Maximum Likelihood Method on The Construction of Phylogenetic Tree for Ident...

杨利霞

Maximum Likelihood Method on The Construction of

Phylogenetic Tree for Identification the Spreading of

SARS Epidemic

% m. F9 P' t: W; T# XThere are several phylogenetic tree construction
methods that can be used to illustrate the spread of disease
* ^! v$ \/ o( J! D) k$ ~epidemics. One of the methods used is probability-based
maximum likelihood. This paper explains how to identify the
3 `  `4 f" I& v: vspread of the SARS epidemic in the world using the formation of
phylogenetic trees using the maximum likelihood method. The
output obtained was a description of the spread of SARS virus
with the selection of tree candidates after performing a heuristic
& q. l0 E) C$ p9 osearch of the Stepwise Addition method. The result of the research
showed that the closest distance to the palm civet is GZ 02/18/03
9 J" C/ C& Y. t2 W: `3 Rindicating that the initial spread of the SARS epidemic started
- Y# {/ f# a4 ?  q$ `from Guangzhou.
; B* o7 I$ H# P. ]