RESUMO
House dust mites are common inhalant allergens, which can precipitate atopic disease episodes. The present study revealed presence of four mites. These are Dermatophagoides farinae, D. pteronyssinus, Acheles gracilis and Ornithonyssus bacoti. Population densities of different live adult mites were investigated in different house habitats. In urban houses, pyroglyphid mites were the predominant in bedrooms and D. farinae was the most abundant. A. gracilis was more abundant in living rooms followed by D. farinae then D. pteronyssinus. A. gracilis was the most prevalent in kitchens. While in rural houses, O. bacoti was the most abundant species followed by pyroglyphid mites. Since Dermatophagoides species and A. gracilis were present in numbers high enough to allow their ecological consideration, their seasonal abundance in urban bed-rooms was investigated and revealed that both D. farinae and D. pteronyssinus have two peaks of abundance, one slightly higher in spring and the second in autumn. A. gracilis has two peaks but the higher occurred in autumn and the second in spring
Assuntos
Poeira , Ácaros/classificação , População Urbana , População Rural , Ecologia , Estações do AnoRESUMO
The IL-2 and IL-4 cytokines production represent cellular Th1 and Th2 immune responses respectively were associated with chronic schistosomiasis mansoni [stages 1-4] and chronic toxoplasmosis gondii. In the hepatosplenic schistosomiasis, the level of IL-2 and disease stage increased in parallel [P< 0.05, <0.01, <0.01 and <0.001 in stages 1, 2, 3 and 4 respectively], whereas, IL- 4 was highly significantly increased in stage 1 than control [P < 0.001], then decreased to lower levels. The mean concentrations of IL-2 and IL-4 in patients with T. gondii were higher compared to control being more marked in Th-2 [P < 0.001] versus IL-4 [P < 0.01]. The data indicated that there are patterns of cytokine expression characteristic of type 1 and type 2 responses in vivo, with the ultimate goal of being able to manipulate the response to minimize inflammation and fibrosis for clinical benefit