How to observe the presence of Lactobacillus in curd?
Understand the Problem
The question is asking about a procedure to observe the presence of Lactobacillus in curd using microscopy and the preparation involved in it. It details the materials required, steps to perform the observation, and includes information about medicinal uses of antibiotics and vaccines.
Answer
Smear diluted curd, heat-fix, stain with crystal violet, rinse, dry, and observe under a microscope for blue-coloured rods.
To observe Lactobacillus in curd: smear diluted curd on a slide, heat-fix it, stain with crystal violet, rinse, dry, and observe under a microscope for blue-coloured rods.
Answer for screen readers
To observe Lactobacillus in curd: smear diluted curd on a slide, heat-fix it, stain with crystal violet, rinse, dry, and observe under a microscope for blue-coloured rods.
More Information
Lactobacillus in curd can be observed under the microscope as rod-shaped, blue-coloured structures after staining with crystal violet or another suitable stain.
Tips
A common mistake is using too much sample on the slide. Ensure to create a thin smear for clear visualization. Proper heat-fixing is crucial to avoid washing off the sample.
