''Effusibacillus lacus'' is a species of

Gram positive In bacteriology, gram-positive bacteria are bacteria that give a positive result in the Gram stain test, which is traditionally used to quickly classify bacteria into two broad categories according to their type of cell wall. Gram-positive bact ...

, facultatively anaerobic, thermophilic

bacterium Bacteria (; singular: bacterium) are ubiquitous, mostly free-living organisms often consisting of one biological cell. They constitute a large domain of prokaryotic microorganisms. Typically a few micrometres in length, bacteria were among ...

. The cells are rod-shaped and form spores. It was first isolated from freshwater lake sediment from Lake Mizugaki,

Japan Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north ...

. The species name is derived from ''lacus'' (of a lake). The species was among the first grouped into the newly created genus ''Effusibacillus'', along with two other species that were reclassified from ''

Alicyclobacillus ''Alicyclobacillus'' is a genus of Gram-variable, rod-shaped, spore-forming bacteria. The bacteria are able to grow in acidic conditions, while the spores are able to survive typical pasteurization procedures. Overview ''Alicyclobacilli'' are s ...

'', '' E. consociatus'' and '' E. pohliae''. ''E. lacus'' is the

type strain The International Code of Nomenclature of Prokaryotes (ICNP) formerly the International Code of Nomenclature of Bacteria (ICNB) or Bacteriological Code (BC) governs the scientific names for Bacteria and Archaea.P. H. A. Sneath, 2003. A short histor ...

for the genus. The optimum growth temperature for ''E. lacus'' is 50-52 °C, and can grow in the 28-60 °C range. Its optimum pH is 7.25-7.50, and grows in pH range 7.0-8.5.

References

Bacteria described in 2014 Gram-positive bacteria Bacillales {{Bacilli-stub