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The Wandering Itch

A Dermatosis on the Rise

By Deanne Roopnarine

The Wandering Itch


 

Abstract

Cutaneous larva migrans (CLM) is one of the most common dermatoses found in tropical climates caused by a common hookworm that penetrates the epidermal layer of the skin. As travel increases and climates become warmer, there is an indication that there will be an increase in CLM cases, and therefore health care professionals should become familiar with its clinical features. In this directed case study, students follow the progress of “Louise,” a college student who shadows a podiatric physician in his clinic. When a father and son present with the same itchy rash on their feet, Louise is guided by a series of questions away from her initial misdiagnosis of tinea pedis to a correct diagnosis of CLM. Originally designed for a pre-medical anatomy and physiology class or a public health class, the case concludes with students creating a patient education or public health pamphlet on CLM suitable for a doctor’s office or clinic addressing its mode of transmission, signs and symptoms, and prevention. 

   

Date Posted

09/14/2026

Overview

Objectives

  • Identify the causative agents of different types of dermatoses and recognize differences and similarities in signs and symptoms.
  • Determine the efficacy of certain medications.
  • Describe the layers of the skin and determine why CLM larvae cannot penetrate the dermis.
  • Explain the efficacy of topical agents on different types of dermatoses.
  • Draw the life cycle of a particular helminth and define a “dead-end” host.
  • Create a public health pamphlet about the epidemiology of CLM (cutaneous larva migrans). 
  • Learn how to find and utilize resources for diagnosis and treatment.

Keywords

Cutaneous larva migrans; CLM; A. braziliense; dermatosis; dermatoses; hookworm; pruritus; serpiginous track; dead-end host; antihelminth; tinea pedis;

  

Subject Headings

Biology (General)
Public Health

EDUCATIONAL LEVEL

High school, Undergraduate lower division

  

FORMAT

PDF

   

TOPICAL AREAS

N/A

   

LANGUAGE

English

   

TYPE/METHODS

Directed, Discussion

 

 

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