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Prevalence of ragweed allergy in rural Geneva - a pilot study.

Abstract The prevalence of ragweed allergy is increasing worldwide. Ragweed distribution and abundance is spreading in Europe in a wide area ranging from the Rhone valley in France to Hungary and Ukraine, where the rate of the prevalence can peak at as high as 12%. Low-grade ragweed colonisation was seen in Geneva and Ticino, less than two decades ago. There were fears that allergies to ragweed would increase Switzerland. The intent of this study was to assess the rate of prevalence of sensitisation and allergy to ragweed in the population living in the first rural Swiss setting where ragweed had been identified in 1996, and to evaluate indirectly the efficacy of elimination and containment strategies.
PMID
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Authors

Mayor MeshTerms
Keywords
Journal Title swiss medical weekly
Publication Year Start




PMID- 26496716
OWN - NLM
STAT- MEDLINE
DA  - 20151027
DCOM- 20160622
IS  - 1424-3997 (Electronic)
IS  - 0036-7672 (Linking)
VI  - 145
DP  - 2015
TI  - Prevalence of ragweed allergy in rural Geneva - a pilot study.
PG  - w14198
LID - 10.4414/smw.2015.14198 [doi]
LID - Swiss Med Wkly. 2015;145:w14198 [pii]
AB  - OBJECTIVE: The prevalence of ragweed allergy is increasing worldwide. Ragweed
      distribution and abundance is spreading in Europe in a wide area ranging from the
      Rhone valley in France to Hungary and Ukraine, where the rate of the prevalence
      can peak at as high as 12%. Low-grade ragweed colonisation was seen in Geneva and
      Ticino, less than two decades ago. There were fears that allergies to ragweed
      would increase Switzerland. The intent of this study was to assess the rate of
      prevalence of sensitisation and allergy to ragweed in the population living in
      the first rural Swiss setting where ragweed had been identified in 1996, and to
      evaluate indirectly the efficacy of elimination and containment strategies.
      MATERIAL AND METHODS: In 2009, 35 adults in a rural village in the Canton of
      Geneva were recruited. Data were collected by means of questionnaires and
      skin-prick tests were done on each participant. The study was approved by the
      local Ethics Committee. RESULTS: Based on questionnaires, 48.6% had rhinitis (95%
      confidence interval [CI] 32.9-64.4; n = 17/35) and 17.1% asthma (95% CI 8.1-32.6;
      n = 6/35). Atopy was diagnosed in 26.4% (95% CI 12.9-44.4) of the sample (n =
      9/34). Ragweed sensitisation was found in 2.9% (95% CI 0.7-19.7; n = 1/34),
      mugwort sensitisation in 2.9% (95% CI 0.1-14.9; n = 1/35), alder sensitisation in
      17.1% (95% CI 6.6-33.6; n = 6/35), ash sensitisation in 12.5% (95% CI 3.5-29.0; n
      = 4/32) and grass sensitisation in 22.9% (95% CI 10.4-40.1; n = 8/35). Ragweed
      (95% CI 0.1-14.9; n = 1/34) and mugwort allergies (95% CI 0.1-14.9; n = 1/35)
      were both found in 2.9% of the population. CONCLUSION: This study showed a
      surprisingly low incidence of ragweed sensitisation and allergy, of 2.9% and
      2.9%, respectively, 20 years after the first ragweed detection in Geneva. The
      feared rise in ragweed allergy seems not to have happened in Switzerland,
      compared with other ragweed colonised countries. These results strongly support
      early field strategies against ragweed.
FAU - Taramarcaz, Philip
AU  - Taramarcaz P
AD  - Centre des Allergies et de l'Asthme de la Terrassiere, Geneva, Switzerland.
FAU - Moetteli, Leila
AU  - Moetteli L
AD  - Jules Gonin eye Hospital, Lausanne, Switzerland.
FAU - Eigenmann, Philippe
AU  - Eigenmann P
AD  - University Hospitals of Geneva and Medical School of the University of Geneva,
      Switzerland.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20151023
PL  - Switzerland
TA  - Swiss Med Wkly
JT  - Swiss medical weekly
JID - 100970884
RN  - 0 (Allergens)
RN  - Ragweed Sensitivity
SB  - IM
MH  - Adult
MH  - Allergens/*immunology
MH  - Alnus/immunology
MH  - Ambrosia/*immunology
MH  - Artemisia/immunology
MH  - Asthma/epidemiology
MH  - Environmental Illness/*epidemiology
MH  - Female
MH  - Fraxinus/immunology
MH  - Humans
MH  - Hypersensitivity, Immediate/*epidemiology
MH  - Incidence
MH  - Male
MH  - Middle Aged
MH  - Pilot Projects
MH  - Poaceae/immunology
MH  - Prevalence
MH  - Rhinitis, Allergic/epidemiology
MH  - Rural Population
MH  - Skin Tests
MH  - Surveys and Questionnaires
MH  - Switzerland/epidemiology
EDAT- 2015/10/27 06:00
MHDA- 2016/06/23 06:00
CRDT- 2015/10/27 06:00
PHST- 2015/10/23 [epublish]
PHST- 2015 [ecollection]
AID - 10.4414/smw.2015.14198 [doi]
AID - smw-14198 [pii]
PST - epublish
SO  - Swiss Med Wkly. 2015 Oct 23;145:w14198. doi: 10.4414/smw.2015.14198. eCollection 
      2015.

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