Question

which stain is used for observation of lactobacilli

Answer 1

Lactobacillus bulgaricus is gram-positive.

A Gram stain test usually shows differences in the cell walls of bacteria.

Gram-positive bacteria have a thick layer of Peptidoglycan and a thin cell membrane.

This bacteria is also called the yogurt bacteria, and the staining process will also require the use of heat and methylene blue stain.