Explain the primary stain - ziehl-neelsen method, Biology

Assignment Help:

Explain the Primary Stain - Ziehl-Neelsen Method?

Ordinary aqueous stains like methylene blue, crystal violet, etc. are not able to stain most of the species of Mycobacteria. Carbol fuchsin, a red mixture of basic fuchsin and phenol can be used for staining these bacteria. Basic fuchsin, binds to carboxylic acid group of mycolic acid and phenol enhances penetration of basic fuchsin into lipid. Penetration is further enhanced by slow heating to steaming for 2-3 minutes. This drives the stain inside the cytoplasm. In modified Ziehl-Neelsen method, instead of heating, a wetting agent - Turgitol - can be added to the stain. This agent reduces surface tension between the cell wall of the mycobacteria and the stain. After staining, all cells become red.


Related Discussions:- Explain the primary stain - ziehl-neelsen method

What is the absolute pressure at the bottom of the container, A container i...

A container is filled to a depth of 20.0 cm with water. On top of the water floats a 30.0-cm-thick layer of oil with specific gravity 0.700. What is the absolute pressure at the bo

Symptoms of constipation, Q. show the Symptoms of constipation? Have yo...

Q. show the Symptoms of constipation? Have you ever suffered from constipation? Do you recall the symptoms associated with the problem? Yes, the symptoms were specific to havin

Biting mechanism of snakes, i want to know the contents which i should writ...

i want to know the contents which i should write in my assignment..related to the above topic..

Excretory system - ureters, URETERS From hilum of each kidney emerge...

URETERS From hilum of each kidney emerges out a tube. Wall is thick. Lumen is star shaped. 28 cm. long. Transitional epithelium present in wall. Open in to urinary bla

Workgroup, Workgroup A Workgroup is a group of people who are working ...

Workgroup A Workgroup is a group of people who are working together on the same project. The members of such a group are usually (not always) located in close physical proximi

Explain about the alitame - artificial sweeteners, Explain about the Alitam...

Explain about the Alitame - artificial sweeteners? Alitame (L-α-aspartyl-N-(2, 2, 4, 4-tetramethyl-3-thietanyl)-D-alaninamide), as illustrated in figure, is a sweetener based o

Preparation for resuscitation, PREPARATION FOR RESUSCITATION Two train...

PREPARATION FOR RESUSCITATION Two trained, personnel capable of working together to perform all aspects of resuscitation, it may be nurse and paediatrician or two skilled nurs

What is hemoglobin s, Question 1 What is megalobastic anemia? Discuss brie...

Question 1 What is megalobastic anemia? Discuss briefly its lab diagnosis. How would you differentiate megaloblastic anemia from other anemias? Question 2 What is hemog

Preparation of the laboratory samples, Q. Preparation of the Laboratory Sam...

Q. Preparation of the Laboratory Samples From the primary sample while selecting a representative laboratory sample, we need to consider the following: a) Laboratory sampl

Nutritional management of food allergies & food intolerance, Define Nutriti...

Define Nutritional Management of Food Allergies and Food intolerance? In this unit we will be discussing the adverse reactions associated with food. You may have read or heard

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd