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Abstract
Extract
Infection by the protozoan parasite Toxoplasma gondii is widespread in sheep in New Zealand and is recognized as the most common cause of intra-uterine infection leading to abortion and stillbirths (Hartley et al., Citation1954; Hartley and Boyes, Citation1964). In view of the prevalence of this infection in New Zealand, trials were set up to investigate some aspects of the epidemiology of this perplexing disease.