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Clinical Trial Details — Status: Completed

Administrative data

NCT number NCT01559597
Other study ID # Epicentre/CTC-TT/2012
Secondary ID
Status Completed
Phase N/A
First received March 19, 2012
Last updated May 1, 2013
Start date November 2012
Est. completion date March 2013

Study information

Verified date February 2013
Source Epicentre
Contact n/a
Is FDA regulated No
Health authority France: Committee for the Protection of Personnes
Study type Interventional

Clinical Trial Summary

The purpose of this study is to determine the effectiveness, safety and feasibility of a tetanus toxoid (TT) vaccination strategy relying on the maintenance of vaccines in a controlled temperature chain (CTC). The CTC is defined as the storage and transport of vaccines within a temperature range appropriate to the heat stability profile of TT vaccine. In this study vaccines are transported and stored in the cold chain up to district level. From district to beneficiary level vaccines are exposed to ambient temperatures during a limited period of time.

In an initial phase, the stability of 3 lots of TT vaccine kept in CTC is determined. For this, the potency, safety, pH and adsorption of vaccines maintained in CTC will be tested in the laboratory and compared to vaccines that have been maintained in cold chain. If all parameters (i.e. potency, safety, pH and adsorption) are above WHO specifications the strategy in CTC will be used.

Only if the laboratory results are adequate, villages will be assigned to one of the vaccination strategies. All women between 14 to 49 years of age in the selected villages who fulfill the inclusion criteria will be invited to participate.

In order to determine the baseline anti-tetanus protection, TT vaccination history will be collected from all participants using a standardized questionnaire. Women who have already received at least 2 doses of TT vaccine will be excluded from the study. Moreover, blood will be collected from all participants to later verify in laboratory the baseline protection.

A first dose of TT vaccine will be given according to the assigned strategy (CTC or cold chain). Four weeks after the 1st vaccination, a second TT vaccine will be given using the same strategy employed for the first dose. Finally, four weeks after the second dose, a blood sample will be collected from all participants who received two doses of vaccine. The serological responses will be compared in the group that received two doses of TT vaccine maintained in cold chain ant the group that received two doses of vaccine maintained in CTC.


Recruitment information / eligibility

Status Completed
Enrollment 2129
Est. completion date March 2013
Est. primary completion date March 2013
Accepts healthy volunteers Accepts Healthy Volunteers
Gender Female
Age group 14 Years to 49 Years
Eligibility Inclusion Criteria:

- Women aged between 14 to 49 years of age

- Living in the district of Moïssala, Chad

- Have no proof of previous vaccination or previous vaccination is not greater than 1 dose of vaccine

- Previous dose received more than 1 month before

- Consented to be included in the study

Exclusion Criteria:

- Allergic reaction to previous tetanus vaccination

- Severe febrile illness

- Have received a tetanus vaccine within the previous month

- Refuses vaccination or does not consent

- Nomadic population travelling before the end of the study

- Pregnant women due to deliver within 2 weeks

Study Design

Allocation: Randomized, Endpoint Classification: Bio-equivalence Study, Intervention Model: Parallel Assignment, Masking: Single Blind (Subject), Primary Purpose: Prevention


Related Conditions & MeSH terms


Intervention

Biological:
Tetanus toxoid vaccine
Two doses of tetanus toxoid vaccine separated at least 4 weeks. One arm receives the vaccine kept in cold chain and the other arm receives the vaccine kept in CTC

Locations

Country Name City State
Chad Moïssala health district Moïssala

Sponsors (1)

Lead Sponsor Collaborator
Epicentre

Country where clinical trial is conducted

Chad, 

Outcome

Type Measure Description Time frame Safety issue
Primary Protective level of anti-tetanus antibodies The proportion of women who achieve a protective level of anti-tetanus antibodies after 2 doses of vaccine kept in CTC is not lower to the proportion of women who achieve a protective level of anti-tetanus antibodies after 2 doses of vaccine kept in cold chain. 4 weeks after second dose of vaccine No
Secondary Vaccine stability Verify the stability of the vaccine (potency, safety, pH and adsorption) after exposure to ambient temperatures 30 days after exposure to ambient temperatures No
Secondary Antibody levels Evaluate the percentage increase in antibody levels in women who have received 2 doses of vaccine maintained in CTC and in women who have received 2 doses of vaccine maintained in cold chain 4 weeks after second dose of vaccine No
Secondary Adverse events Compare the adverse events in the group vaccinated with the vaccine kept in CTC and the group vaccinated with the vaccine kept in cold chain. 30 min and 7 days after vaccination Yes
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