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

杨利霞

Maximum Likelihood Method on The Construction of

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Phylogenetic Tree for Identification the Spreading of

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SARS Epidemic

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0 Q9 L! o' H' }$ Q% \There are several phylogenetic tree construction
methods that can be used to illustrate the spread of disease
& Q  [8 R' V2 U& v9 A8 a' N% s  e) pepidemics. One of the methods used is probability-based
6 c* w+ i- f6 X' Y1 @- M' cmaximum likelihood. This paper explains how to identify the
* Q9 c, W) s, p2 t3 q  Z0 wspread of the SARS epidemic in the world using the formation of
4 t' m! k8 z; `( Ephylogenetic trees using the maximum likelihood method. The
7 U/ L$ u7 S/ H. Poutput obtained was a description of the spread of SARS virus
with the selection of tree candidates after performing a heuristic
& ~# E; N6 D8 ^, }' q1 x5 }) l+ tsearch of the Stepwise Addition method. The result of the research
4 s0 T; C, s8 a  |# `showed that the closest distance to the palm civet is GZ 02/18/03
indicating that the initial spread of the SARS epidemic started
from Guangzhou.

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