Table 2. Summary of studies on size of tissue cysts in the brains of rodents inoculated with T. gondii.

Host				T. gondii strain	Tissue cyst data				References
Host	Strain	Sex	No.		P.I.	Methods	No. measured	Size
Mice	BALB/c	M	5	aME49	1, 2, 6 mo	Brains fixed, cryosectioned, FITC-DB	NS	1 mo-7-20 μm,2 mo-3-30 μm,6 mo-5-25 μm	[28]
Mice	STR, Outbred, albino	NS	18	bSRRA	3, 6, 12, 18, 22 mo	Brains fixed, 1 μm sections stained		3 mo-15-30 μm,6 mo-20-50 μm,12-22-30-50 μm	[29]
Mice		NS	20	cBurk	4, 8, 12, 16 and 24 weeks	Brain homogenate in saline	100 at each time point	8 weeks-38 μm,12 weeks-40 μm,16 weeks-41 μm,24 weeks-42 μm	[30]
Mice	CBA/J	F	10	ME49	3,4,5,6,8 weeks	Percoll isolated tissue cysts	630	Tissue cyst size relatively constant at 5 points studied	[31]
Rat	Sprague-Dawley	F	35	dVEG	75 days	Brain, formalin fixed, histological sections, HE stain	224	Up to 50 μm, most 22.5 to 30 μm	[32]

^a Type II, 200 tachyzoites, subcutaneously.

^b Beverley strain from rabbit, genotype unknown, 12 tissue cysts, subcutaneously.

^c Genotype unknown, tissue cysts, subcutaneously.

^d Type III, 1–1 million oocysts, orally.

M = Male, F = Female, NS = Not stated, mo = Month, P.I. = Post infection.