The particular fine dust in a flower that will fertilizes other plants of the exact same type is pollen. It is the male part pf the plant, equivalent to a good animal’s semen, and is carried within the wind or picked up on the hip and legs of foraging bees and butterflies, and finally lands on the stigma, or even female part, of the plant. Whenever pollen blows into the eyes plus nose of susceptible people, this sets off an allergic reaction.
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The antibodies triggered by this reaction stick to the immune mast cells. This causes the mast cells to release inflammatory chemicals, which lead to hay temperature symptoms. The pollen that causes asthma or hay fever is not, despite the name, from hay at all but from grasses, trees, flowering vegetation and fungi. In Australia, New Zealand and south Africa, grass and woods pollens are the most common source of allergens.
Allergies are not just confined in order to flower pollen, pollen from pines, elm, ash, birch, oak, plantain, sorrel and nettle can also trigger an attack. Similarly, the season is not just restricted to the summer months. Pollen from orchards of apples or plums may trigger hay fever among the nearby population and it is a known fact that florists frequently develop allergies to their products.
In cooler climates, hay fever tends to be a little more common in towns and cities than in countryside areas. For example , in Scandinavia it is more common in the towns, and the same is true in other parts of northern Europe and in Eastern Europe. Italians are twice as likely to suffer from hay temperature if they live in a city as opposed to the countryside. But in dry, arid countries, the reverse tends to be true.