Evaluation of the Effect of Different Growth Media and Temperature on the Suitability of Biofilm Formation by Enterobacter cloacae Strains Isolated from Food Samples in South Africa
This study evaluated the effects of growth medium, temperature, and incubation time on biofilm formation by Enterobacter cloacae strains. The ability to adhere to a surface was demonstrated using a microtiter plate adherence assay whereas the role of cell surface properties in biofilm formation was...
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| Format: | Article |
| Language: | English |
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MDPI AG
2013-08-01
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| Series: | Molecules |
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| Online Access: | http://www.mdpi.com/1420-3049/18/8/9582 |
| _version_ | 1818160123400421376 |
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| author | Mirriam E. Nyenje Roland N. Ndip Ezekiel Green |
| author_facet | Mirriam E. Nyenje Roland N. Ndip Ezekiel Green |
| author_sort | Mirriam E. Nyenje |
| collection | DOAJ |
| description | This study evaluated the effects of growth medium, temperature, and incubation time on biofilm formation by Enterobacter cloacae strains. The ability to adhere to a surface was demonstrated using a microtiter plate adherence assay whereas the role of cell surface properties in biofilm formation was assessed using the coaggregation and autoaggregation assays. The architecture of the biofilms was examined under scanning electron microscope (SEM). All the strains adhered to the well of the microtiter plate when incubated for 48 h, irrespective of the growth medium and incubation temperature. It was also noted that 90% and 73% of strains prepared from nutrient broth and cultured in brain heart infusion (BHI) broth and tryptic soy broth (TSB), respectively, were able to form biofilms, in contrast to 73% and 60% strains from nutrient agar and cultured in BHI and TSB respectively grown under similar conditions. However, no statistically significant difference was observed when the two methods were compared. The coaggregation index ranged from 12% to 74%, with the best coaggregate activity observed when partnered with Streptococcus pyogenes (54%–74%). The study indicates the suitability of BHI and TSB medium for the cultivation of E. cloacae biofilms, however, temperature and incubation time significantly affect biofilm formation by these bacteria. |
| first_indexed | 2024-12-11T15:56:52Z |
| format | Article |
| id | doaj.art-c1e523532a444f6cb19ce9aec1b9c3bd |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-12-11T15:56:52Z |
| publishDate | 2013-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-c1e523532a444f6cb19ce9aec1b9c3bd2022-12-22T00:59:25ZengMDPI AGMolecules1420-30492013-08-011889582959310.3390/molecules18089582Evaluation of the Effect of Different Growth Media and Temperature on the Suitability of Biofilm Formation by Enterobacter cloacae Strains Isolated from Food Samples in South AfricaMirriam E. NyenjeRoland N. NdipEzekiel GreenThis study evaluated the effects of growth medium, temperature, and incubation time on biofilm formation by Enterobacter cloacae strains. The ability to adhere to a surface was demonstrated using a microtiter plate adherence assay whereas the role of cell surface properties in biofilm formation was assessed using the coaggregation and autoaggregation assays. The architecture of the biofilms was examined under scanning electron microscope (SEM). All the strains adhered to the well of the microtiter plate when incubated for 48 h, irrespective of the growth medium and incubation temperature. It was also noted that 90% and 73% of strains prepared from nutrient broth and cultured in brain heart infusion (BHI) broth and tryptic soy broth (TSB), respectively, were able to form biofilms, in contrast to 73% and 60% strains from nutrient agar and cultured in BHI and TSB respectively grown under similar conditions. However, no statistically significant difference was observed when the two methods were compared. The coaggregation index ranged from 12% to 74%, with the best coaggregate activity observed when partnered with Streptococcus pyogenes (54%–74%). The study indicates the suitability of BHI and TSB medium for the cultivation of E. cloacae biofilms, however, temperature and incubation time significantly affect biofilm formation by these bacteria.http://www.mdpi.com/1420-3049/18/8/9582Enterobacter cloacaebiofilmgrowth mediumcoaggregationautoaggregationtemperature |
| spellingShingle | Mirriam E. Nyenje Roland N. Ndip Ezekiel Green Evaluation of the Effect of Different Growth Media and Temperature on the Suitability of Biofilm Formation by Enterobacter cloacae Strains Isolated from Food Samples in South Africa Molecules Enterobacter cloacae biofilm growth medium coaggregation autoaggregation temperature |
| title | Evaluation of the Effect of Different Growth Media and Temperature on the Suitability of Biofilm Formation by Enterobacter cloacae Strains Isolated from Food Samples in South Africa |
| title_full | Evaluation of the Effect of Different Growth Media and Temperature on the Suitability of Biofilm Formation by Enterobacter cloacae Strains Isolated from Food Samples in South Africa |
| title_fullStr | Evaluation of the Effect of Different Growth Media and Temperature on the Suitability of Biofilm Formation by Enterobacter cloacae Strains Isolated from Food Samples in South Africa |
| title_full_unstemmed | Evaluation of the Effect of Different Growth Media and Temperature on the Suitability of Biofilm Formation by Enterobacter cloacae Strains Isolated from Food Samples in South Africa |
| title_short | Evaluation of the Effect of Different Growth Media and Temperature on the Suitability of Biofilm Formation by Enterobacter cloacae Strains Isolated from Food Samples in South Africa |
| title_sort | evaluation of the effect of different growth media and temperature on the suitability of biofilm formation by enterobacter cloacae strains isolated from food samples in south africa |
| topic | Enterobacter cloacae biofilm growth medium coaggregation autoaggregation temperature |
| url | http://www.mdpi.com/1420-3049/18/8/9582 |
| work_keys_str_mv | AT mirriamenyenje evaluationoftheeffectofdifferentgrowthmediaandtemperatureonthesuitabilityofbiofilmformationbyenterobactercloacaestrainsisolatedfromfoodsamplesinsouthafrica AT rolandnndip evaluationoftheeffectofdifferentgrowthmediaandtemperatureonthesuitabilityofbiofilmformationbyenterobactercloacaestrainsisolatedfromfoodsamplesinsouthafrica AT ezekielgreen evaluationoftheeffectofdifferentgrowthmediaandtemperatureonthesuitabilityofbiofilmformationbyenterobactercloacaestrainsisolatedfromfoodsamplesinsouthafrica |