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February 1946

TYPES OF DERMATITIS IN AMERICAN ONCHOCERCIASIS

Author Affiliations

CINCINNATI; HUIXTLA, CHIAPAS, MEXICO

From the Department of Dermatology and Syphilology of the University of Cincinnati College of Medicine and the Centro Médico, Huixtla, Chiapas, Mexico, Dr. Luis Figueroa Ortiz, Director. Work done under the Secretaría de Salubridad y Asistencia Publica; Dr. Manuel Martínez Báez, Subsecretarío; Dr. Salvador González Herrejón, Dirección General de Epidemiologia y Endemiologia; Dr. José Zozáya, Director Instituto de Salubridad y Enfermedades Tropicales; Dr. Anthony Donovan, Chief, Caribbean Sector Pan American Sanitary Bureau, and Dr. Frederic C. Bartter, Medical Officer in Charge of Onchocercosis Investigations, Pan American Sanitary Bureau.

Arch Derm Syphilol. 1946;53(2):79-93. doi:10.1001/archderm.1946.01510310003001
Abstract

IN A previous communication1 the general background of American onchocerciasis was given. In this report an attempt will be made to describe in detail the different forms of dermatitis that were observed, for the most part, at the research center of onchocerciasis, Centro Médico, Huixtla, Chiapas, Mexico. This research hospital has been placed in the state of Chiapas in an area in which onchocerciasis is heavily endemic. The incidence of the disease here has been estimated at 20,000 by González Herrejón.2

It is difficult to analyze critically the cutaneous reactions observed in patients infected by the filariae worm, Onchocerca volvulus, for the following reasons:

  1. Many areas of skin, structurally normal, grossly and even microscopically, and also free of subjective reactions, may show numerous microfilariae in that portion.

  2. The vector of the disease, the Simulium, produces an erythemaedema and petechial reaction, with the intensity of

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