Identifier: cu31924023990744 (find matches)
Title: The diseases of China : including Formosa and Korea
Year: 1910 (1910s)
Authors: Jefferys, W. Hamilton (William Hamilton), 1871-1945 Maxwell, James L
Subjects:
Publisher: London : Bale & Danielsson
Contributing Library: Cornell University Library
Digitizing Sponsor: MSN

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mmon fromKorea, and is extremely pre\alent in Formosa, 44 per cent, in a series of1,000 male patients. With regard to the relati\e frequency of the different worms ourinformation is very unsatisfactory. Whyte, Swatow, reports a mixedinfection from that part of the Kwang-tung Province. Two reports fromAnwhei Pro\ince mention the presence of both worms, and one reporteach from Hunan and Hupeh Province. Otherwise all our reportsmention the presence of the Ankyloslontum ditodcnale only. In Formosa we have so far failed to find anv e\idence of the presenceof Necator despite repeated examinations. The slight differences between the twcj worms will be mentionedbelow. The general type is the same in both. Length of the male about8 mm., of the female about 10 to 12 mm. Colour dirty while, neck alittle bent on itself with terminal mouth. Caudal extremity of femalepointed, of male with a well-marked bursa, and two long fine spicules.The habitat of llie adull worm is the duodenum and jejunum. The
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PATHOLOGY OF ANKYLOSTOML\8IS. 177 egg is unstained and xer)- thin shelled, indeed so thin shelled that evenunder the 1/6 inch objective it shows only a single contour, and is thusquite easily distinguished from an ascaris egg from which the rough sheathhas been torn off. (See Fig. 55.) The eggs when passed already, as a rule,contain a segmented ovum. The size of the egg is about 60 by 40/<. Ifkept in a warm place an embryo rapidly develops and in two or three daysescapes from its shell. The rhabditiform lar^-a \-ery closely resembles thelarva of the Slrongyloides iuleslinalis (See Fig. 71), the difference beingonly able to be detected ))y careful microscopic examination of the head. \ G iPRI 1^-) ■^ ■ r-^c / V Fig. 67,—Ankylostciniura duodenale (life size). Shows some worms adhe?-ent to tlie intestinalmucosa and some free. (By Jejferys.) It should be remembered, however, that while the .4. ditoden-ale lar\anever develops inside the bowel, or in pure faces when passed, that of

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