Explain the swab method, Biology

Assignment Help:

Explain the Swab Method?

Swab method is the oldest and widely used method in food and dairy industry and was developed by W.A. Manheimer and T. Ybanez in 1917. A sterile cotton swab is used which is made up of wound cotton head on a 12-15 cm long wooden stick. It is moistened with a sterile rinse solution and used for rubbing the surface to be examined.

Swabbing is the most commonly used method to sample food contact surfaces. It is generally used for surfaces having high contaminant counts. Swab samples can be taken from any surface of the food processing facility like chillers, coolers, freezers, utensils, holding tanks, packaging machines, meat slicers, floor, walls, drains, working table, interior of a pipe or equipment piece etc. and analyzed by plating technique for total plate count. The exposed swab is kept back in the test tube containing a suitable diluent and kept in a refrigerator till used for plating. The organisms in the diluent are counted by SPC or any other method used for enumeration, as discussed earlier. Calcium alginate swabs can also be used in place of cotton swabs. Sterile 0.85% saline can be used to rinse the swab. It is used to hold microbial cell temporarily in stasis so that no change in number occur between the sampling and plating events.


Related Discussions:- Explain the swab method

Define difference between plant systematic and taxonomy, Define Difference ...

Define Difference between Plant Systematic and Taxonomy? Before coming to principles of taxonomy let us discuss the difference between taxonomy and systematic. Systematic is th

Polynephritis in cattle, Polynephritis in cattle Contagious bovine pol...

Polynephritis in cattle Contagious bovine polynephritis is a specific infection of urinary tract of cattle. The causative agent is Corynebacterium renale, a rod shaped gram-po

Define requirement of energy for physical activity, Define requirement of e...

Define requirement of energy for Physical activity? This is the most variable and, after BMR, the second largest component of daily energy expenditure. Humans perform obligator

Antibodies, Antibodies Antibodies are important.tools for detecting and...

Antibodies Antibodies are important.tools for detecting and localising specific molecules in the cells due to their high specificity. The first requirement for this is to produ

How is cancer usually treated, Q. How is cancer usually treated? If the...

Q. How is cancer usually treated? If the cancer is in its initial stage cure is often done by surgical removal of the neoplastic tissue. The Cancers already disseminated are of

Explain treatment of latent tb infection, Treatment of latent tb infection ...

Treatment of latent tb infection The risk of developing clinical tuberculosis is greatest in patients with latent TB who are also infected with HIV or are receiving immunosuppr

State about the halsted reitan battery, State about the Halsted Reitan batt...

State about the Halsted Reitan battery The Halsted Reitan battery, as the procedure came to be known over the years, also has a history. It has been described as a fixed batter

Biotic potential curve and the real population growth curve, Q. What is the...

Q. What is the relationship between environmental resistance and the population growth according to the biotic potential curve and the real population growth curve? The differe

Light and dark reactions, Evidence for Existence of Light and Dark Reaction...

Evidence for Existence of Light and Dark Reactions The process of photosynthesis was known in its bare outline already at the beginning of this century. But the phenomenon wa

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