Costa Rican Sloth Fur Investigated as a Possible Superbug Solution in Study

Scientists theorize a balanced coexistence of potential disease vectors and microorganisms within sloth fur. (Photo via

Inappropriate antibiotic treatment has caused bacteria to evolve into antibiotic-resistant “superbugs.” Scientists have discovered that sloth fur may harbor antibiotic-producing bacteria, which may provide a solution to the crisis.

Taipei, Taiwan (WS News Publisher) – A recent scientific investigation has commanded attention by suggesting that Costa Rican sloths might illuminate the path to the future of medicine. Due to inappropriate or excessive use of antibiotics in recent years, bacteria and microorganisms have continued to evolve, becoming resistant to existing antibiotics and evolving into superbugs. Scientists have discovered that sloth fur may harbor antibiotic-producing bacteria, which may provide a solution to the problem.

The medical journal “The Lancet” revealed in “Global Research on Antimicrobial Resistance” published in 2022 that antimicrobial resistance (AMR) has caused 1.27 million deaths worldwide, exceeding the number of deaths from AIDS or malaria each year. The number of deaths related to AMR is about 4.95 million, which shows that this problem has seriously affected the health of the world’s population.

The study, which analyzed statistics from 204 countries or regions, found that the problem has spread worldwide. The researchers knew from hospital records that the groups most at risk were children, with about one-fifth of the directly related deaths occurring in children under the age of five. Regionally, sub-Saharan Africa and South Asia had the highest rates, with 24 deaths per 100,000 associated with AMR. High-income countries accounted for a lower proportion, with 13 deaths per 100,000 population.

WHO estimates that by 2050, the annual death toll due to AMR will reach 10 million. Cornelius Clancy, a professor at the Department of Medicine at the University of Pittsburgh, believes that the traditional antibiotic model that has been used for decades has come to an end, starting with penicillin. One of the ways to improve microbial resistance is to find a new form of treatment. And the ecological chain that inhabits the sloth’s fur ignites their hopes.

The slow and lovely sloth is an important symbol of the Central American country Costa Rica, attracting many tourists to come here every year for pilgrimage. The main growth area is in the jungle canopy along the Caribbean Sea. Since the numbers of the two-toed sloth and the three-toed sloth are decreasing, they are currently included in the Red List of Threatened Species by the International Union for Conservation of Nature (IUCN). Scientists in Costa Rica found that there are abundant species living in its fur, including microorganisms such as insects, fungi, algae, and bacteria. Some species have the possibility of causing disease and infection, but the sloth does not seem to be affected.

Max Chavarria, a researcher at the University of Costa Rica, mentioned that when we look at the fur of the sloth, we will find tiny creatures moving, including various insects, moths, and bacteria and microorganisms that we cannot see with the naked eye. For such a rich variety of organisms to coexist and for the slow sloth to survive at ease, there must be a balance system.

The research team took fur samples from two-toed and three-toed sloths to confirm whether there are microorganisms that can produce antibiotics on the sloth’s fur, allowing it to fight against pathogens brought by various insects or bacteria to maintain balance. They found 20 possible microorganisms from the fur samples, and are now working on research and naming, hoping to find antibiotics that can be applied to the human body in the future to help fight germs.

Although it will take some time to confirm whether these microorganisms are beneficial to human health, at least it allows scientists to find new ingredients that can be used to combat antibiotic resistance in the medium and long term to control the proliferation of pathogenic bacteria or inhibit fungi. These possibilities may lead to a new generation of antibiotics, just as the British scientist Alexander Fleming discovered penicillin in 1928. Research on sloth fur has been published in “Environmental Microbiology”.

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