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

Synapse - nervous system, Synapse   Nervous System Structural feature ...

Synapse   Nervous System Structural feature of unique importance in the nervous tissue is the synapse. A synapse is the anatomical site at which axon terminal processes of one

Agro industrial-packaging, Packaging Compound feeds, whether in mash o...

Packaging Compound feeds, whether in mash or pellet form, are packed in bags or stored in bins. Bags may be filled directly from mixers, pellet coolers or holding bins and wei

Why is complementary base pairing important in dna structure, Why is comple...

Why is complementary base pairing important in DNA structure? Complementary base pairing is important because the hydrogen bonds between the bases hold the two strands of DNA

What microbiology lab technician left the safranin out, If a microbiology l...

If a microbiology lab technician left the safranin out of the Gram stain procedure, what would be the result?

What are SOL, What are sols?  A colloidal system in which solid  partic...

What are sols?  A colloidal system in which solid  particles are dispersed in a liquid is referred to as a sol, to distinguish it from a true solution. In a true solution, the

Define observation or inference for mucic acid test, Define Observation or ...

Define Observation or Inference for Mucic Acid Test? 1. White crystals of mucic acid will be seen. 2. The sugar solution contains galactose. 3. Lactose gives this test, s

Role of private sector in health care - contracting, Role of Private Sector...

Role of Private Sector in Health Care - Contracting The government can transfer some of its work to the private sector by contracting. If the cost of resultant services (inclu

Diploidy and haploidy, Diploidy and Haploidy :: In the chromosomal complem...

Diploidy and Haploidy :: In the chromosomal complement  given species  not all the  chromosomes are different  from each other .In fact these  are in pairs ,i.e.  every  two chrom

ALGAE., HOW ARE THE ORIGIN AND EVOLUTION OF ALGAE..

HOW ARE THE ORIGIN AND EVOLUTION OF ALGAE..

Biomolecules, How do you explain in the absence of aldehyde group in the pe...

How do you explain in the absence of aldehyde group in the pentaacetate of D-glucose? Ans) when you react glucose with acetic anhydrate it forms pentaacetate with 5 OH grops it tel

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