[Skip to Content]
Access to paid content on this site is currently suspended due to excessive activity being detected from your IP address 54.163.173.253. Please contact the publisher to request reinstatement.
[Skip to Content Landing]
Article
November 9, 1912

A QUICK METHOD FOR ACCURATELY DIFFERENTIATING THE SPECIES OF HOOKWORM OF MAN

Author Affiliations

Medical Inspector, U. S. Navy; Instructor in Tropical Medicine, U. S. Naval Medical School WASHINGTON, D. C.

JAMA. 1912;LIX(19):1706-1707. doi:10.1001/jama.1912.04270110120016

This article is only available in the PDF format. Download the PDF to view the article, as well as its associated figures and tables.

Abstract

The most satisfactory method of demonstrating to a student the points of difference between Ankylostoma duodenale and Necator americanus is by showing him the characteristics of the buccal capsule of each species. The difficulty, however, is with properly orienting the worm so that a direct view may be had of the mouthopening. Should a lateral view of the anterior extremity present, it is difficult to point out the anatomic differences.

On applying a cover-glass to a freshly passed worm in salt solution on a slide, it will be found easy to cause the worm to roll about its long axis by gently manipulating the surface of the superimposed cover-glass with an ordinary wooden toothpick. This manipulation can be readily carried on while the specimen is examined on the stage of the microscope with a 2/3 inch objective.

By proper adjustment of the diaphragm the proper amount of light can be

First Page Preview View Large
First page PDF preview
First page PDF preview
×