Baaikirn (黴菌 ; (concept) mold, bacteria, germs harmful to the body), baaikhirn iaqsi si tuix Jidguo ee baikin (黴菌) laai ee goaxlaai-guo, tuliao jixbin-siong "bikhurn" ee iesux, ma pauhaam kokciorng tuix laang iuo hai ee søeakhurn, cinkhurn, kab pvixtok terng bii-sengbut.