Mbale ya petri ndi chidebe chosaya, chozungulira, chowonekera, komanso chosabala chomwe chimagwiritsidwa ntchito m'ma labotale popanga tizilombo tating'onoting'ono, monga mabakiteriya, bowa, kapena tizilombo tating'onoting'ono. Amatchedwa dzina la amene anayambitsa, Julius Richard Petri.Mbale ya petri nthawi zambiri imapangidwa ndi galasi kapena pulasitiki yoyera, ndipo chivindikiro chake ndi chokulirapo m'mimba mwake komanso chopingasa pang'ono, zomwe zimapangitsa kuti mbale zambiri zisungidwe mosavuta. Chivundikirocho chimalepheretsa kuipitsidwa ndikulola kuti mpweya wokwanira ukhale wokwanira.Zakudya za Petri zimadzazidwa ndi zakudya zopatsa thanzi, monga agar, zomwe zimapereka malo othandizira kukula kwa tizilombo toyambitsa matenda. Mwachitsanzo, mchere wa agar uli ndi zakudya zosakaniza, kuphatikizapo chakudya, mapuloteni, ndi zinthu zina zofunika kuti tizilombo toyambitsa matenda tizilombo toyambitsa matenda tizilombo toyambitsa matenda tizilombo toyambitsa matenda tizilombo toyambitsa matenda tizilombo toyambitsa matenda. Kuyesa kutengeka kwa maantibayotiki: Pogwiritsa ntchito ma antibiotic-impregnated discs, asayansi amatha kudziwa momwe maantibayotiki amagwirira ntchito polimbana ndi tizilombo tating'onoting'ono tating'onoting'ono tating'onoting'ono tating'onoting'ono tating'onoting'ono ta tizilombo toyambitsa matenda. Zakudya ndi chida chofunikira kwambiri m'ma laboratories a microbiology, kuthandiza pakufufuza, kuzindikira, komanso kuphunzira tizilombo tating'onoting'ono.
