- Food and vegetable/fruit contaminated with animals feces hairy (cat)
- Eating undercooked meat from infected animals
- Through blood transfusion or organ transplant from infected donors
- In congenital (inherited) from mother to their babies when pregnant women were infected during the first month of her pregnancy.
On the cycles of toxoplasma godii, rat have on the first chain cycles as the first hospes of this parasite, then move to the rat after fed rat. The parasite then out from cat feces and because the cat never go to bath, this parasite can exist on the cat fur. People who have cat as their pet can exposed to this parasite and infect by toxoplasma.
Rat that is infected by this parasite have abnormal behavior, not other normal rat that afraid from the rat, infected rat tend go to close to the rat in order fed by cat. This changes of rat behavior is caused by toxoplasma infection to the rat brain become damage and change their behavior.