0
What does the presence of fecal coliform bacteria in a sample of river water suggest?
Wiki User
∙ 12y ago
Somebody (or something) is using the river as a toilet.
Wiki User
∙ 12y ago
Add your answer:
Earn +20 pts
Why few bacteria are found in the human stomach?
I keep bacteria in my stomach, my dr. Prescribe antibiotics & i take it for 15 days, but the bacteria keeps coming back & we don't understand. This time she is requesting a stool sample after i finish the medication.
What tests are used to test for the presence of starch and glucose?
for the starch iodine test is performed in which the starch reacts with iodine to produce dark blue colour which confirms the presence of starch. for glucose benedict's and fehling's test is performed. benedict's test: 1 ml sample is mixed with 1 ml of benedicts solution and the heated upto boiling if the colur changes to brick red then it confirms the presence of glucose fehling's test: similarly 1 ml fehling's solution I & fehling's solution II each in taken together and to it 1 ml of the sample is takenon then heated uptill boiling. if the colour changes to brick red the it confirms the presence of glucose.
Advantages of pour plate method over other methods of bacterial colony?
The purpose of the spread-plate technique is to grow and isolate colonies of bacteria. A sample of bacteria is transferred to the agar plate, an environment that provides nourishment for the bacteria to grow. The bacteria sample is applied to the agar plate which a special streaking technique that dilutes the amount of bacteria in each section of the agar plate continuously. This is because if you just swabbed the bacteria onto the plate with no special technique the colonies would grow very densely together and be difficult to study. The streaking technique gradually dilutes the amount of bacteria in each 'quadrant' of the plate, so the last quadrant should have small, isolated colonies that can be easily studied. The spread plate technique is also used for the eneumeration of aerobic microorganisms from the given sample. This can be done by serial diluting the samples, placing 0.1ml of the diluted sample in the middle of an agar plate and spreading the sample over the surface with a help of an L-rod. After the incubation rhe colonies can be counted.
Science what is a sample taken without bias?
The answer is Random Sample
Why aren't you likely to get lag and death phases in this experiment?
You will not see a lag phase because the bacteria of your sample have already been growing for a period of time and are past that point of the growth curve. You will not see a death phase because the bacteria will not begin to die in substantial enough numbers to initiate the death phase before the 60-90 minute lab period is over.
What is the Excessive numbers of other bacteria in a sample that can interfere with counting coliform is called?
The excessive numbers of other bacteria in a sample that can interfere with counting coliform is called bacterial interference or bacterial overgrowth. This can lead to inaccurate results when trying to quantify coliform bacteria in the sample.
What is a coliform count?
A coliform count is a microbiological assay of the number of coliform-type bacteria living in a certain sample. This is often used as a measure of fecal contamination of water supplies.
What is a coliform count of water?
Coliforms are rod shaped gram negative bacteria that are often in well water. Not all coliform are harmful, but those of fecal origin are very harmful. The lab coliform count determines what type and how many coliform are in a water sample. This result is always marked "fit for human use" or "NOT fit for human use".
What are coliform bacteria?
A coliform count is a microbiological assay of the number of coliform-type bacteria living in a certain sample. This is often used as a measure of fecal contamination of water supplies.
What is sample ALH84001?
•Evidence for life -Presence of small organic compounds called PAHs -Small bacteria-shaped morphologies -Magnetite crystals Mars rock in question
What are acceptable coliform levels in water?
This varies from country to country and possibly even states in US. However in general, drinking water must have NO coliform at all - that is called '0/100ml'Swimming pool water is generally allowed '200/100ml'. Anything other than that is 'high' . In general terms coliform is in almost every pool of water and in almost every well. What we are most concerned about is E coli , which is fecal coliform and is dangerous to humans.If you are in any doubt re E coli in drinking water, then take a sample in a sterilised bottle to your local lab. A lab test is usually about $25 in US/Canada and is well worth it to avoid dysentery and associated illnesses.
Who might use aseptic technique?
microbiologist,biologist and everyone that need to get a clean sample(prevent adding bacteria to the sample).
Are bacteria rod shaped?
The natural water sample contains at least two types of bacteria. Bacilli Bacteria are the rod-shaped bacteria.
Will isolated colonies always be in the second sector on the streak plate?
No. It depends on the number of bacteria present in the initial sample. If the number of bacteria in the initial sample are limited, you may get isolated colonies in the first streak. If the number of bacteria in the sample are high, it may take several streaks before the sample is diluted to the point where isolated colonies are evident.
What could you conclude from a sample of natural water which contains a cluster of sphere-shaped bacteria but no rod-shaped or spiral-shaped bacteria as seen under a microscope?
At least two types of bacteria are contained in the natural water sample.
A small sample taken from the body and placed on a medium to allow bacteria growth is a?
The answer is culture. The culture is the sample of a body secretion that is placed on special media to allow the bacteria to grow. Hope this helps. :)
Is stool test used to find any type of harmful bacteria?
Stool Analysis detects the presence of pathogenic microorganisms such as yeast, parasites, and bacteria which contribute to chronic illness and neurological dysfunction. It provides helpful information about prescription and natural products effective against specific microorganism strains detected in the sample. The test also evaluates beneficial bacteria levels, intestinal immune function, overall intestinal health (presence of occult blood, short chain fatty acids analysis, pH, and mucus) and inflammation markers
