INVESTIGADORES
SCHNITTGER Leonhard
artículos
Título:
At least two genetically distinct large Babesia species infective to sheep and goats in China.
Autor/es:
LIU AH, YIN H, GUAN GQ, SCHNITTGER L, LIU ZJ, MA ML, DANG ZS, LIU JL, REN QY, BAI Q, AHMED JS, LUO JX.
Revista:
VETERINARY PARASITOLOGY
Referencias:
Año: 2007 p. 246 - 251
ISSN:
0304-4017
Resumen:
A fatal disease of sheep and goats in the northern part of China has
been reported to be due to Babesia ovis. However, some characteristics
of the causative agent in recent reports are not in accordance with the
original attributes ascribed to this parasite. Therefore, the 18S small
subunit ribosomal RNA (18S rRNA) genes of a number of Babesia isolates
in China were sequenced and compared with that of other Babesia and
Theileria species in an attempt to clarify their taxonomic position. In
the present study, seven Babesia isolates were collected from distinct
areas of northern China, and the 18S rRNA genes were amplified and
sequenced. The phylogenetic trees were inferred based on 18S rRNA gene
sequences of the Chinese ovine Babesia isolates and some of ovine
Babesia and Theileria species available in GenBank. In the phylogenetic
tree, Babesia sp. isolates from Madang, Tianzhu, Lintan, Ningxian,
Hebei and Liaoning all grouped with B. motasi with 88.2-99.9% identity,
while Babesia sp. Xinjiang grouped in a separate clade between B. ovis
and B. crassa with 79.7-81.2% identity. The results indicated that
there are at least two distinct Babesia species groups-B. motasi and
Babesia sp. Xinjiang, the latter was distinctly different from other
ovine Babesia isolates from China with less than 86.6% identity.