From the standpoint of experiments using animals, based on Brazil’s Federal Law No. Human involvement was limited to the contribution of parasitological diagnosis in case reports, whose photographs were authorized by the patients. The authors of this manuscript did not participate in any clinical activity involving humans. Ī literature review on the subject was conducted, using publications from this group and other scientific articles published in indexed journals in the Latin American and Caribbean Health Sciences database (LILACS), Scientific Electronic Library Online (SciELO), and Index Medicus (MEDLINE). Corroborating Leiper’s, 1909, assumption, a wild felid, Puma concolor, naturally infected by L. It is remarkable that all these organs differ from the digestive tract, the normal habitat of all other ascarides. Different stages of the life cycle (eggs, larvae, and adult worm) have also been found. minor has been found in subcutaneous abscesses in the cervical region, mastoid, rhino-oropharynx, tonsils, auditory meatus, nasal sinuses, lungs, central nervous system, sacral region, eyes, and dental alveoli of humans. Since then, more than 100 cases of purulent abscesses in humans have been reported in different countries in the Americas. He proposed that the finding of parasites in subcutaneous abscesses in humans from Trinidad was remarkable evidence that an animal, other than a human, could be the definitive host for this helminth. At that time, the digestive tract of a carnivore was suggested as the probable habitat for L. Leiper, 1909, a helminthologist at the London School of Tropical Medicine and Hygiene who received specimens of a Nematoda recovered from subcutaneous abscesses of 2 patients from Trinidad (off the coast of South America), was the first to describe Lagochilascaris minor. This paper summarizes the main features of the disease and its etiologic agent, including prevalence, life cycle, clinical course, and treatment. Treatment is often palliative, with recurrence of lesions. Fatal cases have been described in which the parasite was found in the lungs or central nervous system. minor exhibits remarkable ability to migrate through the tissues of its hosts, destroying even bone tissue. Lagochilascariasis is mostly a chronic human disease that can persist for several years, in which the parasite burrows into the subcutaneous tissues of the neck, paranasal sinuses, and mastoid. The natural definitive hosts of this parasite seem to be wild felines and canines. It is remarkable that the majority of cases of human lagochilascariasis in the Americas have been reported in Brazil. Lagochilascariasis is a parasitic disease caused by a helminth of the order Ascaroidea, genus Lagochilascaris that comprises 6 species, among which only Lagochilascaris minor Leiper, 1909, is implicated in the human form of the disease.
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