Ao. Heydorn et H. Mehlhorn, Further remarks on Hammondia hammondi and the taxonomic importance of obligate heteroxeny, PARASIT RES, 87(7), 2001, pp. 573-577
In this opinion-paper reasons are given why Hammondia hammondi cannot be co
nsidered as a separate species, but should be kept as a species of the genu
s Toxoplasma, if not a strain of Toxoplasma gondii.