Detection of biofilm formation by selected pathogens relevant to the food industry
Authors:
L. Šilhová-Hrušková; P. Moťková; D. Šilha; J. Vytřasová
Authors‘ workplace:
Katedra biologických a biochemických věd, Fakulta chemicko-technologická, Univerzita Pardubice
Published in:
Epidemiol. Mikrobiol. Imunol. 64, 2015, č. 3, s. 169-175
Category:
Original Papers
Overview
Objective:
Detection of biofilm formation by microbial pathogens relevant to the food industry and comparison of biofilm formation under different conditions of culture.
Material and methods:
The following microorganisms were selected for the study: Staphylococcus aureus, Listeria innocua, Listeria ivanovii, Cronobacter sakazakii, Cronobacter muytjensii, Arcobacter butzleri, Arcobacter cryaerophilus, Campylobacter jejuni, and Campylobacter coli. To detect biofilm formation the microtiter plate assay, as described by Christensen and culture on stainless steel coupons were used.
Results:
The biofilm forming capacity was confirmed in all microorganisms tested, both on the microtiter plates and stainless steel coupons. Biofilm formation was influenced by the culture medium, material used, and culture duration as well as by the test microorganism. It was found that different species and strains of the same genus differ in biofilm formation. Differences were also found between the collection strains and isolates from the environment. Some bacteria tended to form biofilm more readily on the surface of the polyethylene microtiter plates and less readily on stainless steel coupons while others appeared to have an opposite tendency. Some pathogens were able to increase the planktonic cell density in the initial suspension even by three orders of magnitude within 72 hours while producing plenty of biofilm.
Conclusions:
The study of biofilm formation by high risk pathogens is of utmost importance, not only to the food industry. From the obtained results, it is evident that bacterial biofilms form rapidly (within 24 hours in the present study). Due to their architecture, these biofilms are difficult to eradi-cate, and therefore, it is crucial to prevent biofilm formation.
Keywords:
stainless steel – biofilm – pathogens – planktonic cells – microtiter plate
Sources
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Hygiene and epidemiology Medical virology Clinical microbiologyArticle was published in
Epidemiology, Microbiology, Immunology
2015 Issue 3
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