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cfu/ml = (no. of colonies x dilution factor) / volume inoculated

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โˆ™ 2009-10-27 05:08:03
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Q: What is the formula used for counting CFU ml?
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Related questions

What do you mean by enumeration of bacteria?

Enumeration of bacteria is counting the number of viable bacterial cells present in 1g or 1ml of a sample. The bacterial counts are usually expressed in CFU/g or CFU/ml. CFU-Colony Forming Units.

Pasteurized milk is allowed 20000 cfu ml how many colonies would be present if 1ml of a 10 -3 dilution was plated is 20000 cfu ml a health hazard?

20. No it is not a health hazard as raw milk has 50000 cfu/ml and can be consumed by humans.

How do you convert cfu per ml to count per ml?

0,3 IFU/ml

What is 1000 cfu in water colony testing?

1000 colony forming unit/ml in water...500 cfu/ml is considered standard for acceptable drinking water

What does 1000 to 10000 cfu ml gram positive flora mean?

1,000 to 10,000 cfu ml gram positive flora means that the test result came back positive for an infection. These results are often seen in urinary tract infections.

If you have 0.05 ml of an undiluted culture at a concentration of 3.6x10 6 CFU ml You then add 4.95 ml sterile diluent What is the dilution factor and what is the final concentration of cells?

the answer is Zero

What is 1000-9000 cfu ml gram positive cocci?

it is the amount of bacteria in the culture....1000-900 colony forming units per ml

How do i calculate Biologic log reduction?

Microbial load (cfu/g or cfu/ml) can be expressed as log10. So, if you have 100,000 microbes that is 5 log, 10,000 microbes is 4 log, 1,000 is 3 log, 100 microbes is 2 log and 10 microbes is 1 log. Now, if you went from 100,000 microbes cfu/g to 10,000 microbes cfu/g that would be a 1 log reduction (5 - 4 log). If you went from 100,000 to 32,000 that would be a 0.5 log reduction (5 - 4.5 log) and so on. I hope this helps St John Hall

What is S Acin in a urine culture report?

what does a report mean when is say 1,000-10,000 CFU/ml of Gram positive cocci and Gram negative bacilli. Is this a positive culture?

What unit of measurement is used for bacterial colonies?

Many aspects of bacterial colonies may be measured for example colony size or appearance can be useful. The measurement which is perhaps the most useful however, is the colony forming units per ml (or cfu) which indicates how many bacterial cells are present to form colonies on the medium. This is a relatively simple calculation which is done by initially counting the number of colonies present on the medium. this number is then multiplied by the inverse of the dilution used. For example, if the dilution of the bacterial broth was 10-2 and the number of colonies on the medium was 60, then the calculation would be 60 x 102. This result is then divided by the volume of sample used in ml and will give you the number of colony forming units per ml present on the medium. Ben McD

What is the formula for 368 mL?

There is no ' formula ' as such. - It is a volume of something.

What is total viable count of bacteria?

Total Viable Count of bacteria gives a quantitative idea about how much is in a sample. The calculation represents the number of colony forming units (cfu) per g ( or per ml).

What formula due you use to convert ml to L?

1 L = 1000 ml

What is the formula to convert ml to oz?

For a rough count, divide ml # by 28. -It will be close.

Convert ounces to milliliter?

Formula: US fluid ounces x 29.57 = mL Algebraic Steps / Dimensional Analysis Formula ____ fl.oz.*1 l 33.814 fl.oz.*1000 ml 1 l=? ml Direct Conversion Formula ____ fl.oz.*29.57352956 ml 1 fl.oz.=? ml

Convert ml into oz?

Formula: mL x 0.033 = fluid ounces

Show you the formula and how do it?

12,500 mL = ?L

What is the longest streak of losing seasons in ML history?

Make that 18 seasons (1992 - 2010) and counting.

Convert ML to teaspoons?

The conversion formula is: mL x 0.203 = US teaspoons.

What does the h in the chemical formula 194 ng.h over mL stands for?

ng.h/mL = nanogram.hour/milliliter

How do you Convert ml to tablespoons or cups?

Algebraic Steps / Dimensional Analysis Formula ____ ml*1 l 1000 ml*33.814 fl.oz. 1 l*2 tbsp 1 fl.oz.=? tbsp Direct Conversion Formula ____ ml*1 tbsp 14.78676478 ml=? tbsp Algebraic Steps / Dimensional Analysis Formula ____ ml*1 l 1000 ml*33.814 fl.oz. 1 l*1 c 8 fl.oz.=? c Direct Conversion Formula ____ ml*1 c 236.5882365 ml=? c

How do you change milliliter to liters?

Follow the formula below... Algebraic Steps / Dimensional Analysis Formula ____ ml*1 l 1000 ml=? l

How do you convert ml to quarts?

Formula: mL x 0.00105668821 = US quarts

Formula of L TO milliliter?

1 liter = 1000 ml 1 ml = 0.001 L

How do you administrate TCID50 and EID50?

When you mean administrate, does this mean procedure for TCID50 or calculation for use? In calculating for the TCID50 and EID50 of the virus in question, you can either use the Spearman-Karber formula or the Reed amd Muench formula. You will be able to determine the amount of virus per 0.1 ml or 1.0 ml depending on the amount used in the procedure. There are a lot of procedure available in the net for both tests. If the computation is 105 per 0.1 ml then there are 100,000 virus particles in that volume. If you need only 103 per ml then 1.0 ml the original suspension shall be diluted with equal volume of diluent (1.0 ml.)