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Cyanobacteria Allergy in Lake Kineret

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT01693198
Recruitment Status : Unknown
Verified September 2012 by Ronit Confino-Cohen, Meir Medical Center.
Recruitment status was:  Not yet recruiting
First Posted : September 26, 2012
Last Update Posted : September 26, 2012
Yigal Allon Kinneret Limnological Laboratory
Information provided by (Responsible Party):
Ronit Confino-Cohen, Meir Medical Center

Tracking Information
First Submitted Date  ICMJE September 19, 2012
First Posted Date  ICMJE September 26, 2012
Last Update Posted Date September 26, 2012
Study Start Date  ICMJE November 2012
Estimated Primary Completion Date November 2014   (Final data collection date for primary outcome measure)
Current Primary Outcome Measures  ICMJE
 (submitted: September 23, 2012)
Reproducibility of skin test to cyanobacteria [ Time Frame: Immediately after performing the test (15 minutes) ]
Original Primary Outcome Measures  ICMJE Same as current
Change History No Changes Posted
Current Secondary Outcome Measures  ICMJE Not Provided
Original Secondary Outcome Measures  ICMJE Not Provided
Current Other Pre-specified Outcome Measures Not Provided
Original Other Pre-specified Outcome Measures Not Provided
Descriptive Information
Brief Title  ICMJE Cyanobacteria Allergy in Lake Kineret
Official Title  ICMJE Cyanobacteria Allergy in Lake Kineret
Brief Summary 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 Not Provided
Study Type  ICMJE Interventional
Study Phase  ICMJE Not Applicable
Study Design  ICMJE Allocation: N/A
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Diagnostic
Condition  ICMJE
  • Nasal Stuffiness
  • Sneezing
  • Itching
Intervention  ICMJE Procedure: 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 .
Study Arms  ICMJE Not Provided
Publications * 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

*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
Recruitment Information
Recruitment Status  ICMJE Unknown status
Estimated Enrollment  ICMJE
 (submitted: September 23, 2012)
Original Estimated Enrollment  ICMJE Same as current
Estimated Study Completion Date  ICMJE November 2014
Estimated Primary Completion Date November 2014   (Final data collection date for primary outcome measure)
Eligibility Criteria  ICMJE

Inclusion Criteria:

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

Exclusion Criteria:

  • age under 18
  • pregnancy
Sex/Gender  ICMJE
Sexes Eligible for Study: All
Ages  ICMJE 18 Years and older   (Adult, Older Adult)
Accepts Healthy Volunteers  ICMJE No
Contacts  ICMJE Contact information is only displayed when the study is recruiting subjects
Listed Location Countries  ICMJE Israel
Removed Location Countries  
Administrative Information
NCT Number  ICMJE NCT01693198
Other Study ID Numbers  ICMJE 0172-12-MMC
Has Data Monitoring Committee Yes
U.S. FDA-regulated Product Not Provided
IPD Sharing Statement  ICMJE Not Provided
Responsible Party Ronit Confino-Cohen, Meir Medical Center
Study Sponsor  ICMJE Meir Medical Center
Collaborators  ICMJE Yigal Allon Kinneret Limnological Laboratory
Investigators  ICMJE Not Provided
PRS Account Meir Medical Center
Verification Date September 2012

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP