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Molecular detection and genetic diversity of Leucocytozoon sabrazesi in chickens in Thailand
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Molecular detection and genetic diversity of Leucocytozoon sabrazesi in chickens in Thailand
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Journal Article
Molecular detection and genetic diversity of Leucocytozoon sabrazesi in chickens in Thailand
2021
Overview
Leucocytozoon sabrazesi
is the intracellular protozoa of leucocytozoonosis, which is transmitted by the insect vectors and affects chickens in most subtropical and tropical regions of the globe, except South America, and causing enormous economic losses due to decreasing meat yield and egg production. In this study,
L. sabrazesi
gametocytes have been observed in the blood smears, and molecular methods have been used to analyse the occurrence and genetic diversity of
L. sabrazesi
in blood samples from 313 chickens raised in northern, western and southern parts of Thailand. The nested polymerase chain reaction (nested PCR) assay based on the
cytb
gene revealed that 80.51% (252/313) chickens were positive of
L. sabrazesi
. The phylogenetic analysis indicated that
L. sabrazesi cytb
gene is conserved in Thailand, showed 2 clades and 2 subclades with similarity ranged from 89.5 to 100%. The diversity analysis showed 13 and 18 haplotypes of the sequences from Thailand and from other countries, respectively. The entropy analyses of nucleic acid sequences showed 26 high entropy peaks with values ranging from 0.24493 to 1.21056, while those of amino acid sequences exhibited 5 high entropy peaks with values ranging from 0.39267 to 0.97012. The results; therefore, indicate a high molecular occurrence of
L. sabrazesi
in chicken blood samples with the associated factors that is statistically significant (
p
< 0.05). Hence, our results could be used to improve the immunodiagnostic methods and to find appropriate preventive control strategies or vaccination programs against leucocytozoonosis in order to mitigate or eliminate the harmful impact of this infection on chicken industry.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
