3 research outputs found

    Accidents with caterpillar Lonomia obliqua (Walker, 1855). An emerging problem

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    Lonomia obliqua (Walker, 1855) es una mariposa nocturna de la familia Saturniidae, ampliamente distribuida en selvas tropicales de Sudam茅rica. Su larva (oruga) se caracteriza por poseer esp铆culas ramificadas puntiagudas a lo largo de su cuerpo, que contienen una mezcla compleja de mol茅culas t贸xicas en su interior. Cuando las esp铆culas contactan con la piel de las personas, las toxinas ingresan pasivamente a trav茅s de la lesi贸n, generando un envenenamiento caracterizado por manifestaciones no solo locales sino tambi茅n sist茅micas (fundamentalmente manifestaciones hemorr谩gicas). Debido al elevado n煤mero de casos que se produjeron en Brasil en las 煤ltimas d茅cadas, el Instituto Butantan ha producido un antiveneno capaz de neutralizar los efectos delet茅reos de los accidentes por contacto con L. obliqua. En Argentina, los accidentes por Lonomia son poco frecuentes y se limitan a la provincia de Misiones. Teniendo en cuenta que a la fecha no hay en la literatura descripciones de casos cl铆nicos ocurridos en el pa铆s con tratamiento espec铆fico (antiveneno), el prop贸sito del presente trabajo es comunicar seis casos de accidentes por contacto con orugas Lonomia que fueron atendidos en el Hospital SAMIC de Puerto Iguaz煤 (Misiones, Argentina) durante el a帽o 2014, y que fueron tratados con el suero antilon贸mico producido en Brasil. Se destaca la evoluci贸n r谩pida y favorable de todos los pacientes por lo que se recomienda el uso de este antiveneno para tratar los casos de erucismo por Lonomia en la Argentina.Lonomia obliqua (Walker, 1855) is a moth from the family Saturniidae, widely distributed in tropical rainforests of South America. In its larval stage (caterpillar) it is characterized by bristles that cover the animal's body. These structures are hard and branched spiny evaginations of the cuticle, underneath which a complex mixture of toxic molecules is stored. When spicules are brought into contact with the skin of people, toxins enter passively through the injury, causing not only local but also systemic poisoning (primarily hemorrhagic manifestations). When the whole animal is accidentally crushed, the insect's chitinous bristles are broken and the venomous secretions penetrate the human skin, reaching the blood circulation. Due to the numerous registered cases of erucism in Southern Brazil, the Butantan Institute has produced an antivenom able to neutralize the deleterious effects produced by contact with L. obliqua caterpillar bristles. In Argentina, these kinds of accidents are rare and restricted to the province of Misiones. Taking into account that to date there is no report in this country about clinical cases submitted to a specific treatment (antivenom), our aim is to communicate here six cases of Lonomia caterpillar-induced bleeding syndrome that were treated in the Hospital SAMIC of Puerto Iguaz煤 (Misiones, Argentina) during 2014 with the antilonomic serum produced in Brazil. It is worthy to note that all patients evolved favorably within the first few hours, and for this reason, the use of this antivenom is recommended to treat the cases of Lonomia erucism in Argentina.Fil: Sanchez, Matias Nicolas. Ministerio de Salud. Instituto Nacional de Medicina Tropical; Argentina. Consejo Nacional de Investigaciones Cient铆ficas y T茅cnicas; ArgentinaFil: Mignone Chagas, Mariana. Hospital SAMIC Marta T. Schwarz; ArgentinaFil: Casertano, Sergio A.. Ministerio de Salud. Instituto Nacional de Medicina Tropical; ArgentinaFil: Cavagnaro, Luis E.. Hospital SAMIC Marta T. Schwarz; ArgentinaFil: Peichoto, Mar铆a Elisa. Ministerio de Salud. Instituto Nacional de Medicina Tropical; Argentina. Consejo Nacional de Investigaciones Cient铆ficas y T茅cnicas; Argentin

    T helper type 2 bias and type 17 suppression in primary dengue virus infection in infants and young children

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    Background: The immune response to dengue virus (DENV) primary infection in infants and young children is not well characterized. In Northern Argentina, .90% of the population was DENV-na谋篓ve before the 2009 outbreak, allowing evaluation of age-dependent primary responses to infection. Methods: We conducted a comparative study of the immune response to DENV in 27 infected infants, young children and their mothers. Lymphocyte T helper (Th) 1, Th2, Th17 and in铿俛mmatory responses were assayed in blood during the 2009 DENV-1 epidemic. Results: The immune response to DENV-1 was signi铿乧antly biased to Th2 in infected infants and young children, compared to infants with other febrile illnesses (for IL-4 p,0.001) and to their infected mothers (for IL-4 p,0.01). In addition, IL-17 suppression was observed in the memory response to DENV-1 in infected infants (p,0.01 vs placebo). Conclusion: Age-related differences in the primary response to DENV, characterized by an immature Th2 polarization and Th17 suppression in infants, should be studied further in order to expand our understanding of the mechanism of dengue pathogenesis.Fil: Talarico, Laura Beatriz. Fundaci贸n para la Investigaci贸n en Infectologia Infantil; Argentina. Consejo Nacional de Investigaciones Cient铆ficas y T茅cnicas; ArgentinaFil: Bugna Hortoneda, Jimena. Fundaci贸n para la Investigaci贸n en Infectologia Infantil; ArgentinaFil: Wimmenauer, Vera. Fundaci贸n para la Investigaci贸n en Infectologia Infantil; ArgentinaFil: Espinoza, Marco A.. Hospital San Vicente de Paul; ArgentinaFil: Quipildor, Marcelo O.. Hospital San Vicente de Paul; ArgentinaFil: Hijano, Diego R.. Vanderbilt University. Department of Pediatrics; Estados Unidos. Fundaci贸n para la Investigaci贸n en Infectologia Infantil; ArgentinaFil: Beccaria, Mart铆n. Fundaci贸n para la Investigaci贸n en Infectologia Infantil; ArgentinaFil: Wurster, Victoria. Vanderbilt University. Department of Pediatrics; Estados Unidos. Fundaci贸n para la Investigaci贸n en Infectologia Infantil; ArgentinaFil: Cavagnaro, Luis E.. Hospital SAMIC Iguazu; ArgentinaFil: Martinez, Daniel. Hospital SAMIC Iguazu; ArgentinaFil: Fattore, Gladys. Fundaci贸n Mundo Sano; ArgentinaFil: Batalle, Juan Pio. Fundaci贸n para la Investigaci贸n en Infectologia Infantil; ArgentinaFil: Acosta, Patricio Leandro. Fundaci贸n para la Investigaci贸n en Infectologia Infantil; Argentina. Consejo Nacional de Investigaciones Cient铆ficas y T茅cnicas; ArgentinaFil: Reynoso, Natalia. Fundaci贸n para la Investigaci贸n en Infectologia Infantil; ArgentinaFil: Melendi, Guillermina Amanda. Vanderbilt University. Department of Pediatrics; Estados Unidos. Fundaci贸n para la Investigaci贸n en Infectologia Infantil; ArgentinaFil: Rey, Felix A.. Institut Pasteur. D茅partement de Virologie. Unit茅 de Virologie Structurale; FranciaFil: Libster, Romina Paula. Vanderbilt University. Department of Pediatrics; Estados Unidos. Fundaci贸n para la Investigaci贸n en Infectologia Infantil; Argentina. Consejo Nacional de Investigaciones Cient铆ficas y T茅cnicas; ArgentinaFil: Polack, Fernando Pedro. Vanderbilt University. Department of Pediatrics; Estados Unidos. Fundaci贸n para la Investigaci贸n en Infectologia Infantil; Argentina. Consejo Nacional de Investigaciones Cient铆ficas y T茅cnicas; Argentin
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