Virulence and transmission of T. gondii strains isolated from French Guiana.

aCumulative mortality of CD1 mice infected intraperitoneally with 10, 100, and 1000 parasites/mouse (5 mice/dose, 15 mice/strain).bOral transmission using CD1 mice infected orally with 20 tissue cysts/mice (5 mice/strain).CChallenge of cats with 100–800 tissue cysts/cat.dTiter, generally considered positive when ≥25.eUnique genotype other than type I, II, and III.frelated to type I allele.gnegative by bioassay in mice.nd, not done.Sacrificed at day 10 prior to development of positive titer.Virulence and transmission of T. gondii strains isolated from French Guiana.