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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$ r6 o' D, i+ jThere are several phylogenetic tree construction
methods that can be used to illustrate the spread of disease
' y+ @. ?8 A9 P- G( F( s! }- Jepidemics. One of the methods used is probability-based
maximum likelihood. This paper explains how to identify the
7 E0 z8 }9 C4 d* s& r% n, uspread of the SARS epidemic in the world using the formation of
. {5 P4 w1 X/ l1 K& m% W, qphylogenetic trees using the maximum likelihood method. The
8 S) o- c# H* ]$ y! `7 j/ [9 foutput obtained was a description of the spread of SARS virus
1 ?8 e" `5 t7 O5 iwith the selection of tree candidates after performing a heuristic
search of the Stepwise Addition method. The result of the research
showed that the closest distance to the palm civet is GZ 02/18/03
+ j5 A, D9 |1 g* u3 I4 Cindicating that the initial spread of the SARS epidemic started
2 N$ M* G4 R/ a0 m3 W) M/ Vfrom Guangzhou.

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