Eating well could help spread disease

Scientists studying bacterial infections in tiny water fleas have discovered that increasing their supply of food can speed up the spread of infection. They carried out the study to better understand factors that affect how diseases are transmitted.

Researchers found that when a population of parasite-infected water fleas was well-fed, some of them became highly contagious, compared with when food was limited.

Epidemic spread

“If we have an idea of which individuals transmit a lot of disease, we will be better able to stop its spread,” said Dr Pedro Vale, School of Biological Sciences.

Scientists say the discovery highlights that, under certain conditions, some individuals may be more prone to spreading disease than others.

Their findings could help inform ways to monitor and control the spread of infections, such as epidemics, in large populations.

Some well-fed water fleas were more infectious than others because they were able to survive for longer with the parasite, giving it more time to multiply.