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

SARS Epidemic

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) ]3 V: W8 q1 L1 _0 cThere are several phylogenetic tree construction
# b' S5 K0 c" ^% F) }1 H  I1 Z- gmethods that can be used to illustrate the spread of disease
' J* f1 @+ C6 ?4 F' ^* Bepidemics. One of the methods used is probability-based
maximum likelihood. This paper explains how to identify the
3 w: }. z% d! u, a  V9 z" t# D/ Fspread of the SARS epidemic in the world using the formation of
1 G: V8 J' `9 w; l! ^5 o& tphylogenetic trees using the maximum likelihood method. The
output obtained was a description of the spread of SARS virus
' P* {" {6 G; A0 \' U5 e& _with the selection of tree candidates after performing a heuristic
& F9 l6 F4 \* w8 x; M5 P) asearch of the Stepwise Addition method. The result of the research
showed that the closest distance to the palm civet is GZ 02/18/03
indicating that the initial spread of the SARS epidemic started
" s  a5 m. z/ w8 y! Y  ffrom Guangzhou.

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