Climate change is significantly altering the dynamics of airborne allergens, affecting their seasonality, allergenicity, and geographic distribution, which correlates with increasing rates of allergic diseases. This study investigates aeroallergen sensitization among populations from Tenerife, Spain, and Lima, Peru—two regions with similar climates but distinct socio-economic conditions. Our findings reveal that Spanish individuals, particularly those with asthma, demonstrate higher sensitization levels to a broader range of allergens, especially mites, with 85% of participants reacting to at least one mite allergen. In contrast, Peruvian patients exhibit a narrower spectrum of sensitization. These results highlight the influence of environmental factors, such as pollution and socio-economic disparities, on allergen exposure and immune responses. Moreover, this study underscores the necessity for region-specific diagnostic and therapeutic strategies to effectively address these variations. By elucidating the intricate relationship between climate change, environmental factors, and allergen sensitization, this research offers insights into respiratory allergic conditions, advocating for tailored interventions to mitigate their impact across diverse populations.

Background. The Peruvian Immunoblot panel, together with traditional skin prick tests (SPT), are widely used in vitro allergy tests in Peru. In addition to this, Peruvian allergists are increasingly adopting multiplex tests such as the ALEX‐2 (Macro Array Diagnostics). Previous studies have revealed limited agreement between Immunoblot and SPT results. Therefore, our study aimed to evaluate the concordance between these three tests in patients with allergic rhinitis (AR) in a private center in Arequipa, Peru. Materials and Methods. We enrolled 35 patients, including children over 3 years and adults, with AR. Clinical and demographic data were collected, and patients underwent allergic sensitization testing using the Immunoblot Peruvian panel (32 allergens), ALEX‐2 (295 allergens), and SPT (12 allergens). Concordance was calculated using Cohen’s kappa coefficient and analyzed with IBM SPSS V26. Results. Among the patients, 34.3% exhibited moderate‐to‐severe persistent AR, and 14.3% had asthma. Additionally, 85.7% reported a family history of AR. Sensitization rates varied notably between the SPT and ALEX‐2, particularly for olive pollen (34.3% vs. 17.4%), Blomia tropicalis (11.4% vs. 17.1%), and grasses (11.4% vs. 28.5%). Remarkably, these allergens were not included in the Peruvian Immunoblot panel. Concordance analysis included seven allergens and showed significant concordance between ALEX‐2 and SPT for five allergens, between Immunoblot and SPT for two allergens, and between ALEX‐2 and Immunoblot for two allergens. Conclusion. This preliminary study shows us a better concordance between ALEX‐2 and SPT rather than between Immunoblot and SPT.

Objetivo: Identificar y registrar las esporas de hongos más importantes captadas en nuestra estación de aerobiología, además reportar la prevalencia de sensibilización cutánea a estos alérgenos. Métodos: La identificación y los conteos de esporas de hongos se realizaron según la técnica estandarizada con un equipo colector Burkard Spore Trap For Seven Days, siguiendo las recomendaciones de la National Allergy Bureau (NAB), de la American Academy Allergy Asthma and Immunology (AAAAI). El equipo se instaló a 20 m de altura desde el nivel del suelo, en la azotea de la Clínica SANNA El Golf, distrito de San Isidro, (12°5'54"S 77°3'6"O), en la zona sur-oeste del área urbana de Lima. El periodo de captación se llevó a cabo entre septiembre de 2020 y octubre de 2021. Se realizaron estudios de pruebas cutáneas (skin prick-test), según recomendaciones de la Sociedad Española de Alergología e Inmunología Clínica (SEAIC), en 200 pacientes (entre 18 y 60 años), con sintomatología de rinoconjuntivitis y/o asma. Fueron evaluados en el servicio de Alergología de la Clínica SANNA El Golf. Se aplicaron extractos alergénicos de ácaros del polvo (Dermatophagoides pteronyssinus, Dermatophagoides farinae, Blomia tropicalis), epitelios de gato y perro, Periplaneta americana, mezclas de seis gramíneas, mezclas de malezas, hongos ambientales (Cladosporium herbarum, Alternaria alternata, Aspergillus fumigatus, Penicillium notatum, Nigrospora spp.), extractos del laboratorio INMUNOTEK-España. Además, testeamos otros alérgenos fúngicos de Fusarium spp, Stemphylium spp, Curvularia spp, una mezcla de Helmintosporum/Dreschlera spp. del laboratorio DIATER-Argentina. Resultados: Identificamos esporas de Alternaria alternata, Cladosporium spp., Nigrospora spp., Stemphylium spp., Fusarium spp., Curvularia spp., Dreschlera/Helmintosporum spp. Los pacientes mostraron sensibilización a Cladosporium herbarum (14%), Fusarium spp. (13,5%), Nigrospora spp. (8%), Alternaria Alternata (7%), Stemphylium (6%), Dreschlera/Helmintosporium spp. (5,5%), Curvularia spp. (3%) y Aspergillus fumigatus (2,5%). Conclusiones: Los habitantes de la zona sur-oeste de la ciudad urbana de Lima están expuestos a distintas esporas de hongos con potencial alergénico, identificándose mayor concentración durante los meses de verano y otoño. Se demuestra sensibilización cutánea en porcentajes variables a las esporas fúngicas identificadas en este muestreo aerobiológico. Los resultados de este estudio deberían ampliarse y ser comparados con data en los años siguientes, identificar fluctuaciones estacionales y anuales y extender los captadores a otras locaciones en Lima.

Fungal spore calendars help illustrate the abundance and distribution of spores throughout the year, enabling clinicians and patients to predict and treat allergic symptoms based on spore presence and concentration. This three-year study (2021–2024) established the first fungal spore calendar for the most clinically important spore types in Lima, Perú: Alternaria, Cladosporium, Nigrospora, Curvularia, Drechslera, Fusarium, and Stemphylium. Air sampling was performed using a Burkard volumetric spore trap placed on the rooftop of SANNA Clínica el Golf in San Isidro, Lima. Cladosporium was the most abundant (37,945 spores/m³), followed by Nigrospora (11,558), Curvularia (3946), Fusarium (2454), Alternaria (2138), Drechslera (1850), and Stemphylium (201). The highest concentrations of Alternaria, Nigrospora, Curvularia, and Drechslera were recorded in 2023–2024, with seasonal peaks mainly during spring/summer. Meteorological correlations showed that Alternaria, Cladosporium, Nigrospora, and Curvularia were positively correlated with temperature while Drechslera had a negative correlation. Cladosporium, Curvularia, Fusarium, and Stemphylium were negatively correlated with relative humidity, while other types showed a mix of both positive and negative responses or inverse responses. These two meteorological parameters are likely the main influences on spore concentrations; however, other factors may include other meteorological parameters. Cladosporium correlated positively with southwesterly winds, and negatively with northwesterly, winds, and Curvularia was positively correlated with northeasterly winds.

Allergic diseases, particularly respiratory allergies like asthma and allergic rhinitis, are a growing public health concern influenced by environmental factors such as climate change and air pollution. The exposome framework enables a comprehensive assessment of how lifelong environmental exposures shape immune responses and allergic sensitization. Peru’s diverse ecosystems and climates provide a unique setting to investigate regional variations in allergic sensitization. This study characterized these patterns in five Peruvian regions with distinct climatic, urbanization, and socioeconomic characteristics. A total of 268 individuals from Lima, Piura, Tarapoto, Arequipa, and Tacna were analysed for allergen-specific IgE responses using a multiplex IgE detection system. The results revealed significant geographical differences in sensitization frequencies and serodominance profiles, based on descriptive statistics and supported by Chi-square comparative analysis. House dust mites were predominant in humid regions, while Arequipa exhibited higher sensitization to cat allergens. In Tacna, olive pollen showed notable prevalence alongside house dust mites. Tarapoto’s high humidity correlated with increased fungal and cockroach allergen sensitization. Notably, some allergens traditionally considered minor, such as Der p 5 and Der p 21, reached sensitization prevalences close to or exceeding 50% in certain regions. These findings provide the most detailed molecular characterization of allergic sensitization in Peru to date, highlighting the importance of region-specific allergy management strategies. Understanding environmental influences on allergic diseases can support more effective diagnostic, therapeutic, and preventive approaches tailored to diverse geographical contexts.

El cambio climático es uno de los principales fenómenos que están ocurriendo y son responsables por emergencias sanitarias en todo el mundo. El cambio climático ha determinado un aumento en el número de incendios forestales, debido a la combinación de condiciones cálidas y secas, con vientos, deforestación e intervención humana. Los incendios forestales, provocados por causas naturales o antropogénicas, son considerados una de las perturbaciones naturales más extendidas en los ecosistemas forestales del mundo. Se estima que la exposición al material particulado PM2,5 liberadas durante los incendios forestales se encuentran asociado a 0,68 millones de muertes/año, la mayoría de ellas en niños menores de cinco años. El transporte de PM2.5 relacionado con los incendios forestales es de gran alcance y contribuye a la mala calidad del aire incluso después de las temporadas de incendios. La actividad de incendios forestales en 2021-2022 en algunas regiones del mundo fue en una escala mucho mayor que la vista anteriormente en el conjunto de datos del Servicio de Monitoreo de la Atmósfera de Copernicus (CAMS). Así, este documento presenta diferentes informes sobre incendios forestales ocurridos en diversas partes del mundo, especialmente en América Latina, durante los años 2019-2022.