Why is the flotation concentration used less frequently than the sedimentation concentration?
There are several reasons. First, not all parasites will float; therefore, you need to examine both the surface film and the sediment before indicating the concentration examination is negative. Second, the organisms must not be left in contact with the high specific gravity zinc sulfate for too long or protozoa will tend to become distorted, so the timing of the examination is more critical. Also, the specific gravity of the fluid will need to be checked periodically.
Related Questions
- Why can’t all helminth eggs be recovered using the flotation concentration rather than the sedimentation concentration?
- Why is the flotation concentration used less frequently than the sedimentation concentration?
- What specific gravity zinc sulfate should be used for the flotation concentration procedure?
