Animal diseases can be caused by unicellular micro-organisms (bacteria), leading to infections and toxaemia. The virulence of bacterial animal diseases depends on the degree of immunity of the host. There are four main types of bacteria: the spherical or coccus form; the rod or bacillus type; the spirally twisted spirillum; and a long filamentous type. The extent of the disease is dependent on the ability of the bacteria to multiply in the host. Transmission may be by contagion, inhalation, infection from food, via insects, or via wounds. Bacterial animal diseases include plague, glanders pseudotuberculosis, enteritis, mastitis, pneumonia, infectious anaemia, anthrax, food poisoning, tuberculosis, Johne's disease, meningitis and haemorrhagic septicaemia.
The Encyclopedia of World Problems and Human Potential is a collaboration between UIA and Mankind 2000, started in 1972. It is the result of an ambitious effort to collect and present information on the problems with which humanity is confronted, as well as the challenges such problems pose to concept formation, values and development strategies. Problems included are those identified in international periodicals but especially in the documents of some 60,000 international non-profit organizations, profiled in the Yearbook of International Organizations.
The Encyclopedia includes problems which such groups choose to perceive and act upon, whether or not their existence is denied by others claiming greater expertise. Indeed such claims and counter-claims figure in many of the problem descriptions in order to reflect the often paralyzing dynamics of international debate. In the light of the interdependence demonstrated among world problems in every sector, emphasis is placed on the need for approaches which are sufficiently complex to encompass the factions, conflicts and rival worldviews that undermine collective initiative towards a promising future.
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