What is mixed with feces in the stool flotation technique?

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The stool flotation technique employs a flotation solution mixed with feces to aid in the identification and isolation of parasites and their eggs from a stool sample. This technique relies on the principle of density, where the flotation solution has a specific gravity that allows lighter particles, such as eggs and larvae, to float while heavier debris sinks.

Using a flotation solution is essential because it provides the right osmotic balance and density needed for effective separation. This allows for the concentration and clear visualization of any parasites present in the stool, which is crucial for proper diagnosis and treatment.

Other substances mentioned, such as water, alcohol, and oil, do not serve the same purpose in this specific technique. Water may not provide the necessary density to separate lighter particles from denser matter, while alcohol can cause the destruction of some parasites and eggs. Oil, although it has different applications in laboratory processes, does not create the ideal conditions for flotation in this context. Thus, the flotation solution is the correct substance used in the stool flotation technique due to its specialized properties that support parasite recovery.

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