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On November 2 a low-pathogenic H5N2 strain of bird flu was confirmed at Chookies Farm and Feed Store in Kent.
As a result, all 480 birds (including swans, pigeons, chickens and ducks) are to be culled to limit the spread of the disease.
On November 3, an unrelated outbreak, caused by H5N8, was reported at a farm which rears broiler breeder chickens in Cheshire.
Testing has confirmed it is the highly pathogenic strain circulating in Europe. H5N8 can cause serious disease in poultry and other birds and therefore all 13,500 birds at this farm will be culled.
The reason all birds are killed on infected farms is to prevent infection spreading to other farms. The highly pathogenic H5N1, for example, was first reported in 1996. It was found in commercially farmed geese in the Guandong Province of China.
H5N1 is now prevalent in poultry across Asia and Africa. As a result, it’s caused more than 15,000 outbreaks in domestic birds (raised for eggs and meat).
More than 240 million poultry – including chickens, ducks, turkeys and geese – have either died from the infection or been slaughtered in an effort to stop it spreading.
The global spread of this highly pathogenic strain in birds is considered to be a significant pandemic threat.
Since 2003, 861 confirmed human cases and 455 deaths due to H5N1 have been reported to the World Health Organisation, from 16 countries (not the UK). So, although human infection rates with this virus are relatively low, approximately 60 per cent of those infected have died.
The vast majority of human infections with H5N1 have resulted from direct contact with poultry, with just a very small handful of person-to-person cases spread among those caring for relatives.
However, flu viruses constantly change, which is why a new vaccine is developed every year for seasonal flu.
It would be an extremely serious cause for concern if the H5N1 virus mutated and became more easily transmissible between people, like COVID-19 for example.
David Nabarro is one of the most senior public health experts at the World Health Organisation. He said the ‘range of deaths could be anything between five and 150 million’.
Factory farms are the perfect place for mutating viruses to thrive. They are overcrowded, filthy places. Moreover, they are packed with stressed animals with low immunity due to being bred for rapid growth.
Basically, if you wanted to create an ideal environment for a new virus to emerge, you would be hard-pushed to beat an intensive poultry or pig farm.
Authorities have put temporary control zones in place around the infected premises in Kent and Cheshire. They will also send alerts out to people who keep birds.
Dr Gavin Dabrera is consultant in Acute Respiratory Infections at PHE (Public Health England). He said: “Avian influenza remains an uncommon infection in humans and the risk to the UK population remains very low.
“We will continue working with Defra and the local Health Protection Team to monitor the situation closely. Do not touch any sick or dead birds. And also make sure to wash your hands thoroughly with soap after contact with any animal.”
The government is clearly concerned. In any event, scientists have been warning about the human health risks posed by intensive animal farming units for years.
Most people thought poultry or pig farming would create the flu virus to cause the next pandemic. This is following the 2009 swine flu pandemic which originated in a pig farm in Mexico.
The best way to combat the risk of further pandemics caused by an avian flu virus is to go vegan. And also to end factory farming.
Find out more about the links between factory farming and zoonotic diseases here
This article was first published by Viva!