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Abstract
Extract
Sir: Because Toxoplasma gondii is frequently identified in dead lambs and placentas from ewes which have aborted, this association is often interpreted as one of cause and effect. However, T. gondii is well-adapted parasite and may in fact be isolated from the placenta at lambing even when the lamb survives and is reared normally. Unless the frequency of infection can be determined in both the surviving and non-surviving neonates, it is not possible to estimate the prevalence of abortion and perinatal mortality due to toxoplasmosis.