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Cyanobacteria Allergy in Lake Kineret

NCT ID: NCT01693198

Last Updated: 2012-09-26

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

UNKNOWN

Clinical Phase

NA

Total Enrollment

200 participants

Study Classification

INTERVENTIONAL

Study Start Date

2012-11-30

Study Completion Date

2014-11-30

Brief Summary

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People swimming or surfing in lake Kineret , sometimes complain of nasal stuffiness , sneezing and itching .Typically, it happens during or immediately after contact with the lake's water . The symptoms are compatible with immediate allergic reaction. Previous reports suggested a connection between similar symptoms and contact with different cyanobacteria (living in fresh water lakes). In this study we intend to prove the mechanism of these reactions. To prove the exact allergen that causes allergic rhinitis allergists perform skin tests with different suspected allergens. Likewise, we would like to perform skin tests to different proteins extracted from cyanobacteria collected in lake Kineret.

Detailed Description

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Conditions

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Nasal Stuffiness Sneezing Itching

Keywords

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allergy cyanobacteria sweet water swimming

Study Design

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Allocation Method

NA

Intervention Model

SINGLE_GROUP

Primary Study Purpose

DIAGNOSTIC

Blinding Strategy

NONE

Interventions

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Skin test with sterile extracts of different cyanobacteria

Skin test with sterile extracts of different cyanobacteria is performed on the volar aspect of the forearm. Typically, the results are read 15 minutes after performing the test. Test is regarded as positive when wheal of more than 3mm and flare appear within this time frame. Positive test indicates the existence of specific IgE to the extract in on skin mast cells .

Intervention Type PROCEDURE

Eligibility Criteria

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Inclusion Criteria

* age above 18
* exposed to Lake Keneret water by swiming or sirfing

Exclusion Criteria

* age under 18
* pregnancy
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Yigal Allon Kinneret Limnological Laboratory

UNKNOWN

Sponsor Role collaborator

Meir Medical Center

OTHER

Sponsor Role lead

Responsible Party

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Ronit Confino-Cohen

MD

Responsibility Role PRINCIPAL_INVESTIGATOR

Locations

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Meir medical center

Kfar Saba, , Israel

Site Status

Countries

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Israel

Central Contacts

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Ronit Confino-Cohen, MD

Role: CONTACT

Phone: 97297472811

Email: [email protected]

Arnon Goldberg, MD

Role: CONTACT

Phone: 97297472717

Email: [email protected]

Facility Contacts

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Ronit Confino-Cohen, MD

Role: primary

Arnon Goldberg, MD

Role: backup

References

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1. Carmichael W. A world overview-One-hundred-twentyseven years of research on toxic cyanobacteria-Where do we go from here? Adv Exp Med Biol 2008;619:105-125 2. Petrus M, Culerrier R, Campistron M, Barre A, Rouge P. First case report of anaphylaxis to spirulin: identification of phycocyanin as responsible allergen. AL L ERGY (AllergyNet) 2010; 65 : 924-932N 3. Torokne A, Palovics A, and Bankine M. Allergenic (sensitization, skin and eye Irritation).Effects of freshwater Cyanobacteria-experimental evidence. Environ Toxicol 2001; 16: 512-516 4.Alster, A., Kaplan-Levy, R., Sukenik, A. & Zohary, T. Morphology and phylogeny of a non-toxic invasive Cylindrospermopsis raciborskii from a Mediterranean Lake. Hydrobiologia 2010; 639, 115-128. 5.Banker, R., Carmeli, S., Hadas, O., Teltsch, B., Porat, R. & Sukenik, A. Identification of cylindrospermopsin in Aphanizomenon ovalisporum (Cyanophyceae) isolated from Lake Kinneret, Israel. Journal of Phycology 1997; 33, 613-616. 6.Hadas, O., Pinkas, R., Malinsky-Rushansky, N., Nishri, A., Kaplan, A., Rimmer, A. & Sukenik, A. Appearance and establishment of diazotrophic cyanobacteria in Lake Kinneret, Israel. Freshwater Biology 2012; 57, 1214-1227. 7. Bernstein JA, Ghosh D, Levin LS, Zheng S, Carmichael W, Lummus Z, Bernstein IL. Cyanobacteria: an unrecognized ubiquitous sensitizing allergen? Allergy Asthma Proc. 2011;32:106-110 8.Törökné, A., Asztalos, M., Bánkiné, M., Bickel, H., Borbély, G., Carmeli, S., Codd, G.A., Fastner, J., Huang, Q., Humpage, A., Metcalf, J.S., Rábai, E., Sukenik, A., Surányi, G., Vasas, G. & Weiszfeiler, V. Interlaboratory comparison trial on cylindrospermopsin measurement. Analytical Biochemistry 2004; 332, 280-284. 9.Lawton, L.A., Edwards, C. & Codd, G.A. Extraction and high-performance liquid chromatographic method for the determination of microcystins in raw and treated waters. Analyst 1994; 119, 1525-1530

Reference Type BACKGROUND

Other Identifiers

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0172-12-MMC

Identifier Type: -

Identifier Source: org_study_id