Nine species of vulture can be found living in India, but most are now in danger of extinction after a rapid and major population collapse in recent decades.
[4] Data modelling revealed that a tiny proportion (about 0.8%) of livestock carcasses containing diclofenac can cause significant crash in vulture populations.
[5] Without vultures, a large number of animal carcasses were left to rot, posing a serious risk to human health by providing a potential breeding ground for infectious germs and proliferation of pests such as rats.
[6] The loss of vultures also resulted in a substantial increase in the population of feral dogs, whose bites are the most common cause of human rabies.
[10] The population is recovering slowly and the decline has been significantly arrested in India, Pakistan and Nepal following a strict ban on the drugs causing harm to the vultures.
[23] Diclofenac is a common anti-inflammatory drug administered to livestock and is used to treat the symptoms of inflammation, fevers and/or pain associated with disease or wounds.
[29] The sudden collapse of the natural animal disposal system in India has had multiple consequences negatively impacting public health.
[31] Without vultures, a large number of animal carcasses were left to rot posing a serious risk to human health by providing a potential breeding ground for infectious germs and proliferation of pests such as rats.
The loss of vultures also resulted in a substantial increase in the population of feral dogs, whose bites are the most common cause of human rabies.
Due to the decline in vulture population, they have been forced to drop these ancient customs for reasons of hygiene, since now bodies take six months to disappear.
[35] Following the findings on diclofenac, the drug was banned for veterinary use in India on March 11, 2006; Nepal followed suit in August and Pakistan in October.
[9] Pharmaceutical companies were encouraged to the increase in the production of meloxicam aimed at reducing the cost down to diclofenac's own levels to make it more suitable for use.
[42] New sanitary regulation laws regarding animal carcass disposal in Spain also reduce the amount of available food for vultures while adding to costs and greenhouse gas emissions.
[48] Three more breeding centers have been set up in the Indian states of West Bengal, Assam and Madhya Pradesh in addition to four smaller facilities in collaboration with zoos.
It aims to step up conservation measures and set up a mechanism to ensure that toxic drugs other than diclofenac are also banned for veterinary use.