Triathlete Hospitalised With Bacterial Infection After Open-Water Swim, As Welsh Project Tracks Water Quality

A triathlete from Carmarthen has described how a bout of illness contracted while swimming in open water left him seriously unwell in hospital, just days before he was due to compete in one of the biggest races of his career.

Andrew Jones, a keen triathlete who travels internationally to take part in competitions, said he became sick after swimming in what he described as "dirty" water. He was diagnosed with Campylobacter, an infection caused by bacteria that is commonly linked to contaminated water and food.

The timing could hardly have been worse. Jones was preparing to compete at the Ironman World Championship in Kona, Hawaii — an event for which he had earned a qualifying slot — and the illness struck only about a week before he was due to travel and race.

Recalling the onset of his symptoms, Jones said he began to feel extremely unwell at home on a Sunday evening. His temperature rose, his heart rate increased and he found himself shaking uncontrollably, prompting him to go straight to an accident and emergency department.

He described contracting Campylobacter from polluted water as "pretty nasty", adding that the experience was particularly frustrating given how close it came to one of the most significant races of his life. Jones said the episode had made him think twice about swimming in the same area again.

His case has highlighted a wider concern for the sport in Wales, where athletes regularly train and compete in the sea, lakes and rivers. In response, Triathlon Cymru — the national governing body for the sport — has been developing a project intended to give a far more detailed picture of water quality at competition sites.

The initiative, called Safer Blue Spaces, is described by Triathlon Cymru as the first of its kind. It is being run in partnership with Swim Wales, Bangor University and Imperial College London, and is funded by the insurance group Admiral.

At the heart of the project are small sampling devices, roughly the size of a fifty-pence piece, which are attached to the backs of competitors' wetsuits. Some of the athletes taking part in Barry's SWYD Sprint Triathlon in August were pulled aside before their race so the devices could be fitted.

The approach differs significantly from the way water is normally checked before an event. Race organisers typically collect samples at only one or two locations shortly before the race, a method that offers a limited snapshot of conditions and does not capture variation across a course.

By contrast, the wearable passive samplers travel the exact route taken by swimmers, meaning the data they gather reflects what athletes are actually exposed to during the swim leg. Once competitors finish the swim, they head to the transition area, remove their wetsuits and continue the race, while the technical team cuts the devices free so they can be sent to Bangor University for analysis.

Kate Herridge, a PhD student involved in the research, explained that the next stage involves concentrating the water samples and establishing whether any pathogens have attached themselves to the samplers. She said the team is able to remove the devices, concentrate the samples and then detect what is present within them.

Amy Jenner, Triathlon Cymru's head of development, said understanding what is in the water is vital for an organisation that places athletes into it. She noted that Wales hosts roughly 60 triathlon events a year, which makes reliable information about water quality a priority for the governing body.

Jenner said the funding available through the project allows Triathlon Cymru to carry out research and testing, and then report back to athletes, event organisers, Natural Resources Wales and Public Health Wales with a clearer picture of the state of Welsh waters.

Simon Webb, who organises the Barry SWYD Sprint Triathlon, said it was important that athletes could swim without the risk of potentially falling ill — a sentiment that echoes the concerns raised by Jones following his own experience.

For now, Jones's story serves as a reminder of the potential health consequences of open-water swimming in polluted conditions. He remains an active competitor, but the infection has left him cautious about returning to the water where he believes he picked up the bacteria.

Triathlon Cymru hopes the Safer Blue Spaces project will eventually allow it to share its findings with environmental agencies and water companies, improving understanding of what is present in seas, lakes and rivers and helping to drive efforts to improve water quality.

If that happens, the project could offer benefits beyond the sport itself, giving regulators and utilities evidence to act on while giving athletes greater confidence that the water they race in is safe.