Premium
The Effect of Electrolytes or Carbohydrates in a Sodium Chloride Deficient Medium on the Formation of Discrete Colonies of Proteus and the Influence of these Substances on Growth in Liquid Culture
Author(s) -
Naylor P. G. D.
Publication year - 1964
Publication title -
journal of applied bacteriology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.889
H-Index - 156
eISSN - 1365-2672
pISSN - 0021-8847
DOI - 10.1111/j.1365-2672.1964.tb05050.x
Subject(s) - swarming (honey bee) , proteus , electrolyte , sodium , osmotic pressure , spore , agar , chemistry , food science , nutrient agar , microbiology and biotechnology , bacteria , biology , biochemistry , escherichia coli , organic chemistry , electrode , gene , genetics
S ummary .Proteus spp. formed discrete colonies on a simple nutrient agar. This lack of swarming was neither a function of electrolyte deficiency nor of low osmotic pressure. If electrolytes and certain carbohydrates were added to such a medium the organism swarmed. Growth studies showed that 0.5% (w/v) NaCl or 2.86% (w/v) dulcitol promoted greater growth than 2.9% (w/v) glucose. Amongst the 9 genera tested only Proteus and Serratia grew better in the presence of NaCl. It is suggested that this growth enhancement is a factor in causing Proteus to swarm.