Cov yam ntxwv ntawm cov khoom siv pov tseg thiab cov swabs pov tseg: Cov txheej txheem sau tau siv cov nylon flocking swabs, uas tsis muaj tshuaj lom rau cov kab mob thiab mus txog qib kev kho mob, uas tuaj yeem nce kev sau thiab tso tawm cov qauv mus rau ntau dua.
Dab tsi yog cov yam ntxwv ntawm sampling swabs?
1. Tus naj npawb ntawm cov qauv sau rau ntawm qhov chaw swab tuaj yeem nce los ntawm 20 feem pua rau 60 feem pua.
2. Qhov tso tawm tus nqi ntawm cov qauv sau tau siab tshaj 90 feem pua, uas ua kom muaj kev ntseeg siab ntawm cov txiaj ntsig.
3. Xaiv cov kev khaws cia sib txawv rau ntau hom qauv.
4. Cov qauv tsim tshwj xeeb ntawm cov pas nrig yas yog yooj yim rau kev thauj mus los.
