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

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2 S/ Y5 ?! l, {' o: a- AThere are several phylogenetic tree construction
0 Q8 a" s, N6 o8 `methods that can be used to illustrate the spread of disease
epidemics. One of the methods used is probability-based
# `9 q9 b; g3 m; u0 g; umaximum likelihood. This paper explains how to identify the
) W% z( h: r" n+ `1 @spread of the SARS epidemic in the world using the formation of
6 ?4 w8 i: F& `% E3 hphylogenetic 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
) X* `5 ~# p; f  d- r4 l# zsearch of the Stepwise Addition method. The result of the research
: m. U9 C( S. ^& rshowed that the closest distance to the palm civet is GZ 02/18/03
indicating that the initial spread of the SARS epidemic started
* C* v" u2 `' a! t0 Zfrom Guangzhou.

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