Doctors have said that a woman has suffered a dramatic weight gain after a fecal transplant from her daughter.

The medical procedure transplants healthy bacteria into a diseased gut but doctors have said that the procedure may have affected her weight. Doctors have said that she quickly gained 36lb and is now classified as obese.

A medical expert from the UK said that the link between gut bugs and obesity is not clear yet. Doctors use the procedure to introduce good bacteria into the gut. Dr Colleen Kelly, from the Medical School at Brown University, said that the procedure was discussed with the woman and she asked to use her daughter. The woman had an infection that was resistant to antibiotics and her daughter was overweight at the time. While the procedure was successful in treating the woman's infection it may have resulted in obesity.

The produce received the backing of the UK health service in the previous year. The procedure is used when people have stubborn Clostridium difficile infection in their bowels. This infection can cause vomiting, diarrhoea and abdominal pain and may not be treated with antibiotics.