Condition category
Nervous System Diseases
Date applied
Date assigned
Last edited
Retrospectively registered
Overall trial status
Recruitment status
No longer recruiting
Publication status
Results overdue

Plain English Summary

Background and study aims
Meningitis is an infection that causes inflammation of the meninges (the protective lining that cover the brain and spinal cord). Meningitis can be bacterial or viral, but bacterial meningitis is far more serious. If bacterial meningitis is not treated in time, then it can cause severe brain damage and infect the blood (septicaemia) leading to death. In Africa, more than 90% of meningitis epidemics are caused by a bacterial variety commonly referred to as group A meningitis, which mainly affects children. Due to the widespread devastation this disease has caused, a vaccine has been produced for use against meningitis A in sub-Saharan Africa, known as MenAfriVac. An important part in the development of new vaccines is to measure how effective they are, and how long the immunity gained from them lasts for. This information provides useful information about vaccination programmes and schedules (i.e. if “booster” injections are needed). In a previous study, the safest dose of the MenAfriVac vaccine and whether it is more effective when given alone or with the recommended vaccines for children (EPI vaccines) was investigated. The aim of this follow up study is to look at the group A meningitis immunity in the long-term, for children involved in the initial study.

Who can participate?
Healthy children who took part in the PsA-TT-004 study, received the PsA-TT study vaccine and who completed the final study visit in 2011 (children now aged 6 to 8 years)
Healthy children who received a single dose of MenAfriVac® during the national campaign in 2012 at age 12-18 months (children now aged 4 to 6 years)

What does the study involve?
All participants have two blood samples taken 12 months apart. Immunity against group A meningitis is then measured.

What are the possible benefits and risks of participating?
There is no direct benefit of participating in the study, however if any of the children involved have any sudden illnesses, then this will be treated straight away. There are no notable risks of participating other than possible discomfort during blood collection.

Where is the study run from?
Navrongo Health Research Centre (Ghana)

When is the study starting and how long is it expected to run for?
September 2015 to December 2017

Who is funding the study?
Bill and Melinda Gates Foundation (USA)

Who is the main contact?
Dr Cheryl Keech

Trial website

Contact information



Primary contact

Dr Cheryl Keech


Contact details

2201 Westlake Avenue
Suite 200
United States of America

Additional identifiers

EudraCT number number

Protocol/serial number


Study information

Scientific title

Evaluation of the Men A specific antibody persistence in Ghanaian children more than five years after immunization with PsA-TT (2.5 µg, 5 µg, or 10 µg polysaccharide concentration) Long-term follow-up of infants of 14-18 weeks age who participated in clinical trial PsA-TT-004 in Ghana


Study hypothesis

Age specific and dose specific Men A antibodies persist more than five years in children who were immunized as infants and toddlers with the PsA-TT (2.5, 5, or 10 µg polysaccharide concentration) following a two dose or single dose schedule.

This study is a follow-up study to the PsA-TT-004 study, please see:

Ethics approval

1. Navrongo Health Research Centre Institutional Review Board, 31/08/2015, ref: NHRCIRB20S
2. Ghana Health Service Ethics Review Committee, 01/09/2015, ref: GHS-ERC 02/07/15

Study design

Longitudinal observational single-center study

Primary study design


Secondary study design

Trial setting


Trial type


Patient information sheet


Meningococcal A disease


Former PsA-TT-004 participants previously received either a two dose regimen of PsA-TT (2.5, 5, or 10 µg dosage) at 14 to 18 weeks and 9 to 12 months of age or a single dose of 10 µg PsA-TT at 9 to 12 months or at 12 to 18 months of age.
In addition, a matched age control group will be recruited among children who participated in the MenAfriVac® National Campaign in 2012 and were aged 12-18 months, inclusive when a single dose of MenAfriVac® was received during the campaign. This study comprises two time points 12 months apart to obtain blood serum for analysis and complete a case report form.

Intervention type



Drug names

Primary outcome measure

Meningococcal A antibody persistence will be assessed one year after recruitment and then again a year later, in terms of geometric mean titer (GMT) of meningococcal A antibody titers as measured by rSBA assay for each study group (groups 1A, 1B, 1C, 2, and 3 from the original PsA-TT-004 study and a new control group).

Secondary outcome measures

The percentage of subjects who have a 4-fold or higher response in MenA antibody titer with respect to pre-immunization MenA antibody titer (from initial study), as measure by rSBA assay will be determined one year after recruitment and then again a year later.

Overall trial start date


Overall trial end date


Reason abandoned (if study stopped)


Participant inclusion criteria

1. Enrolled in the initial study intervention group and completed the final blood draw at 36 weeks
2. Received at age 12-18 months (inclusive) a single dose of MenAfriVac® during the national campaign in 2012 (new control group)

Participant type

Healthy volunteer

Age group




Target number of participants


Participant exclusion criteria

1. Any chronic condition or medical/hereditary history suggesting subject would be immuno-compromised (i.e. HIV, autoimmune disease)
2. Non-residence in the study area or intent to move out within one year (new control group only)
3. Any condition or criteria that in the opinion of the investigator might compromise the well-being of the subject or the compliance with study procedures or interfere with the outcome of the study

Recruitment start date


Recruitment end date



Countries of recruitment


Trial participating centre

Navrongo Health Research Centre
Ghana Health Service

Sponsor information


Program for Appropriate Technology in Health

Sponsor details

2201 Westlake Avenue
Suite 200
United States of America
+1 206.285.3500

Sponsor type




Funder type


Funder name

Bill and Melinda Gates Foundation

Alternative name(s)

बिल एंड मिलिंडा गेट्स फाउंडेशन, Bill & Melinda Gates Foundation, Gates Foundation, 比尔及梅琳达·盖茨基金会, BMGF, B&MGF

Funding Body Type

private sector organisation

Funding Body Subtype

Trusts, charities, foundations (both public and private)


United States of America

Results and Publications

Publication and dissemination plan

Not provided at time of registration.

Intention to publish date

Participant level data

Not provided at time of registration

Basic results (scientific)

Publication list

Publication citations

Additional files

Editorial Notes

20/102/2016: The recruitment dates have been updated from 16/09/2015 - 15/12/2015 to 18/09/2015 - 04/12/2015.