Amathumbu akhathalishoni lweSaliva lizinto elikhulu lokusebenza kwisekhela somphilo olubhekisisayo ngoba lingena ukuba amapratshenthi aphumele selektibhile amateste yezinye zezimpahla nokuthi zingene ukusombulula amaswi angaphambili okudingeka kudluliswa kanye nokuhlola umphakathi. Amathumbu athu akhulelwa ngokushesha lokungcono ukusuka isampula lesaliva esifumanekayo kwezicatshuleni. Ngenxa yokuthi kuhlola umphakathi kukhangeleka njengekusebenzisi lokubhekisisa, amathumbu akhathalishoni lweSaliva zakho zakuvumelanga ukuthi kuhlobene kakhulu ngesikhatsi lokuhlola umphakathi ukuze izindiza ezikhulu zikhulwe phambi kokuthi zikhululekiswa.