The genus Hammondia is paraphyletic.
The phylogenetic relationships amongst Hammondia, Neospora and Toxoplasma were investigated by DNA sequence comparisons of the D2/D3 domain of the large subunit ribosomal DNA and the internal transcribed spacer 1. The results obtained allow us to reject the hypothesis that N. caninum and H. heydorni are the same species and show that Hammondia hammondi is probably the sister taxon to Toxoplasma gondii.
Ellis
J T
JT
Department of Cell and Molecular Biology, University of Technology, Sydney, Australia. j.ellis@uts.edu.au
Morrison
D A
DA
Liddell
S
S
Jenkins
M C
MC
Mohammed
O B
OB
Ryce
C
C
Dubey
J P
JP
D000818:Animals; D001483:Base Sequence; D002371:Cat Diseases / Q000469:parasitology; D002415:Cats; D003048:Coccidiosis / Q000469:parasitology / Q000662:veterinary; D016054:DNA, Protozoan / Q000032:analysis / Q000235:genetics; D004275:DNA, Ribosomal / Q000032:analysis / Q000235:genetics; D004283:Dog Diseases / Q000469:parasitology; D004285:Dogs; D021741:Eimeriida / Q000145:classification / Q000235:genetics* / Q000302:isolation & purification; D008969:Molecular Sequence Data; D018688:Neospora / Q000235:genetics*; D010802:Phylogeny; D016133:Polymerase Chain Reaction / Q000379:methods; D016415:Sequence Alignment; D014122:Toxoplasma / Q000235:genetics*
D016054:DNA, Protozoan; D004275:DNA, Ribosomal