TABLE 2.

Fertility of Litomosoides worms as determined by squeeze preparations

Strain	No. of mice	No. of worms	Embryo development in female worms at day 65 p.i.
			No. of worms positive for morula stage	No. of worms positive for stretched MF
C57BL/6	7	2	0	0
IL-4 KO	8	31	23	17
IL-10 KO	8	7	0	0
IL-4/IL-10 KO	8	9	9	2