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Conclusion In comparison with studies reported elsewhere, the maximum levels of lead in our study were greater. A potential explanation for the lack of correlation with childhood asthma is the large mass of the particles, preventing them from reaching the lower airways. Nevertheless, special attention should be paid to reducing high levels of heavy metals in classroom dust in this area.Background Allergenic arthropods are crucial agents in inducing medically important respiratory diseases like asthma and the inflammation of the respirat