Question

write the provedure to observe lactoba cillus in the laboratory​

Answer 1

Lactobacillus is a most commonly found bacteria in milk, yogurt and other dairy products. They are rod shaped, non-spore forming, gram positive bacteria. We can observe them by making a slide of yogurt: -Take a glass slide and put a drop of diluted yogurt on it, make a smear for 2 to 3 secs on the slide.

Answer 2

Answer

The procedure that we performed to observe Lactobacillus bacterium to be observed in the laboratory is:

• First, we take some warm milk in a bowl then we add a small amount of curd into it and keep it in an area slightly warmer.

• Then leave it for some time.

• Then after the curd is formed dilute it and then we stain the bacteria by methylene blue or safranin to see the bacteria as it is colorless.

• Then we prepare the slide and observed the bacteria under a microscope.

The bacteria are rod-shaped or cocci shaped.

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