Studying Pathogenic Organisms a5 Look at phylogeny to find closely related organisms, for example S, typhimurium vs One may respond more easily than the other to variety of genetic techniques BIOL 533 Lecture threeBIOL 533 6 Lecture Three Studying Pathogenic Organisms • Look at phylogeny to find closely related organisms; for example: – S. typhimurium vs. – S. typhi One may respond more easily than the other to variety of genetic techniques