Mapping bedbugs: S Korean blockchain engineer fights infestation with data

SEOUL - When news broke about a bedbug outbreak in his native South Korea, 29-year-old blockchain engineer and self-professed insectophobe Kang Jae-gu got straight to work – on the data.

As the authorities scrambled to install high-temperature steam heaters at the airport and approve industrial-strength insecticides for home use, he started mapping reported infestations.

South Korea has been largely bedbug-free for years, but it has seen a

surge in infestations

as travel has rebounded after the pandemic – with more than 100 cases of the blood-sucking pests reported since late November, official statistics show.

And while the public has bugged out – and media coverage has spiralled – thousands of people have turned to Mr Kang’s website, bedbugboard.com, for a sober data-driven look at the outbreak.

“I am extremely sensitive to insects, so I sleep under a mosquito net throughout all four seasons,” he said.

His fear of bedbugs drove him to create an interactive map that shows the approximate locations of reported infestations across the country, as well as real-time news stories on the issue.

The site now receives as many as 50,000 visitors a day, up from around 40 when he launched it.

He used an olive-green colour scheme to try and create “peace of mind” for readers, but he said that having to look at photographs of the critters and their eggs to run the website still gives him “goosebumps”.

From Paris?

The bedbug invasion of Seoul comes on the heels of a

similar outbreak in Paris

, which is set to host the Olympic Games in 2024.

A surge of reported sightings of the creatures sent a shudder through France during the summer and fall, prompting several school closures nationwide.

Public concern has also spread to Britain and Algeria.

In South Korea, 44 per cent of reported cases have been in so-called gosiwon – cheap, tiny housing units typically measuring less than 5 sq m.

Other affected locations include student dormitories, public bathhouses and extremely small housing units known as jjokbang, which often lack basic amenities such as bathrooms and kitchens.

The authorities have swung into gear, with the Seoul city government allocating 700 million won (S$714,000) to defend residents in vulnerable housing from the invading pests.

Incheon International Airport, the main airport serving the capital, plans to install high-temperature steam heaters in December to prevent the entry of the bugs into the country.

Seoul recently approved Neonicotinoids, a class of insecticides used widely on farms, for home use against bedbugs.

“The city of Seoul defines the inconvenience and concern of citizens caused by bedbugs as a significant public health issue,” said Ms Park Yu-mi, an official at the Seoul Metropolitan Government.

Hard to remove

Bedbugs have appeared in greater numbers in recent decades, mostly due to high population densities, people taking more holidays and mass transit.

In France, one in 10 households is believed to have had a bedbug problem over the past few years.

This usually requires a pest control operation costing hundreds of euros that often needs to be repeated.

The critters bite people to feed on their blood, creating wounds that can be itchy but do not usually cause other health problems.

But exposure to bedbug droppings can trigger asthmatic attacks, while bites can also cause rashes or more severe reactions such as anaphylaxis and even depression.

South Korean experts said the insects are particularly hard to eradicate.

“Bedbugs can live for over 100 days even if they do not eat properly. They are thin and hide well,” Professor Kim Ju-hyeon at Seoul National University’s School of Tropical Medicine said in a YouTube video.

Mr Kang plans to keep his website running until the South Korean outbreaks subside.

He said he has never personally experienced an infestation but “I can imagine how stressful it would be if that happened to me”. AFP