Indian vultures: Decline of scavenger birds caused 500,000 human deaths
www.bbc.com
A new study links the vulture decline in India to deadly bacteria spread, causing about 500,000 deaths.

BBC: How decline of Indian vultures led to 500,000 human deaths 25 JUL 2024

More than two decades ago, India’s vultures began dying because of a drug used to treat sick cows.

By the mid-1990s, the 50 million-strong vulture population had plummeted to near zero because of diclofenac, a cheap non-steroidal painkiller for cattle that is fatal to vultures. Birds that fed on carcasses of livestock treated with the drug suffered from kidney failure and died.

The unintentional decimation of these heavy, scavenging birds allowed deadly bacteria and infections to proliferate, leading to the deaths of about half a million people over five years, says the study published in the American Economic Association journal.

“Vultures are considered nature’s sanitation service because of the important role they play in removing dead animals that contain bacteria and pathogens from our environment - without them, disease can spread,” says the study’s co-author, Eyal Frank, an assistant professor at University of Chicago’s Harris School of Public Policy.

“Understanding the role vultures play in human health underscores the importance of protecting wildlife, and not just the cute and cuddly. They all have a job to do in our ecosystems that impacts our lives.”

The authors estimated that between 2000 and 2005, the loss of vultures caused around 100,000 additional human deaths annually, resulting in more than $69bn (£53bn) per year in mortality damages or the economic costs associated with premature deaths.

These deaths were due to the spread of disease and bacteria that vultures would have otherwise removed from the environment.

“The vulture collapse in India provides a particularly stark example of the type of hard-to-reverse and unpredictable costs to humans that can come from the loss of a species,” says Mr Sudarshan, an associate professor at the University of Warwick and co-author of the study.

It is amazing to see what a difference these birds most take for granted contribute to our success as a species.

Many find vultures to be creepy, but after learning about some of their amazing abilities and understanding why they’ve evolved to become what they are, they are superbly designed animals that excel at doing a very important job.

White-rumped vulture (Population loss since 2000: 98%)

Indian vulture (Population loss since 2000: 95%)

Red-headed vulture (Population loss since 2000: 91%)

  • anon6789OP
    10•4 months ago

    This article has the best account of why its use was/is so widespread. Here are some select lines from the article:

    The introduction of hybrid cows in India coincided with global trends of the chemicalization of agriculture, medicine, and veterinary science.

    In the shadow of antibiotics, diclofenac, a common painkiller also for human use, has become a “blockbuster drug” in more-than-human medicine. High-yielding cows undergo relentless cycles of pregnancy by artificial insemination, birth, and lactation. In India, diclofenac was the drug of choice to treat the many pains of high-performance cows, among them mastitis, a painful inflammation of the udder.

    Diclofenac is a cheap, nonsteroidal anti-inflammatory drug (NSAID) and thus within the same class of pharmaceuticals as aspirin (ASS) or ibuprofen.

    Diclofenac has been sold since 1973 under the brand name Voltaren as an over-the-counter remedy for arthritis pain in humans and domestic animals. With the end of patent protection, it has become one of the most widely used NSAIDs across the world, and its generics are available in India under a variety of brands.

    Human and other mammalian bodies metabolize diclofenac and excrete it via the kidneys and the renal system. Healthy mammalian kidneys can deal with the drug reasonably well. To birds, however, diclofenac is a deadly toxin. Birds who ingest diclofenac die of severe renal failure as the effect of kidney necrosis.

    Based on emerging evidence of avian kidney toxicity, scientific and political pressure led to the eventual ban of diclofenac for veterinary use in India in 2006. However, many veterinarians consider diclofenac so important for the care of milk cows that they continue to use the drug illegally by misappropriating drugs designated for human use only. Pharmaceutical companies played along by labeling the liquid 30 ml vials, popular among veterinarians injecting the drug, as multi-dosage preparations for human usage

      • anon6789OP
        4•4 months ago

        The ignoring the science part for sure is bad, especially by the manufacturers. But they have probably also saved many human lives by providing more and cheaper food, which was the point of the hybridization in the article.

        There seem to be better all around alternatives now, though maybe not as cheap or well known yet.

        Hopefully they will continue to replace this old drug and the vultures may someday bounce back.

        Science is wonderful, but when we use it for greed, it can become quite terrible as well.

    • Flying Squid
      3•4 months ago

      And yet cows are supposed to be sacred to Hindus?

      • anon6789OP
        5•4 months ago

        I don’t know very much on Hinduism or India in general honestly, but much like with the US, Europe, or wherever we are, we dont need to look far to find a combination of rich people or wannabe rich people ignoring religion for profit and also poor people forced to compromise beliefs to earn a living.

        I do recall recent protests by farmers there due to really damaging farm bills, so I dont think the actual farmers there rank high socially or politically.

        It’s important to remember the vast majority of people anywhere are decent, they are just getting screwed by that small percentage that doesn’t care. I’m sure most of us work for some less than ideal employer, but we don’t always need to get judged by that, we’re just trying to make a buck too. There’s about a million things I’d rather be before Indian dairy farmer comes up, so I’m not going to judge them here. It seems like a hard, hot, nasty job, with little economic benefit to most people involved.

        Those pharma people though, and any big ag operation still skirting the rules once the science was out, drag them through the mud all you want though.