Characterisation of Occupational Allergy to Drosophila

Not Applicable

Completed

• Conditions: Drosophila; Clinical Symptoms
• Interventions: Other: blood test (four dry tubes 7ml) and prick tests

• Registration Number: NCT02535793
• Lead Sponsor: University Hospital, Montpellier

Brief Summary

Allergy is a very common problem and can be a handicap in everyday life, specially when symptoms occur at work place. Some persons working with drosophila developed respiratory symptoms. Investigators tried to analyze if these manifestations could be due to a specific allergy to drosophila.

Detailed Description

To do so, investigators invited laboratory workers who presented any symptoms in presence of drosophila to undergo skin prick tests in order to determine if a specific sensibilization to drosophila exists. Then, a blood sample is taken from these persons to research specific IgE directed against drosophila. By this way, investigators hope determine if a specific allergy to drosophila exists, its characteristics as prevalence, symptoms, populations concerned...in order to better protect laboratory workers and prevent allergy incidence.

Study Timeline

• Study Start: 2014-09
• Primary Completion: 2015-02
• Study Completion: 2015-02
• Study First Submitted: 2015-08-20
• Study First Submitted QC: 2015-08-26
• Study First Posted: 2015-08-31
• Status Verified: 2016-04
• Last Update Submitted: 2016-04-11
• Last Update Posted: 2016-04-12

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 12

Inclusion Criteria

• major males or females (aged <68) who work in laboratory with drosophila in Montpellier (France)
• clinical symptoms in presence of drosophila
• The subject must be affiliated to a social security scheme
• Provision of informed consent prior to any study specific procedures

Exclusion Criteria

• The patient has indicated against (or incompatible drug combination) concerning the implementation of a prick test
• antihistamine cure in progress
• Inability to understand the nature and goals of the study and / or communication difficulties with the investigator
• No affiliation to a French social security recipient or not such a scheme
• Major protected by law (guardianship, curator or under judicial protection)
• deprivation of liberty by judicial or administrative decision
• Increased likelihood of non compliance to the protocol or abandonment under study
• pregnancy or breastfeeding

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
laboratory workers with symptoms in presence of drosophila	blood test (four dry tubes 7ml) and prick tests	-

Primary Outcome Measures

Name	Time	Method
Number of participants with positive prick test to drosophila	The day of inclusion	Prick tests : measuring the size of the skin reaction (wheal) after prick tests with drosophila. A wheal measuring more than 4 millimeters in diameter sign a sensitization to drosophila. Then, a blood sample is collected in order to measure specific drosophila IgE rate

Secondary Outcome Measures

Name	Time	Method
Survey to analyse risk factors for allergy to drosophila	The day of inclusion	analysis of professional (attended institute, time from start working with drosophila, type of animal manipulation (species, living, dead, DNA, protein) use of protection,) or personal factors (age, gender, others allergies, treatment used) which could lead to allergic reaction to drosophila

Trial Locations

Locations (1)

Hôpital Arnaud de Villeneuve; 🇫🇷 Montpellier, France