19th century bottled excrement could provide valuable cholera insights

A rather odd ‘message in a bottle’ from 1853 might shed light on one of the present-day world’s most serious diseases

A sealed sample bottle containing liquid excrement from a Danish patient infected with cholera during an epidemic that raged in Copenhagen in 1853 might be able to provide scientists with new information on the disease.

READ ALSO: The worst toilet in Scotland? Try digging your hands into the oldest toilet in Denmark!

Peter Kjær Mackie Jensen, an associate professor at the centre for disaster research at the University of Copenhagen, wants to compare the capital’s epidemic with ones that tend to currently take place twice a year in Bangladesh.

The sample could provide valuable insights, Videnskab.dk reports.

Precious bodily fluids
Polluted drinking water is usually the major carrier of cholera. If a person gets a large amount of the cholera bacteria in their intestinal system, they begin to produce a poison that causes the cells in the walls of the intestine to secrete enormous amounts of fluid. They can excrete 12-13 litres of fluid and intestinal cells per day.

The bottle had been labelled by the Norwegian doctor attending the patient at the cholera hospital on Sankt Annæ Plads in 1853, so the contents and context are known.

“We know the patient had a severe attack of cholera, but we also know that he or she survived,” Jensen said.

“Perhaps the cholera bacteria are still alive. That would be amazing. It would give us a completely new insight into the development of the disease,” Jensen added.

Broaching the subject
At the moment, the researchers are applying to several funds for economic support to enable them to open the 160-year-old sealed bottle.

At the Niels Bohr Institute they are trying to work out the best way of drilling a hole in the bottle without destroying it.

“We have no way of knowing whether it will explode when we begin to play around with it,” Jensen said.

“Perhaps a fermentation process has taken place that has caused massive pressurisation. We might risk being covered in cholera-infected excrement.”




  • A country famous for lots of rain, Denmark craves for tears from the sky

    A country famous for lots of rain, Denmark craves for tears from the sky

    Two years ago, Denmark had a very dry Spring. This year, Farmers are reliving the trauma of 2023. While tourists and sun-starved Danes enjoy the sunny weather, farmers are nervously scouting for rain

  • “Ready to spend even more than 4% of the GPD” says Minister of Defense

    “Ready to spend even more than 4% of the GPD” says Minister of Defense

    At the Copenhagen Democracy Summit 2025, Danish Minister of Defense Troels Lund Poulsen stated that Denmark is willing to spend more on defense. During a conference, he said the country is ready to surpass the original target set by the European Union

  • ReDI school wins Danish Diversity Award for empowering marginalized women in tech

    ReDI school wins Danish Diversity Award for empowering marginalized women in tech

    A non-profit tech school in Denmark is recognized for helping migrant women secure jobs aligned with their qualifications through digital training and networking.

  • Danish bravery in the Nanjing Massacre

    Danish bravery in the Nanjing Massacre

    Bernhard Sindberg was a Dane who saved thousands of Chinese during the Nanjing Massacre, one of the darkest episodes of the 20th century. He is often compared to Oskar Schindler. A book has told his story, and a statue in Aarhus commemorates him—yet few people know about his remarkable actions. The Copenhagen Post spoke with Sindberg’s niece, who still remembers her uncle well, to shed light on this seldom-told and incredible story

  • More Danes are uncomfortable with English replacing Danish in daily life

    More Danes are uncomfortable with English replacing Danish in daily life

    A survey from NORSTAT, commissioned by Sune Steffen Hansen and published exclusively by The Copenhagen Post, shows that around 40% of the population is uncomfortable with English replacing Danish in their daily lives. While this is not a problem for the younger generation, half of the people in older generations have an issue with it

  • Be a green tourist – get free access to Copenhagen’s attractions

    Be a green tourist – get free access to Copenhagen’s attractions

    CopenPay is back. Last year’s attempt to get guests to take a sustainable approach when visiting Copenhagen’s attractions will be back in 2025, on an even bigger scale. 90 attractions are participating across Copenhagen and running throughout the summer

Connect Club is your gateway to a vibrant programme of events and an international community in Denmark.