Ugotavljanje sposobnosti prilagoditve listerij na benzalkonijev klorid z določanjem njegove minimalne inhibitorne koncentracije
Povzetek
Bakterije rodu Listeria v živilski industriji predstavljajo težavo zaradi njihove razširjenosti in dobre sposobnosti preživetja v neugodnih razmerah. L. monocytogenes (E. Murray et al. 1926) Pirie 1940 je za človeka patogena bakterija, medtem ko je v živilsko-predelovalnem okolju od listerij najpogosteje prisotne nepatogene bakterije vrste L. innocua Seeliger (ATCC® 33090™) Namen dela je bil določiti, ali se listerije lahko prilagodijo na razkužilo benzalkonijev klorid (BAC). Za prilagoditev smo potrebovali natančno določitev protimikrobne aktivnosti BAC. Z metodo razredčevanja v mikrotitrski ploščici (MTP) smo ugotovili minimalno inhibitorno koncentracijo (MIKMTP) BAC za preiskovane seve. Nato smo z rastnimi krivuljami preverili, ali so tako določene koncentracije zares najmanjše koncentracije BAC, ki vplivajo na rast sevov. Ugotovili smo, da imajo inhibitorni učinek že precej manjše koncentracije BAC kot je MIKMTP, saj so bile minimalne inhibitorne koncentracije določene z rastnimi krivuljami (MIKRK) le 0,1–0,5x MIKMTP. Prilagoditev listerij na BAC smo zato izvedli tako, da smo kot začetno koncentracijo BAC uporabili 0,25x MIKRK. Rezultati so pokazali, da se je kar 50 % sevov uspelo prilagoditi na BAC, in pri sevu L. monocytogenes ŽM500 je bila ta prilagoditev celo trajna. Metoda razredčevanja v mikrotitrski ploščici je uporabna za približno določitev protimikrobne aktivnosti razkužila, medtem ko je za natančnejšo določitev aktivnosti razkužila potrebno le-to določiti z drugo metodo, kot je npr. štetje kolonij na trdem gojišču.
Ključne besede
Celotno besedilo:
PDFLiteratura
Aase, B., Sundheim, G., Langsrud, S., & Rorvik, L.M. (2000). Occurrence of and a possible mechanism for resistance to a quaternary ammonium compound in Listeria monocytogenes. International Journal of Food Microbiology, 62(1-2), 57-63. https://doi.org/10.1016/S0168-1605(00)00357-3
Arias-Moliz, M.T., Ruiz-Linares, M., Cassar, G., Ferrer-Luque, C.M., Baca, P., Ordinola-Zapata, R., & Camilleri J. (2015). The effect of benzalkonium chloride additions to AH Plus sealer. Antimicrobial, physical and chemical properties. Journal of Dentistry, 43(7), 846-854. https://doi.org/10.1016/j.jdent.2015.05.003
Berridge, M. V., Hers,t P. M., & Tan, A.S. (2005). Tetrazolium dyes as tools in cell biology: New insights into their cellular reduction. Biotechnology Annual Review, 11, 127-152. https://doi.org/10.1016/S1387-2656(05)11004-7
Bisbiroulas, P., Psylou, M., Iliopoulou, I., Diakogiannis, I., Berberi, A., & Mastronicolis S.K. (2011). Adaptational changes in cellular phospholipids and fatty acid composition of the food pathogen Listeria monocytogenes as a stress response to disinfectant sanitizer benzalkonium chloride. Letters in Applied Microbiology, 52, 3, 275-280. https://doi.org/10.1111/j.1472-765X.2010.02995.x
Burt, S. (2004). Essential oils: their antibacterial properties and potential applications in foods - a review. International Journal of Food Microbiology, 94(3), 223-253. https://doi.org/10.1016/j.ijfoodmicro.2004.03.022
Gadea, R., Fuentes, M.A.F., Pulido, R.P., Galvez, A., & Ortega, E. (2017). Effects of exposure to quaternary-ammonium-based biocides on antimicrobial susceptibility and tolerance to physical stresses in bacteria from organic foods. Food Microbiology, 63, 58-71. https://doi.org/10.1016/j.fm.2016.10.037
Košmelj, K. (2007). Uporabna statistika. 2. dop. izd. Ljubljana, Biotehniška fakulteta: 239 str. http://www.bf.uni-lj.si/fileadmin/groups/2721/Uporabna_statistika_okt_2007/Uporabna_statistika_01.pdf (januar 2018)
Klančnik, A., Piskernik ,S., Jeršek, B., & Smole Možina, S. (2010). Evaluation of diffusion and dilution methods to determine the antibacterial activity of plant extracts. Journal of Microbiological Methods, 81(2), 121-126. https://doi.org/10.1016/j.mimet.2010.02.004
Klodzinska, S. Priemel, P. A., Rades, T., & Nielsen, H. M. (2018). Combining diagnostic methods for antimicrobial susceptibility testing - A comparative approach. Journal of Microbiological Methods, 144, 177-185. https://doi.org/10.1016/j.mimet.2017.11.010
Korsak, D., & Szuplewska, M. (2016). Characterization of nonpathogenic Listeria species isolated from food and food processing environment. International Journal of Food Microbiology, 238, 274-280. https://doi.org/10.1016/j.ijfoodmicro.2016.08.032
Lepe, J. A., Dominguez-Herrera, J., Pachon, J., & Aznar, J. (2013). Determining accurate vancomycin MIC values for methicillin-resistant Staphylococcus aureus by the microdilution method. Journal of Antimicrobial Chemotherapy, 69(1), 136-138. https://doi.org/10.1093/jac/dkt308
Liu, J.J., Deng, W.J., Yu, M.Q., Wen, R.Z, Yao, S.Z., & Chen, B. (2017). Rapid analysis of benzalkonium chloride using paper spray mass spectrometry. Journal of Pharmaceutical and Biomedical Analysis, 145, 151-157. https://doi.org/10.1016/j.jpba.2017.06.030
Soumet, C., Meheust, D., Pissavin, C., Le Grandois, P., Fremaux, B., Feurer, C., Le Roux, A., Denis, M., & Maris, P. (2016). Reduced susceptibilities to biocides and resistance to antibiotics in food-associated bacteria following exposure to quaternary ammonium compounds. Journal of Applied Microbiology, 121, 1275-1281. https://doi.org/10.1111/jam.13247
Soumet, C., Ragimbeau, C., & Maris, P. (2005). Screening of benzalkonium chloride resistance in Listeria monocytogenes strains isolated during cold smoked fish production. Letters in Aplied Microbiology, 41(3), 291-296. https://doi.org/10.1111/j.1472-765X.2005.01763.x
To, M.S., Favrin, S., Romanova, N., & Griffiths, M. W. (2002). Postadaptational resistance to benzalkonium chloride and subsequent physicochemical modifications of Listeria monocytogenes. Applied and Environmental Microbiology, 68(11), 5258-5264. https://doi.org/10.1128/AEM.68.11.5258-5264.2002
Wu, G., Yang, Q., Long, M., Guo, L., Li, B., Meng, Y., Zhang, A., Wang, H., Liu, S., & Zou, L. (2015). Evaluation of agar dilution and broth microdilution methods to determine the disinfectant susceptibility. The Journal od Antibiotics, 68(11), 661-665. https://doi.org/10.1038/ja.2015.51
DOI: http://dx.doi.org/10.14720/aas.2019.114.1.15
Povratne povezave
- Trenutno ni nobenih povratnih povezav.
Avtorske pravice (c) 2019
##submission.license.cc.by-nc-nd4.footer##
Acta agriculturae Slovenica je odprtodostopna revija, ki objavlja pod pogoji licence Creative Commons Priznanje avtorstva (CC BY).
eISSN 1854-1941