Animal experimentation: the State seals the fate of thousands of monkeys in less than two months Animal experimentation: the State seals the fate of thousands of monkeys in less than two months

Animal experimentation: the State seals the fate of thousands of monkeys in less than two months

Animal testing
16.07.2025
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In less than two months, from March 27 to May 19, the French Ministry of Higher Education and Research approved six projects condemning 3,046 monkeys to endure all sorts of tests from virus inoculation to cranial implants. As always, there is no lack of stress and pain. We lift the veil on these cruel practices and their victims.

Harsh regulatory tests

To test the toxicology of drugs, no fewer than 1,120 marmosets and 1,120 long-tailed macaques will undergo experiments categorized as “moderate” and “severe”. What is merely a regulatory routine for the laboratories is a real ordeal for the animals. For months on end, they have to endure blood, urine and deep fluid samples… and even organ biopsies. And when it comes to sampling, this means restraint, sedation and several hours’ isolation in individual cages… These horribly invasive procedures generate intense stress, pain, lesions and infections, with risks of paralysis, lameness and arthritis. Not to mention the effects of the products tested, which can immediately cause neurological, immune, inflammatory or metabolic disorders in the animals. 2020 of the monkeys used in this way will be put to death after these procedures.

Hundreds of tormented individuals…

Not all toxicology tests are compulsory. For a non-regulatory study, 256 cynomolgus macaques and 46 rhesus macaques will be administered substances both orally and by injection every week, if not every day. They too will be immobilized for long periods, certainly in “restraint chairs”, including for infusions lasting up to four hours. And those who are not killed at the end of this ordeal will be kept alive only to relive similar torments… 

Hundreds of other animals will be used:

  • 400 macaques will be injected and sampled over a three-year period, and subjected to up to 10 vaccinations.
  • 70 marmosets will be deliberately infected with the H1N1 influenza A virus, then subjected to repeated blood and nasal sampling. All will be put to death to prevent contamination of humans. The very people who made them sick, that is…
  • For tests on Alzheimer’s disease, scientists will operate on 13 long-tailed macaques to insert implants into their brains, which will remain there for weeks. This painful procedure will be supplemented by repeated injections of streptozotocin. And the misfortunes of these individuals don’t stop there, as they risk oedema, infections, inflammation and hallucinations… until they are slaughtered.

… and babies torn from their mothers

21 young rhesus monkeys will be “used” to study the consequences of early negative experiences on behavior. Half of them will be separated from their mothers at birth and raised without their social group. For a week, they will be deprived of their loved ones, disoriented, in a foreign environment, with, once again, restraint cages… An extremely stressful experience, since that’s the whole point of this “staging”. And their suffering will continue, since their return to their group will itself be a source of stress and potential injuries…

We will continue to shed light on what happens to the animals on the scientists’ cold benches. Sign to demand an end to these practices on primates!

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