Structure

Lactobacillus Thermophilus is a Rod Shaped bacteria. 

It consists of spore forming rods that average 1.0 by 3.5 microns in milk culture. 

However, in a broth culture the bacteria cells are notable longer in length, ranging from 2.5 to 6 microns.

The rods have a natural Straight or Slightly Curved structure to them.

Lactobacillus Thermophilus arranges in single cells as well as long chains of cells depending on the environment it is present in.  Shorter chains and pinpoint colonies of single celled bacteria are present in the milk cultures, while longer chains are commonly seen in the broth cultures.

Lactobacillus Thermophilus is a Non-Motile Bacteria.  This means that it cannot move in its environment, rather, it moves with its environment.

The classification name of Bacilli implies that Lactobacillus Thermophilus is a Rod Shaped bacteria.  Bacilli also implies that it is Gram-Positive because every member of the Bacilli class is as stated.

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