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. 2000 Mar;38(3):1298-301.
doi: 10.1128/JCM.38.3.1298-1301.2000.

Genetic and antigenic evidence supports the separation of Hepatozoon canis and Hepatozoon americanum at the species level

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Genetic and antigenic evidence supports the separation of Hepatozoon canis and Hepatozoon americanum at the species level

G Baneth et al. J Clin Microbiol. 2000 Mar.

Abstract

Recognition of Hepatozoon canis and Hepatozoon americanum as distinct species was supported by the results of Western immunoblotting of canine anti-H. canis and anti-H. americanum sera against H. canis gamonts. Sequence analysis of 368 bases near the 3' end of the 18S rRNA gene from each species revealed a pairwise difference of 13.59%.

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Figures

FIG. 1
FIG. 1
Alignment of a portion of the 18S rRNA gene from H. americanum (United States) and H. canis (Israel) and two Hepatozoon species, H. sipedon from a snake and H. catesbianae from a frog. Only the nucleotides that are different from those of H. sipedon are shown.
FIG. 2
FIG. 2
Western blot analysis of H. canis gamont antigens recognized by sera from dogs infected with H. canis and H. americanum. Reactions of sera from different dogs are shown as follows: lane 1, serum from a dog experimentally infected with H. canis; lane 2, serum from a dog with a naturally occurring H. canis infection; lanes 3 to 5, sera from three dogs that were naturally infected with H. americanum; lanes 6 and 7, control serum from a blood donor dog at Auburn University and from preinfection serum from the experimentally infected dog, respectively. Lane M contains molecular mass markers. Note the triplet of bands with relative rMM of 32 to 28 kDa that are reactive only with anti-H. canis sera.

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