Observations on Filaria sanguinis hominis in south Formosa / by W. Wykeham Myers.

  • Myers, William Wykeham.
Date:
[1880?]
Catalogue details

Licence: Public Domain Mark

Credit: Observations on Filaria sanguinis hominis in south Formosa / by W. Wykeham Myers. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    I believe, however, that examinations made every quarter of an hour, with the occasional checks I have indicated, are sufficient for the purpose, and therefore, to avoid confusion, I have contented myself with merely noting these. The following are the notes I made, on each occasion specified, of the conditions of the embryos then seen. I would state that on two days I was fortunate enough to secure the presence and assistance of Dr. John Dudley, R.N.; that days i, 2, 3 and 4 were consecutive, but 5, 6 and 7 were taken with intervals between; that where morning and evening observations are recorded they were made on the same day; and that I have, whenever I could persuade the man to allow me, and his duties would permit, tried to verify my former experiments; but that the notes of those given are selected because they were the only ones I have so far been able to get continuously, and besides, the appearances were so very similar as to render further record unnecessary. First Day, 6.15 a.m. : 18 Embryos on Slide.—1st to 5th normal; 6th to 10th languid, stretched out; 10th to 14th normal; 15th weak, stretched out, body bent in distinct folds; 16th very much stretched out, weak, only lower two-thirds of body appears to be moving; 18th normal. 6.30 a.m. : 12 Embryos.—xst to 4th normal; 5th stretched out, decidedly weak; 6th and 7th stretched out, somewhat languid, and pauses between contractions marked; 8th stretched out, languid; 9th to nth normal; 12th very weak, scarcely moving, shrivelled appearance. 6.45 a.m. : 13 Embryos.—1st to 7th apparently normal; 8th stretched out, languid, folds in body well marked and retained during appreciable pause; 9th very weak, stretched round in circle, head only moving occasionally; 10th brisker but decidedly weak; nth and 12th normal; 13th stretched out, lash distinct and moving vigorously, upper part of body much less vigorous. 7 a.m. : 3 Embryos.—1st very weak, stretched out, what little motion there is undulatory; 2nd more vigorous, but stretched out; 3rd normal. Second Day, 7.15 a.m.: 5 Embryos.—1st and 2nd extended, body movements not as vigorous as usual, and more distinctly localised; 3rd, very slight motion at lower extremities, getting less and less under observation, body puckered and shrivelled; 4th, movement only in head, stretched-out body, shrivelled appearance; 5 th, body stretched to full length, slightest movement of lash, which ceased under observation. 7.30 a.m. : 4 Embryos.—1st, semi-convulsive jerks of body, the bends taking place at each movement being distinctly separated by inactive portions of body and apparently deeply indented, as though the body was mbre impressible, retaining the mark until the next movement took place; half stretched out; 2nd apparently as vigorous and well as usual; 3rd, movements much more sluggish, folds very slowly straight- ened out at each jerk, elongating itself, movements apparently involving same bends and folds of body every time; 4th much more vigorous in action, but with marked tendency to elongation, and the pauses between motions well marked. 7.45 a.m. : 4 Embryos.—1st very feeble in its action generally; 2nd extended and markedly feeble, same signs of irregularity in action observed; 3rd lively, and apparently as usual; 4th very feeble, much stretched out, action spasmodic, with marked pauses. Third Day, 6 a.m. : 29 Embryos.—Many lively and apparently well, some very languid, scarcely moving, stretched out, with head and tail touching so as to form a large circle, apparently just dying. 6.15 a.m. : 44 Embryos.—Numbers of them were as usual, but others very much debilitated, body stretched out, and movements decidedly languid. 6.30 a.m. : 9 Embryos.—1st languid, tendency to elongate and form circle by approximation of tail and head, folds and pauses marked, shrivelled; 2nd very similar in condition; 3rd still more feeble, folds in body very marked, giving an appearance as though body would break at each movement; 4th and 5th
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