Parasite found in pre-washed vegetables in Kent
A parasite has been found in pre-washed vegetables from major supermarkets
Cryptosporidium has been discovered in pre-washed vegetables from major supermarkets in Kent by researchers in the University of Kent’s School of Biosciences.
The water-borne and food-borne parasite Cryptosporidium, which has most recently been identified for contaminating drinking water in areas of the UK, was found in over 17% of samples.
Cryptosporidium can cause symptoms such as diarrhoea, vomiting, stomach pains and fever.
Dr Anastasios Tsaousis, the research lead, said: "Whilst our 2023 study cannot distinguish between live and inert Cryptosporidium, it is nevertheless important in that the presence of Cryptosporidium in pre-washed vegetables could mean revisiting the sanitation methods employed by suppliers along the chain of production such as improved hygiene measures during harvesting, processing, packaging, transportation and storage.
"There is also a need for increased awareness among consumers on the adequate storage of vegetables and handwashing before eating."
Cryptosporidium is typically found in lakes, streams, rivers and untreated drinking water.
It is contagious and most notably transferred from another person or animal by touching faeces, or by swimming in or drinking contaminated water.
While pre-washed and ready-to-eat vegetables undergo more thorough washing with water containing chlorine disinfectants compared to unpackaged vegetables, Cryptosporidium particles (oocysts) are actually resistant to disinfection with chlorine and can only be reliably removed by boiling water or filtration.
So, they are expected to be free from parasites and ready to eat straight from the packaging, but some oocysts remain and are likely to cause illness.
Cryptosporidium has most recently been identified for contaminating drinking water in areas of the UK.
Residents in Devon have been boiling their water for nearly a month due to an outbreak.