In direct smears, they may be coccoid, so they can be mistaken for streptococci.
2.
The direct smear technique allows examination of larval motion, helping in the distinction of " D . immitis " from " Acanthocheilonema reconditum ".
3.
Proponents point out that, in direct smears, the cells are not transferred in a representative fashion and that up to 90 % of the material scraped from the cervix may be discarded with the sampling device.
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