoonoses or cause severe human diseases. Infected patients may show an acute disease associated with different symptoms, ranging from high fever to encephalitis, pulmonary distress, and haemorrhages. Some diseases show one or more of these symptoms and the factors responsible for severe outcomes, either linked to the virus, or to the host, or to the vector, remain poorly understood. Arboviroses and zoonoses are emerging or re-emerging diseases that need a multidisciplinary effort to control the propagation of the infectious agent and the pathogenesis in infected patients. Some viruses could be used for bioterrorism attacks. In virology, studies on the interactions of the viruses with their vectors and vertebrate hosts and on the pathophysiology of the infections will allow a better prevention of these diseases.

Animals↗
PubMed2006

Where do pets fit into human quarantines?

Currently, there are over 400 viral zoonoses in the world. In addition, there are numerous bacterial zoonoses. Of the emerging diseases, <75% are zoonoses. The potential for household transmission through pets is now being considered in any new disease when information is incomplete regarding potential hosts, and the risk for interspecies transmission is unknown. The possible role of household pets in disease transmission in community-based quarantines has previously been overlooked.

Animals↗
PubMed2004

Zoonotic poxvirus infections in humans.

PURPOSE OF REVIEW: The 2003 USA monkeypox epidemic caused by imported African rodents, newly emergent poxvirus zoonoses in Brazil and the possible use of variola virus for biological warfare has led to renewed interest in poxviruses and anti-poxviral therapies. Increasing foreign travel and importation of exotic animal species increases the likelihood of poxvirus infections occurring outside their usual geographical range and diagnostic delay has important implications. The present review provides an overview of these rare zoonoses. RECENT FINDINGS: Three genera of Poxviridae are known to cause human zoonoses: orthopoxviruses, parapoxviruses and yatapoxvirus. Most cases are occupational, sporadic and have few cutaneous lesions with low morbidity. The exception is monkeypox, similar to smallpox, with significant morbidity and childhood mortality. Molecular characterization using polymerase chain reaction (PCR) amplification and other methods provides accurate phylogenetic identification and suggests that a cowpox-like virus is the probable ancestor of variola and other zoonotic poxviruses. DNA genomic sequencing of the Brazilian Cantagalo and Araçatuba viruses shows a close relationship to vaccinia virus. Poxviruses have potential in cancer immunotherapy and their ability to evade host-cell immune responses may provide a basis for new antipoxvirus therapies. Other agents, particularly nucleoside phosphonates such as cidofovir, show therapeutic action against poxviruses. SUMMARY: Human zoonotic poxvirus infections are rare but increasingly encountered outside their usual geographical range. The 2003 USA monkeypox outbreak emphasizes the importance of early accurate diagnosis, particularly because increasing numbers of immunosuppressed individuals increases the potential for severe or fatal infections. PCR methodology enables accurate phylogenetic typing and has identified new diseases, but rapid, reliable methods must be made available for clinicians. More research into therapeutic agents for the prevention and treatment of poxvirus infections is required.

Animals↗
PubMed2001

The Leeuwenhoek Lecture 2001. Animal origins of human infectious disease.

Since time immemorial animals have been a major source of human infectious disease. Certain infections like rabies are recognized as zoonoses caused in each case by direct animal-to-human transmission. Others like measles became independently sustained with the human population so that the causative virus has diverged from its animal progenitor. Recent examples of direct zoonoses are variant Creutzfeldt-Jakob disease arising from bovine spongiform encephalopathy, and the H5N1 avian influenza outbreak in Hong Kong. Epidemics of recent animal origin are the 1918-1919 influenza pandemic, and acquired immune deficiency syndrome caused by human immunodeficiency virus (HIV). Some retroviruses jump into and out of the chromosomal DNA of the host germline, so that they oscillate between being inherited Mendelian traits or infectious agents in different species. Will new procedures like animal-to-human transplants unleash further infections? Do microbes become more virulent upon cross-species transfer? Are animal microbes a threat as biological weapons? Will the vast reservoir of immunodeficient hosts due to the HIV pandemic provide conditions permissive for sporadic zoonoses to take off as human-to-human transmissible diseases? Do human infections now pose a threat to endangered primates? These questions are addressed in this lecture.

Animals↗
PubMed2001

Role of veterinary medicine in public health: antibiotic use in food animals and humans and the effect on evolution of antibacterial resistance.

Veterinary public health is another frontier in the fight against human disease. The veterinary public health scope includes the control and eradication of zoonoses, diseases that are naturally transmitted between vertebrate animals and man. These diseases pose a continuous hazard to the health and welfare of the public. More than 100 diseases are categorized as zoonoses, including salmonellosis. It is important to understand how antibiotics are used in humans and in food animals and how these uses affect the evolution of antibacterial resistance. Appropriate use of antibiotics for food animals will preserve the long-term efficacy of existing antibiotics, support animal health and welfare, and limit the risk of transfer of antibiotic resistance to humans. An understanding of the epidemiology of antimicrobial resistance allows development of preventive strategies to limit existing resistance and to avoid emergence of new strains of resistant bacteria. Risk assessments are being used by the Center for Veterinary Medicine at the U.S. Food and Drug Administration as regulatory tools to assess potential risk to humans resulting from antibiotic use in food-producing animals and to then develop microbial safety policies to protect the public health. The veterinary public health scope, in addition to the control and eradication of zoonoses, also includes the development and supervision of food hygiene practices, laboratory and research activities, and education of the public. Thus, it may be seen that there are many ways in which veterinary medicine plays a very important role in public health.

Animals↗
PubMed1991

History of veterinary public health in the Eastern Mediterranean and Africa.

Brucellosis, rabies, salmonellosis, anthrax and hydatidosis are among the main zoonotic diseases which constitute a threat to human health and welfare. Surveillance, prevention and control of such zoonoses and related food-borne diseases are problems of considerable magnitude. Despite their obvious importance, relatively few systematic control efforts have been made by national authorities. Major constraints include the scarcity of public health veterinarians and related sub-professional staff to plan and implement adequate surveillance and control of zoonoses, and the lack of appropriate legislation and adequate laboratory services. Veterinarians have been contributing to public health for many years, but despite considerable efforts by the World Health Organisation (WHO), the Food and Agriculture Organisation of the United Nations (FAO) and other organisations in establishing veterinary public health (VPH) programmes over several decades, the veterinarian as a career specialist in public health is a relatively new phenomenon. In the last decade, emphasis has been placed on: --supporting the training and development of human resources to promote VPH services and cover all its components --promoting and upgrading national epidemiological surveillance and control programmes for the major zoonotic and food-borne diseases --cooperating and assisting in local production of safe and effective vaccines, primarily for the control of rabies and brucellosis. The most encouraging aspects of the present situation is the growing awareness among governments of the need to develop programmes for the control of zoonoses and related food-borne diseases.

Africa↗
PubMed1992

Organisation of veterinary public health in Africa.

Veterinary public health (VPH) is not integrated into the mainstream of public health services in Africa. There are no formal mechanisms within government public health services through which veterinary skills and resources can be effectively harnessed to bear upon community health. There is no conscious, overt or substantial effort by public authorities to incorporate VPH services in the overall approach to public health. VPH activities cover mainly the control of the major animal diseases transmissible to man (zoonoses), meat inspection and, to a limited degree, the quality control of milk, fish and their products. These services are carried out by the Veterinary Services of the Ministry of Agriculture in each country. Concerning education, only 7 of the 28 schools of veterinary medicine in Africa have separate departments where VPH subjects such as epidemiology, food hygiene, zoonoses, biostatistics, community health, public administration, preventive medicine and other related fields are taught by public health-trained and oriented staff. Elsewhere the teaching of VPH subjects is delegated to staff whose foremost interests are in pathology, microbiology and clinical medicine. Postgraduate training in VPH is fast developing in the veterinary schools of Nigeria, Kenya and Uganda. Political instability, war, famine and poverty which deplete human and material resources, lack of intersectorial cooperation in matters of public health and lack of vigour on the part of the veterinary profession as a whole to assert its broader role in the community also contribute to the poor organisation of VPH in Africa. International collaboration in VPH is spearheaded by the Food and Agriculture Organisation (FAO) and the World Health Organisation (WHO). These agencies, along with the Office International des Epizooties (OIE) and other international organisations or groups, are active in promoting the development of VPH programmes by setting guidelines on the organisation and management of VPH, coordinating control programmes for the major zoonoses and providing financial and technical expertise.

Africa↗
PubMed1999

Healthy pets, healthy people.

Zoonoses, diseases that can be transmitted from animals to humans, can pose serious health risks to immunocompromised people. Although pets can carry zoonoses, owning and caring for animals can benefit human health. Information exists about preventing transmission of zoonoses, but not all physicians and veterinarians provide adequate and accurate information to immunocompromised pet owners. This disease prevention/health promotion project provides physicians and veterinarians with information, created specifically to share with patients and clients, about the health risks and benefits of pet ownership. Further, "Healthy Pets, Healthy People" encourages communication between veterinarians, physicians, clients, and patients and can serve as a model program for a nation-wide effort to aid health professionals in making recommendations about pet ownership for immunocompromised people.

Animals↗
PubMed2000

Fifty years of veterinary public health activities in the Eastern Mediterranean Region.

This paper reviews the activities in veterinary public health in the Eastern Mediterranean Region over the past 50 years. It outlines the training and research carried out in the Region, with reference to the High Institute of Public Health in Alexandria and the Mediterranean Zoonoses Control Centre in Athens. It gives an overview of the activities carried out by the World Health Organization for the control of the different zoonoses prevalent in the Region and also looks at emerging and re-emerging zoonoses.

Academies and Institutes↗
PubMed1985

[Vaccination of animals and human health].

Prophylactic immunization of animals against obligat and nonobligat pathogenic zoonoses benefit human health in many ways both directly and indirectly. Typical examples of a direct protective effect are the vaccinations of dogs, cats and foxes against rabies as well as the vaccinations against respiratory diseases in cows, horses, dogs and cats to which the most varied species of pathogens of noncompulsory zoonoses contribute. A considerable contribution to the protection of human health is made by the vaccination against salmonellosis and leptospirosis, against vesicular stomatitis, American equine encephalitis and against other zoonoses spread by arthropods, against ecthyma and stomatitis papulosa as well as against brucellosis, anthrax, Q-fever, Newcastle disease and foot-and-mouth disease. The indirect effects of prophylactic vaccination of animals on human health are very complex and still need investigation. An example of this are the vaccinations of animals against human and animal influenza A viruses which can inhibit hybridisation and recombination between human and animal influenza viruses in an ecological system. Occasionally prophylactic vaccinations of animals can do harm to human health. This is invariably a rare incidence in immuno-suppressed persons caused by live vaccines i.e. prophylactic vaccination against Newcastle disease in fowl or against orthopox in animals by the use of the common vaccinia strains, after compulsory vaccination for humans had been cancelled. Prophylactic vaccinations of animals must be constantly followed up and their action on human health must be checked. In the case of positive results prophylactic vaccinations must be carried out selectively and in a wide range.

Animals↗