The multiplier is 8 times the number of eggs found in a faecal sample of one animal, versus 25 used with the standard 2-chambered slide, when a 26:4 ratio of floatation solution to feces is used. Thus if one egg is found, the resulting EPG is 8. (With the 2-chambered slide it would be 25 EPG). This may be important where very low egg counts are looked for.
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