'20 days after being infected with C. rodentium, only half of (C3 KO mice) survived. By contrast, all animals with normal C3 levels survived. 12 days after infection, mice lacking C3 had lost, on average, more than 20% of their body weight, whereas those with normal C3 levels lost no weight.'

Surprise find: a blood-based immune system is discovered in the gut

Immune guardians called complement proteins are manufactured by gut cells and help to protect against pathogens. Immune guardians called complement proteins are manufactured by gut cells and help to p...