Sandra L Wegert <sandraw at U.Arizona.EDU> wrote:
>>> I thought "catch-scratch fever" was Toxoplasmosis, a simple "blood"
> protozoan that "all" cats carry and about half of all humans have
> been exposed to (have antibodies)...
Cat scratch disease is caused by a bacteria, currently designated
Bartonella henselae, that can be carried by cats.
This is distinct from Toxoplasma gondii, which is, as you point out, a
protozoan. Domestic cats are the definitive host for T. gondii but not
all cats are infected and human exposure can occur from other sources,
most importantly undercooked meat.
WB Thomas DVM