blomia tropicalis
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2021 ◽  
Vol 18 (3) ◽  
pp. 9-21
Author(s):  
Dumar Alexander Jaramillo-Hernández ◽  
Luz Myriam Tobón-Borrero ◽  
Oscar Javier Herrera-Parra ◽  
Carolina García-Castañeda
Keyword(s):  

Introducción: Las exposiciones frecuentes o estacionales a helmintos que no provocan infecciones crónicas se asocian a un aumento de la inflamación alérgica, situación que podría extrapolarse a la toxocariasis humana. El objetivo de esta investigación fue determinar la frecuencia de seropositivos a Toxocara spp. entre estudiantes atópicos y la relación entre atopia y seropositividad a Toxocara spp. Materiales y métodos: Estudio observacional transversal donde por conveniencia se seleccionaron 90 estudiantes de los programas de Enfermería, Regencia en Farmacia y MVZ de la Universidad de los Llanos que según diligenciamiento del cuestionario ISAAC fase III se presume sufren de enfermedad atópica; para desarrollar en ellos la prueba de hipersensibilización alérgica cutánea (PHAC), utilizando extractos de Blomia tropicalis y Dermatophagoides pteronyssius. En los estudiantes positivos a esta prueba, se tomaron muestras sanguíneas para el recuento de eosinófilos e inmunoensayo in-house para IgG anti-Toxocara spp. Resultados: De los 90 estudiantes con antecedentes de enfermedad atópica, solo el 33,3% fueron positivos para uno o ambos ácaros del polvo en la PHAC y su recuento de eosinófilos en sangre fue normal 66,6%, medio 26,7% y moderado 6,7%. La frecuencia de seropositividad a Toxocara spp. fue del 73,3% (DO 1,009 cut-off). La OR entre atopia y seropositividad a Toxocara spp. fue 1,18 (IC95% 0,24-5,7). Discusión: Colombia es uno de los países con alta endemicidad de toxocariasis con prevalencias entre 40.4–54.4%, dato confirmado según la frecuencia de seropositivos a Toxocara spp. encontrada en personas atópicas en estudio. Conclusiones: No se encontró relación entre atopia y seropositividad a Toxocara spp.


2021 ◽  
Vol 2 ◽  
Author(s):  
Elizabeth Maria Mercer Mourao ◽  
Nelson Augusto Rosario

Background: Conjunctival provocation test (CPT) is used to demonstrate clinical relevance to a specific allergen. Blomia tropicalis (Bt) is a prevalent allergen in tropical regions. Its major allergen Blo t 5 is commonly detected in house dust in Brazil. Patients with allergic rhinoconjunctivitis (ARC) have IgE antibodies to Bt although it may not indicate clinical allergy.Objective: The purpose of this study is to demonstrate the role of CPT in clinical allergy to Bt in allergic conjunctivitis (AC).Methods: CPT was performed in asymptomatic subjects with ARC (n = 26) outside the grass pollen season. They had positive skin prick tests (SPT) to Bt and other common inhalant allergens and they were off topical or systemic antihistamines. Standardized allergens were used for CPT (Blo t 5 462.5 ng/mL in 1:1 solution, Alk Abelló). CPT was conducted on a control group of subjects (n = 29) without symptoms of ARC and with negative SPT. CPT was performed with progressive doses of allergen solutions in normal saline (1:32, 1:16, 1:8, 1:4, 1:2). CPT with the same allergen dose that elicited a positive reaction was repeated one week later. The protocol was approved by the local Ethics Board and signed informed consent was obtained from all participants.Results: There were 92% (24/26) of positive CPT in subjects sensitized to Bt. Significant association was found between SPT and CPT results with Bt (p < 0.0001). CPT had 92% sensitivity and 100% specificity when compared to SPT results. Positive reactions with the same dose or one immediately higher occurred in 21 out of 22 subjects who repeated TPC 1 week later. Mild transient nasal symptoms (21/24) were the major side effects of positive CPT followed by moderate periorbital edema which occurred in 41% (10/24). One controlled asthmatic BT-sensitized subject developed wheezing and dyspnea during a positive CPT with Bt that cleared with inhaled albuterol (400 mcg). There were no reactions whatsoever of CPT in non-allergic subjects.Conclusion: This study demonstrated that Bt may cause allergic conjunctivitis in our population. In addition, CPT is a safe and reproducible test if standardized allergens are used.


Author(s):  
Eduardo Santos da Silva ◽  
Luis Gustavo Carvalho Pacheco ◽  
Antônio Márcio Santana Fernandes ◽  
Claudia Asam ◽  
Elisânia Fontes Silveira ◽  
...  

2021 ◽  
Vol 62 (3) ◽  
pp. 189-195
Author(s):  
Cindy Sandí-Villalobos ◽  
Daniela Jaikel-Víquez ◽  
Olman Riggioni-Cordero

Antecedentes: en la consulta de Alergología se realiza un tamizaje rutinario con diversos alergenos, entre ellos: mohos, alimentos, cucarachas y ácaros, que logra diagnosticar a gran parte de los pacientes atendidos. Sin embargo, hay individuos con síntomas de alergia que resultan negativos en las pruebas por punción con los alergenos disponibles en el mercado. Las trampas de luz UV que se colocan en el Valle Inter-montano Central de Costa Rica para mosquitos muestran una gran cantidad de captura de lepidópteros nocturnos, lo que motivó a pensar en la importancia de la alergenicidad de este género de nivel de la región tropical húmeda.Objetivos: determinar el porcentaje de pacientes sensibilizados a los lepidópteros nocturnos y dar a conocer la importancia de estos insectos como alergenos ambientales.Material y método: análisis retrospectivo de los expedientes de la Sección de Alergología de la Clínica Médica Herediana, Heredia, Costa Rica, de febrero de 2011 a febrero de 2012 para determinar el porcentaje de pacientes alérgicos a los lepidópteros nocturnos, a los ácaros de polvo doméstico (Blomia tropicalis, Dermatophagoides pteronyssinus, Dermatophagoides farinae y Tyrophagus putrescentiae) y a insectos (Periplaneta americana y Musca domestica). A su vez, se analizaron los aspectos demográficos y los síntomas de los pacientes. Resultados: se incluyeron 347 pacientes (217 mujeres y 130 hombres, 36.32 ± 18.10 años). El 63% de los pacientes eran alérgicos a los ácaros del polvo doméstico, 39% a los lepidópteros nocturnos, 28% a Periplaneta americana y 24% a Musca domestica. El 2% de los pacientes alérgicos a sólo un alergeno estaba monosensibilizado contra los alergenos de los lepidópteros nocturnos.Conclusión: se recomiendan las pruebas continuas de alergia a lepidópteros nocturnos, porque son los insectos a los que la mayoría de los pacientes estudiados tuvo alergia.


Author(s):  
Silva Francisca das Chagas Sobral ◽  
Silva Daniel Vasconcelos R ◽  
Matos Anderson Bruno ◽  
Salgado Andrea Medeiros ◽  
Queiroz Maria

Cytokine X ◽  
2020 ◽  
Vol 2 (3) ◽  
pp. 100032
Author(s):  
Gerson de A. Queiroz ◽  
Raimon R. da Silva ◽  
Anaque de O. Pires ◽  
Ryan dos S. Costa ◽  
Neuza M. Alcântara-Neves ◽  
...  

2020 ◽  
Vol 25 (8) ◽  
pp. 1444-1460
Author(s):  
Qing-Hai Fan ◽  
Shivana Sweta Dayal ◽  
Hatch Michael Fong ◽  
Panapasa Rakuita ◽  
Jainesh Anish Ram

We recently had the opportunity to collect some mite samples in Viti Levu and Vanua Levu of Fiji and found a couple of dozens of species. In this paper we present 32 species in three orders—Mesostigmata: 15 species in 11 genera in 9 families; Sarcoptiformes: 13 species in 13 genera in 10 families; Trombidiformes: 4 species in 4 genera in 3 families. The following 22 species are recorded for the first time from Fiji: Ameroseius womersleyi in Ameroseiidae, Lasioseius cuppa, L. latinoamericanus, L. pellitus  and L. penicilliger in Blattisociidae, Androlaelaps casalis in Laelapidae, Proctolaelaps aurora in Melicharidae, Propriosiopsis ovatus and Typhlodromus (Anthoseius) transvaalensis in Phytoseiidae; Funkotriplogynium ovulum in Triplogyniidae, Uroactinia hippocrepea in Uroactiniidae, Neotropacarus mumai and Schwiebea zingiberi in Acaridae, Glycycometus weelawadjiensis in Aeroglyphidae, Blomia tropicalis in Echimyopodidae, Pergalumna (P.) hawaiiensis hawaiiensis in Galumnidae, Nasozetes sumatrensis in Hemileiidae, Dermatophagoides pteronyssinus in Pyroglyphidae, Sudasia pontifica in Suidasiidae, Oulenziella bakeri in Winterschmidtiidae, Dactyloscirus smileyi in Cunaxidae, Tarsonemus rakowiensis in Tarsonemidae.


Acarologia ◽  
2020 ◽  
Vol 60 (3) ◽  
pp. 576-586
Author(s):  
Juan J. Lezcano ◽  
Ingrid L. Murgas ◽  
Olga M. Barrera ◽  
Roberto J. Miranda

The name “house dust mites” is commonly used to refer to species of mites belonging mainly to the Pyroglyphidae family (Astigmata) that are found in association with dust in the human dwellings. They represent the main source of allergens in the home and can cause allergic diseases. Mattresses often provide ideal conditions for mite colonization. In order to compare the diversity of house dust mites in the provinces of Panama and Panama Oeste in 2015, we collected dust from the surfaces of mattresses over an area of one square meter using the vacuum method. We obtained 50 samples using the vacuum method and recovered 10,225 mites. We found that the mites in our samples belonged to 15 families, 15 genera and 22 morphospecies. Relatively, high mean densities of mites per gram of dust on mattresses were obtained in the provinces of Panama (3,577 mites/g of dust) and Panama Oeste (6,273 mites/g of dust). The mite Blomia tropicalis was the most abundant species in mattresses in the Province of Panama and Dermatophagoides pteronyssinus was the most frequent one in Panama Oeste. Our results indicate that the mite community in mattresses is similar between PA and PO. However, our results differ significantly from those found in bedroom floors in a previous study. These differences correspond to a lower species richness, higher density and relative abundance of Astigmata mites in mattresses.


2020 ◽  
Vol 124 ◽  
pp. 91-99
Author(s):  
Camile L. S. Alves ◽  
Leonardo F. Santiago ◽  
Marina B. R. Santana ◽  
Barbara C. P. Figueiredo ◽  
Suellen B. Morais ◽  
...  

2020 ◽  
Vol 50 (7) ◽  
pp. 835-847
Author(s):  
Eduardo Santos Silva ◽  
Lorenz Aglas ◽  
Carina Silva Pinheiro ◽  
Emília M. M. Andrade Belitardo ◽  
Elisânia Fontes Silveira ◽  
...  

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