Association between weather seasonality and blood parameters in riverine populations of the Brazilian Amazon
Objective: To analyze the seasonality of blood parameters related to iron homeostasis, inflammation, and allergy in two riverine populations from the Brazilian Amazon. Methods: This was a cross‐sectional study of 120 children and adolescents of school age, living in riverine communities of Porto Vel...
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| Format: | Article |
| Language: | Portuguese |
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Brazilian Society of Pediatrics
2017-09-01
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| Series: | Jornal de Pediatria (Versão em Português) |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2255553617300605 |
| _version_ | 1811193048557682688 |
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| author | Poliany C.O. Rodrigues Eliane Ignotti Sandra S. Hacon |
| author_facet | Poliany C.O. Rodrigues Eliane Ignotti Sandra S. Hacon |
| author_sort | Poliany C.O. Rodrigues |
| collection | DOAJ |
| description | Objective: To analyze the seasonality of blood parameters related to iron homeostasis, inflammation, and allergy in two riverine populations from the Brazilian Amazon.
Methods: This was a cross‐sectional study of 120 children and adolescents of school age, living in riverine communities of Porto Velho, Rondonia, Brazil, describing the hematocrit, hemoglobin, ferritin, serum iron, total white blood cell count, lymphocytes, eosinophils, C‐reactive protein, and immunoglobulin E levels in the dry and rainy seasons. The chi‐squared test and the prevalence ratio were used for the comparison of proportions and mean analysis using paired Student's t‐test.
Results: Hemoglobin (13.3 g/dL) and hematocrit (40.9%) showed higher average values in the dry season. Anemia prevalence was approximately 4% and 12% in the dry and rainy seasons, respectively. Serum iron was lower in the dry season, with a mean of 68.7 mcg/dL. The prevalence of iron deficiency was 25.8% in the dry season and 9.2% in the rainy season. Serum ferritin did not show abnormal values in both seasons; however, the mean values were higher in the dry season (48.5 ng/mL). The parameters of eosinophils, lymphocytes, global leukocyte count, C‐reactive protein and immunoglobulin E showed no seasonal differences. C‐reactive protein and immunoglobulin E showed abnormal values in approximately 7% and 60% of the examinations, respectively.
Conclusion: Hematological parameters of the red cell series and blood iron homeostasis had seasonal variation, which coincided with the dry season in the region, in which an increase in atmospheric pollutants derived from fires is observed. |
| first_indexed | 2024-04-12T00:01:55Z |
| format | Article |
| id | doaj.art-90e9b817411a40f0bbac4645a3585895 |
| institution | Directory Open Access Journal |
| issn | 2255-5536 |
| language | Portuguese |
| last_indexed | 2024-04-12T00:01:55Z |
| publishDate | 2017-09-01 |
| publisher | Brazilian Society of Pediatrics |
| record_format | Article |
| series | Jornal de Pediatria (Versão em Português) |
| spelling | doaj.art-90e9b817411a40f0bbac4645a35858952022-12-22T03:56:12ZporBrazilian Society of PediatricsJornal de Pediatria (Versão em Português)2255-55362017-09-0193548248910.1016/j.jpedp.2017.05.004Association between weather seasonality and blood parameters in riverine populations of the Brazilian AmazonPoliany C.O. Rodrigues0Eliane Ignotti1Sandra S. Hacon2Universidade do Estado de Mato Grosso (Unemat), Faculdade de Ciências da Saúde (FCS), Cáceres, MT, BrasilUniversidade do Estado de Mato Grosso (Unemat), Programa de Pós‐Graduação em Ciências Ambientais, Cáceres, MT, BrasilFundação Oswaldo Cruz (Fiocruz), Escola Nacional de Saúde Pública (ENSP), Departamento de Endemias Samuel Pessoa (DENSP), Rio de Janeiro, RJ, BrasilObjective: To analyze the seasonality of blood parameters related to iron homeostasis, inflammation, and allergy in two riverine populations from the Brazilian Amazon. Methods: This was a cross‐sectional study of 120 children and adolescents of school age, living in riverine communities of Porto Velho, Rondonia, Brazil, describing the hematocrit, hemoglobin, ferritin, serum iron, total white blood cell count, lymphocytes, eosinophils, C‐reactive protein, and immunoglobulin E levels in the dry and rainy seasons. The chi‐squared test and the prevalence ratio were used for the comparison of proportions and mean analysis using paired Student's t‐test. Results: Hemoglobin (13.3 g/dL) and hematocrit (40.9%) showed higher average values in the dry season. Anemia prevalence was approximately 4% and 12% in the dry and rainy seasons, respectively. Serum iron was lower in the dry season, with a mean of 68.7 mcg/dL. The prevalence of iron deficiency was 25.8% in the dry season and 9.2% in the rainy season. Serum ferritin did not show abnormal values in both seasons; however, the mean values were higher in the dry season (48.5 ng/mL). The parameters of eosinophils, lymphocytes, global leukocyte count, C‐reactive protein and immunoglobulin E showed no seasonal differences. C‐reactive protein and immunoglobulin E showed abnormal values in approximately 7% and 60% of the examinations, respectively. Conclusion: Hematological parameters of the red cell series and blood iron homeostasis had seasonal variation, which coincided with the dry season in the region, in which an increase in atmospheric pollutants derived from fires is observed.http://www.sciencedirect.com/science/article/pii/S2255553617300605Iron homeostasisBiomarkersClimate change |
| spellingShingle | Poliany C.O. Rodrigues Eliane Ignotti Sandra S. Hacon Association between weather seasonality and blood parameters in riverine populations of the Brazilian Amazon Jornal de Pediatria (Versão em Português) Iron homeostasis Biomarkers Climate change |
| title | Association between weather seasonality and blood parameters in riverine populations of the Brazilian Amazon |
| title_full | Association between weather seasonality and blood parameters in riverine populations of the Brazilian Amazon |
| title_fullStr | Association between weather seasonality and blood parameters in riverine populations of the Brazilian Amazon |
| title_full_unstemmed | Association between weather seasonality and blood parameters in riverine populations of the Brazilian Amazon |
| title_short | Association between weather seasonality and blood parameters in riverine populations of the Brazilian Amazon |
| title_sort | association between weather seasonality and blood parameters in riverine populations of the brazilian amazon |
| topic | Iron homeostasis Biomarkers Climate change |
| url | http://www.sciencedirect.com/science/article/pii/S2255553617300605 |
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