TABLE 1.

Strains of T. gondii according to genotype, origin, and capacity to cause TE and mortality in CBA/Ca mice

Strain	Genotype	Origin	Infectivity for CBA/Ca mice
			TEa	Mortality (%)b
CAST	I	Human with TE	+	100
VEL	I	Human with TE	+	100
WIL	II	Human with TE	±	<10
SAV	II	Human with TE	−	<10
MOY	II	Human with TE	+	<10
HART	II	Human with TE	+	<10
DAG	II	Human with TE	±	0
FORT	II	Human with TE	+	10
DEY	II	Human with TE	±	<10
VEG	III	Human with TE	+	30
MOO	III	Human with TE	+	100
SOU	III	Human with TE	±	80
OPE	III	Human with TE	±	<10
SS	NDc	Human with TE	−	<10
MEG	ND	Human with TE	−	<10
C56	I	Chicken	±	100
M7741	II	Sheep	±	<10
ME49	II	Sheep	++++	10

^aTE infectivity ranged from absent (−) to severe (++++).

^bAfter 6 weeks of infection.

^cND, genotype not defined at the time of the study.