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

0 s" J! {( X; S4 T) ]) @
There are several phylogenetic tree construction
3 v; r3 s0 P4 J/ V5 C' U1 F6 Z8 Tmethods that can be used to illustrate the spread of disease
epidemics. One of the methods used is probability-based
, q1 n" c/ Y% Smaximum likelihood. This paper explains how to identify the
& `+ c. v4 p3 m) y8 ~9 w8 Gspread of the SARS epidemic in the world using the formation of
4 v/ j: d5 n# Y7 {% d! L( m* [phylogenetic trees using the maximum likelihood method. The
4 t% w; U% `0 o7 Q, R( a) Houtput obtained was a description of the spread of SARS virus
with 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
2 w3 s- h% i0 `+ Yindicating that the initial spread of the SARS epidemic started
* r8 ]) @( f* c- Y% Lfrom Guangzhou.
5 ~5 r, R& t0 E/ P" i

' P0 d$ X, ?5 a, Z
, H5 i  f  @( X% b1 V