Toxoplasmosis

Not only reduce outdoor and feral cats our wildlife dramatically but outdoor cats are also the main vector for toxoplasmosis.

A checked by a vet and contained cat is tge safest cat for their keeper, all other land creatures as for the marine life.

Please listen to this video of a person how it is to live with the animal disease toxoplasmosis. .. http://halo.org.nz/living-toxoplasmosis/

Read more here about toxoplasmosis: http://cmr.asm.org/content/25/2/264.full

In marine life:

Domestic cats and wild felids are the only known definitive hosts capable of shedding T. gondiioocysts in their faeces.

http://www.mdpi.com/1660-4601/10/3/994/htm