Toxoplasmosis can be found in raw meat, cat faeces and soil where they have defecated and unpasteurised goat's milk.

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Even more surprising was the discovery that infection byS. neurona makes toxoplasmosis, the disease caused by T.gondii infection, worse.

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The evidence that human toxoplasmosis does more than appears at first sight is, it must be said, quite scattered.

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Most children who are born with my disease, toxoplasmosis, have profound side-effects that can include organ failure, blindness, and intellectual disabilities.

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But toxoplasmosis - the disease in humans - can cause serious complications in people with weakened immune systems, such as those with HIV and cancer.

BBC: Infection risk posed by cats revealed

Type X Toxoplasma gondii in a wild mussel and terrestrial carnivores from coastal California: New linkages between terrestrial mammals, runoff and toxoplasmosis of sea otters.

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Experts say more research is needed into a disease spread by cats after figures show an estimated 350, 000 people a year in the UK become infected with toxoplasmosis.

BBC: Infection risk posed by cats revealed