We have interrupted the parasites' life cycle by not allowing ourselves to
be eaten by cats. Particularly our BRAYNES.

Evolutionary parasitologists have suggested that toxoplasmosis infection may
have made early hominids less fearful and more curious by dicking with our
neurochemistry.

T, gondii is one of my favorite boogers.

I wish people would not post and reply cross post into know troll newsgroup
it just brings them here and the rest of us have to deal with their dribble

eats a bird or mouse?

Short version: yes, all animals can become infected with toxoplasmosis from
uncooked meat of an infected animal or from feces from an infected cat 24
hours after excreted from the cat.

Short version: Yes, it is possible to contract toxoplasmosis from dust
particles of infected cat feces that is more than 24 hours old and all
sources (human medicine sources) stress the extreme rareness of this
infection route in modern societies.  These sources also comment that most
recorded cases of infection by inhalation reveal a home that has a poorly
maintained roof/attic where  cat feces was discovered or are related to
having a primary residence built out of vegetation.

A detailed explanation of toxoplasma gondii, the causative agent of
toxoplasmosis:

Prevalence of this parasite in domestic animals is high (sheep 20%, cattle
25%, pigs 30%, dogs 30%, cats 45%, birds 12%). The most common mode of
infection to a cat is through rodents.  The most common mode of transmission
to people is undercooked pork  (this is one of the main reasons it is
strongly recommended to cook pork to an internal temperature of at least 160
degrees).
The Center for Disease Control (CDC) estimates that over 60 million people
are infected with toxoplasma gondii and are asymptomatic or experience
flu-like symptoms only.  When symptoms due occur, the most common complaints
are; fever, malaise (a vague feeling of discomfort), lymphadenopathy
(enlarged and sometimes painful lymph nodes), encephalitis (inflammation of
the brain), myocarditis (inflammation of the muscular walls of the heart),
pneumonitis (inflammation of the lung), and retinochoroiditis (inflammation
of the retina of the eye).  25% of AIDs patients die from toxoplasmosis most
commonly because of a dormant toxoplasmosis.   Congenital toxoplasmosis
(from mother to baby) causes retinochoroiditis, intra-cerebral calcification
(calcium deposits in the brain cause it to become hardened), hydrocephalus
(fluid backup/accumulation in the brain), convulsions, mental retardation &
learning abilities.  This was a major concern for physicians of expectant
parents until the life cycle of the parasite was discovered.  Many
physicians insisted that pets, especially cats be destroyed or at least
removed from any expectant household.
Through experimentation, it was discovered that toxoplasma gondii oocysts
(you can think of this like an egg that is produced by a more mature form of
the parasite) are excreted in the feces of cats and become infective in
about 24 hours.  The production of oocysts only occurs in cats.  When
toxoplasmosis is spread through the meat from other animals it is from
eating meat that has not been cooked thoroughly.  Cats will shed tens of
thousands of oocysts during the time that they are infected (and probably
asymptomatic).  This stage of infection lasts about 3 days.  Since most cats
have been infected at one time in their life, and since infection does not
mean the cat is shedding oocysts, testing the cat for this parasite is not
extremely helpful.  While some doctors will prefer to err on the side of
caution and insist or strongly recommend that expectant families remove any
cats from their homes, it is only necessary to take precautions.
1. Avoid contamination of your cat by feeding them dry, canned or thoroughly
cooked food, prevent them from hunting, empty litter boxes daily (the oocyst
needs at least 24 hours to sporulate and become infective), wear gloves or
thoroughly wash hands after working in the garden, with soil, before eating,
or touching the face.  cover children's sandboxes when not in use (many
outdoor cats use them for litter boxes), boil water from streams, ponds or
lakes before drinking it.
2. Avoid ingestion of tissue cysts by cooking meat to over 156 degrees
Fahrenheit, washing hands after handling raw meat, freezing meat for one day
in a household freezer also kills tissue cysts.
3. An air filtering mask can be worn when gardening or emptying litter
boxes.  Prompt removal of cat feces, then flushing, or bagging them in
zip-locking bags will help prevent infection by inhalation.

through

feces

That's true for my cat Fireball.
My cat Cerberus, on the other hand, leaves disturbingly human looking
"deposits".