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Temperature-dependent membrane fatty acid and cell physiology changes in coccoid forms of Campylobacter jejuni.

Author(s) : HAZELEGER W. C., JANSE J. D., KOENRAAD P. M. F. J., BEUMER R. R., ROMBOUTS F. M., ABEE T.

Type of article: Article

Summary

The effect of temperature and the availability of nutrients on the transition of spiral Campylobacter jejuni cells to coccoid forms was investigated. Ageing of spiral C. jejuni cells in either nutrient-poor or nutrient-rich environments resulted in the formation of nonculturable coccoid cells at 4, 12, and 25 deg C after different periods, with the cells incubated at 4 deg C in nutrient-deficient media remaining culturable the longest. It is concluded that the formation of cocci is not an active process. However, distinctions between cocci formed at different temperatures were observed. Cocci formed at 4 deg C show characteristics comparable to those of spirals, and these cocci may well play a role in the contamination cycle of C. jejuni. However, spiral campylobacters can also play an important role in this cycle, since these cells remain culturable for a long period, especially under nutrient-poor and low-temperature conditions.

Details

  • Original title: Temperature-dependent membrane fatty acid and cell physiology changes in coccoid forms of Campylobacter jejuni.
  • Record ID : 1997-0800
  • Languages: English
  • Source: Appl. environ. Microbiol. - vol. 61 - n. 7
  • Publication date: 1995/07

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