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ARTICLE |

AN IMPROVED METHOD OF EXTRACTING OVA FROM STOOLS

H. L. McNeil, M.D.
JAMA. 1913;61(18):1628. doi:10.1001/jama.1913.04350190046017.
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Not having seen any mention in the literature of the following method since it was first published by Yavita1 some months ago, and since I have had such excellent results with it, I feel that another mention of it will be of value.

The technic which I have employed for the past four months, slightly modified from Yavita's, is as follows:

A particle of the stool, about the size of a cherry, is placed in a test-tube. To this are added 5 c.c. of a 25 per cent. mixture of antiformin. This is mixed well and warmed over a flame, but not boiled. Five c.c. of ether are then added and the whole shaken well. It is then filtered through one layer of gauze and centrifuged one minute (water centrifuge). Four layers are formed. In the lower layer the eggs are found.

This method is excellent, also, when one

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