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Birch pollen

Birch (Betula pendula, Betula pubescens) on siin õhus alates april to june, tipp late April to mid-May in the Baltic, the first half of May in southern Finland, and late May to early June in Lapland. Allergeenne potents: high. Ristreageeribapple, pear, cherry, plumja teistega.

See on viiteteave, mitte diagnoos ega ravikava. Õietolmukalender ei ütle, millele te allergiline olete, ja ükski leht ei saa toitu teie jaoks ohutuks tunnistada — ainult sildi pakendil teie käes ja arst, kes teie ajalugu tunneb. Kõik, mis ületab kergeid, lühiajalisi sümptomeid suus või ninas — turse, mis mõjutab hingamist või neelamist, nõgestõbi suust eemal, vilistav hingamine, oksendamine või minestustunne — on hädaolukorra küsimus, mitte lugemise küsimus.

● tipunädalad · ○ tavaliselt õhus. Tüüpiline mandri aken piirkonna riiklikest aerobioloogia seireprogrammidest · kontrollitud2026-09-06

Kus see siin kasvab

Birch is the defining tree of this region and the single most important outdoor allergen in it. Silver birch and downy birch together cover a large share of the forest area of Estonia, Latvia, Lithuania, Finland and Sweden, they colonise every clearing and roadside, and they are planted in gardens and along streets in every town. There is no realistic way to avoid the source.

Millal see on õhus

The birch season is short, violent and highly variable between years. In the Baltic states the heaviest days usually fall between the last week of April and mid-May; southern Finland runs a week or so later; Lapland can be four weeks later still. The tree also masts, so a heavy flowering year is often followed by a lighter one, and a single warm, dry, windy week can compress most of the season into a few days.

Kuidas see tundub

Eyes are usually the worst of it: swollen, streaming, gritty, worse in wind. Add a blocked nose, sneezing, an itchy palate and, for many people, genuine exhaustion — the constant low-grade inflammation and broken sleep of a bad May is not imagined. Asthma symptoms commonly step up during the peak fortnight.

Millega see ristreageerib

Bet v 1 is the reason birch matters far beyond hay fever. It is a PR-10 protein, and near-identical proteins occur in apple (Mal d 1), stone fruit, hazelnut (Cor a 1), carrot (Dau c 1), celery (Api g 1), soy (Gly m 4) and peanut (Ara h 8). An immune system trained on birch pollen recognises them, and biting into a raw apple in May produces an itchy mouth. This is pollen-food allergy syndrome, and in birch country it is the most common food allergy in adults.

Seotud õietolmud:alder, hazel, oak, hornbeam and beech.

Toidud, millest on teatatud ristreageerimist:

ApplePearCherryPlumPeachApricotHazelnutAlmondCarrotCeleryParsnipSoy drink and tofuPeanutKiwi

Ristreageerimine ei ole sama mis toiduallergia, mis algas toidust, ja erinevus otsustab, kui tõsine see on. Lugege kuidas oraalse allergia sündroom töötab enne järelduste tegemist sellest nimekirjast, ja pange tähele, et mitmed neist toitudest ilmuvad ka neljateistkümnel deklareeritaval ELi allergeenil täiesti eraldi põhjustel.

Nimetatud allergeenmolekulid:Bet v 1 (PR-10, the major allergen), Bet v 2 (profilin), Bet v 6. Need on ametlikud WHO/IUIS nimed, ja neid raporteerib komponent-lahendatud vereanalüüs.

Mis tegelikult aitab

Birch pollen is one of the five types the CAMS European model forecasts, so a daily number exists. Preventive treatment works better than rescue treatment: nasal steroid sprays need days to reach full effect, so they are started before the season, not during it. Birch is also the classic candidate for allergen immunotherapy, which is a clinician-led, multi-year decision — not something to start from a web page.

Mis loetakse valesti

Two things get confused every year. First, a raw apple causing an itchy mouth in May is birch, not "an apple allergy" — the same apple baked in a pie is usually fine, because Bet v 1 homologues fall apart with heat. Second, the peak is not the whole season: the tail in late May still carries enough pollen to keep symptoms going after the visible catkins have gone.

Allikad:Määrus (EL) nr 1169/2011, II lisa· Komisjoni rakendusmäärus (EL) nr 828/2014 (gluteeniväited)· WHO/IUIS allergeenide nomenklatuur· hooajaaknad Eesti, Soome, Rootsi, Taani ja Norra riiklikest aerobioloogia seireprogrammidest· ristreageerimise mustrid parafraseeritud allergiakirjandusest ja EAACI materjalist· kontrollitud2026-09-06

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