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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There are several phylogenetic tree construction
( [+ @; R- i  t" j$ k& Bmethods that can be used to illustrate the spread of disease
! w: R) B2 E) _& j) {5 @epidemics. One of the methods used is probability-based
maximum likelihood. This paper explains how to identify the
3 S( k( B2 O% M- [$ `spread of the SARS epidemic in the world using the formation of
' N! g; C6 O8 C* @phylogenetic trees using the maximum likelihood method. The
$ h/ r# d% u% h" {output obtained was a description of the spread of SARS virus
! ^: `+ k, V3 L* j3 @; B6 l7 Pwith the selection of tree candidates after performing a heuristic
, h1 x: Y) D! G6 N& }3 rsearch of the Stepwise Addition method. The result of the research
showed that the closest distance to the palm civet is GZ 02/18/03
5 R# w  N. E- h$ p) }% aindicating that the initial spread of the SARS epidemic started
from Guangzhou.

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