Animal diseases spreading to humans are responsible for 16 per cent of infectious diseases in less-industrialised countries
Asian factory farming boom spreading animal diseases like avian influenza
11th February, 2011
Increasing density of livestock production and poor biosecurity in Asia is encouraging epidemics, with a new disease emerging every four months, says new International Livestock Research Institute (ILRI) report
Less industrialised countries, particularly in Asia, are struggling to cope with the disease outbreaks associated with the rapid intensification of meat production, according to new research.
Animal diseases spreading to humans are responsible for 16 per cent of infectious diseases in less-industrialised countries. However, researchers from the International Livestock Research Institute (ILRI) said the obsession with increasing meat production and profit was 'largely ignoring' the spread of animal diseases to humans.
The speed of intensification in many countries could not be matched by improvements in management, hygiene and veterinary capacity, said John McDermott, who led the ILRI research.
'Wealthy countries are effectively dealing with livestock diseases, but in Africa and Asia, the capacity of veterinary services to track and control outbreaks is lagging dangerously behind livestock intensification. This lack of capacity is particularly dangerous because many poor people in the world still rely on farm animals to feed their families, while rising demand for meat, milk and eggs among urban consumers in the developing world is fueling a rapid intensification of livestock production,' he said.
The spread and subsequent establishment of avian influenza (AI) in previously disease-free countries, such as Indonesia, was a classic example, the researchers say, of the risks posed by high-density chicken and duck operations as well as the rapid global movement of both people and livestock. In addition, large-scale irrigation designed to boost agricultural productivity, they say, has created conditions that facilitate the establishment of diseases such as the Rift Valley fever virus in new regions, with occasional outbreaks killing hundreds of people along with thousands of animals.
According to reaseachers, 61 percent of all human pathogens, and 75 per cent of new human pathogens, are transmitted by animals, and some of the most lethal bugs affecting humans originate in our domesticated animals. 'A new disease emerges every four months; many are trivial, but HIV, SARS, and Avian influenza illustrate the huge potential impacts,' said McDermott.
The researchers say less industrialised countries need to improve their monitoring and veterinary capacity to stop or contain livestock epidemics before the become widespread. They estimated the potential cost of a human pandemic from avian influenza, for example, could be US$3 trillion.
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