homehome Home chatchat Notifications


Tourists might be bringing diseases to Antarctica's penguins

Tourists are bringing dangerous pathogens to the Antarctic.

Mihai Andrei
December 17, 2018 @ 5:40 pm

share Share

As if penguins didn’t have it rough enough, now humans are also bringing diseases to them.

Credits: B. Dougherty.

Here’s a word you should probably know, particularly if you have pets: zoonosis. Zoonosis refers to infectious diseases which can be naturally transmitted between animals and humans. You can give some strains of the flu to your cat, you can share fungal parasites, and of course, you can get rabies from an infected animal.

In a relatively closed ecosystem like the Antarctic, zoonosis is particularly dangerous. Life is rough, food is scarce, and with the impact of global warming, survival is often on a razor’s edge. That’s why researchers were particularly worried to find human-linked pathogens in bird poop — almost certainly from tourists. Contagious diseases brought from outside the Antarctic can have devastating consequences for penguin colonies, potentially bringing a complete collapse.

“[We’re] obsessed about the potential for novel diseases to jump from wildlife to humans and cause an epidemic,” says ornithologist and ecologist Kyle Elliott at McGill University in Montreal, Canada, who was not involved in the new study. “In reality, the transmission of novel diseases from humans to wildlife has been far more disastrous,” he told Science.

Initially, researchers were skeptical of this possibility — but microbiologist Marta Cerdà-Cuéllar at the Research Center for Animal Health in Barcelona, Spain, felt otherwise. She suspected that humans can indeed carry pathogens to the Antarctic, and set out to analyze this possibility. Along with her colleagues, she collected samples from 666 adult birds from 24 different species — which was no easy feat. Skuas, one of the surveyed species, are extremely clever and have a good memory. If you attempt to catch one and fail, it will never let you get close ever again. Penguins are also very strong.

From these fecal samples, they isolated DNA from Campylobacter jejuni, one of the most common causes of food poisoning in the western world. They also found some strains of Salmonella, as well as another gastrointestinal bug, C. lari, which was found in all surveyed areas. This strongly suggests that the pathogens were brought by humans. Researchers write in the study:

“Three findings suggest reverse zoonosis from humans to seabirds: the detection of a zoonotic Salmonella serovar (ser. Enteritidis) and Campylobacter species (e.g. C. jejuni), typical of human infections; the resistance of C. lari isolates to ciprofloxacin and enrofloxacin, antibiotics commonly used in human and veterinary medicine.”

The consequences of this process are not yet clear, but they can be “devastating,” says Jacob González-Solís, an environmental and evolutionary biologist from the University of Barcelona who was on the team. Researchers call for measures to limit tourism in the area.

“Our results highlight the need for even stricter biosecurity measures to limit human impacts in Antarctica,” they write.

The study is set for publication in the journal Science of the Total Environment.

 

share Share

Federal Workers Say They’re Being Watched by AI for Saying Anything Bad about Trump or Musk

AI monitors federal workers for ‘anti-Trump’ and 'anti-Musk' language as oversight erodes, insiders say.

The World’s Smallest Flying Robot Is Here. It Weighs Less Than a Raindrop and It’s Powered by Invisible Forces

The world’s lightest untethered flying robot takes to the air.

Pulse Oximeters Seem To Be Misreading Oxygen in Darker Skin

Bias in pulse oximeters isn't just a clinical glitch — it’s a systemic issue that puts patients with darker skin at risk.

Birds Are Changing Color in Cities. Here’s Why

Birds in cities are getting flashier — literally.

This Is How Autocrats Quietly Take Over and What You Can Do About It

We can't rely on just the courts. Reversing political backsliding needs the people's voices.

Women With Endometriosis Say Cutting These 4 Foods Eased Their Pain

A new study reveals that eliminating foods like alcohol, gluten, and dairy may offer real relief where medicine often falls short.

Economists forecast the full impact of Trump's 'Liberation Day' tariffs. The US is hit the hardest

Modelling of how Trump’s tariffs will hit global trade suggests the US will be the biggest loser – while a few nations may emerge as surprising winners.

“Thirstwaves” Are Growing More Common Across the United States

Like heat waves, these periods of high atmospheric demand for water can damage crops and ecosystems and increase pressure on water resources. New research shows they’re becoming more severe.

DNA From 7,000-Year-Old Mummies Reveals Lost Society From Sahara

Two ancient mummies reveal a mysterious, isolated lineage in North Africa.

This Warrior Was Buried in Ice Under a Bone Shield for 4,000 Years and His Face Was Just Reconstructed

A neolithic warrior gets a face thanks to modern tech.