- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT00131833
Typhoid Vi Vaccine Effectiveness in Hechi, Guangxi, China
Typhoid Vi Vaccine Effectiveness in a Population Older Than 5 Years of Age Living in an Endemic Area in Hechi, Guangxi, P.R. China: A Group-Randomized Controlled Demonstration Project
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Typhoid fever is a major cause of morbidity worldwide. The disease predominantly affects school-aged children, is more prevalent in urban areas, may last for several weeks and can lead to serious complications. Management of this disease is further complicated by the emergence of multi-drug resistant strains. Vaccination of high risk populations is considered the most promising strategy for the control of typhoid fever. The Vi polysaccharide vaccine has been targeted for accelerated introduction into public health programs due to the following reasons: it has been shown to have consistent efficacy results even in areas of high typhoid incidence, is given as a single dose, lacks patent protection and requires less strict cold chain requirements.
This project attempts to evaluate a new vaccination strategy for residents of endemic areas. A cluster-randomized trial involving the Vi polysaccharide vaccine and an active control (meningococcal A vaccine) was designed to determine the effectiveness and the feasibility of providing Vi vaccine under actual programmatic conditions in 2 populous townships of Hechi City. The vaccines used in this study are locally produced and licensed in China. A 1 year pilot phase will precede the actual Vi-demonstration project. Surveillance for typhoid fever cases will continue after the mass immunization campaign. A passive surveillance system to evaluate adverse events following immunization will be implemented. Socio-economic studies will be conducted in parallel to the effectiveness evaluation. The knowledge, attitudes, beliefs and practices among parents and health care providers regarding typhoid illness, treatment and prevention will be assessed. Logistic, feasibility and vaccine costs will also be determined.
Secondary objectives of this trial are:
- To estimate the logistic feasibility of a mass typhoid immunization campaign
- To assess the knowledge, attitudes, beliefs and practices among parents and health care providers regarding typhoid illness, treatment and prevention
- To study typhoid fever risk factors in the population
Study Type
Enrollment
Phase
- Phase 4
Contacts and Locations
Study Locations
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Guangxi
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Hechi City, Guangxi, China, 54700
- Hechi City Center for Disease Control
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Registered in the project census
Exclusion Criteria:
- Pregnant
- Lactating
- Fever > 37.5 degrees Celsius, axillary
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Prevention
- Allocation: Randomized
- Interventional Model: Single Group Assignment
- Masking: Double
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
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adverse events
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vaccine effectiveness
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cost effectiveness of typhoid Vi immunization
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Secondary Outcome Measures
Outcome Measure |
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Typhoid risk factors
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logistic feasibility of mass typhoid immunization
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anti-Vi antibody response
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knowledge, attitudes, beliefs and practices of parents and health care providers on typhoid fever prevention and treatment
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Collaborators and Investigators
Sponsor
Collaborators
Investigators
- Principal Investigator: Dong Baiqing, MD, Guangxi Center for Disease Control and Prevention
Publications and helpful links
General Publications
- Acosta CJ, Galindo CM, Ochiai RL, Danovaro-Holliday MC, Page AL, Thiem VD, Park JK, Park E, Koo H, Wang XY, Abu-Elyazeed R, Ali M, Albert MJ, Ivanoff B, Pang T, Xu ZY, Clemens JD. The role of epidemiology in the introduction of vi polysaccharide typhoid fever vaccines in Asia. J Health Popul Nutr. 2004 Sep;22(3):240-5.
- Dong BQ, Yang J, Tang ZZ, Yang HH, Zeng J, Zhang J, Wang ML, Liang GC, Si GA, Li CY, Liang DB, Liao HZ, Ochiai RL, Mohammad A, Acosta CJ, Clemens J. [Application of cluster randomization method on typhoid Vi vaccine trails]. Zhonghua Liu Xing Bing Xue Za Zhi. 2005 Feb;26(2):97-100. Chinese.
- Yang J, Acosta CJ, Si GA, Zeng J, Li CY, Liang DB, Ochiai RL, Page AL, Danovaro-Holliday MC, Zhang J, Zhou BD, Liao HZ, Wang ML, Tan DM, Tang ZZ, Gong J, Park JK, Ali M, Ivanoff B, Liang GC, Yang HH, Pang T, Xu ZY, Donner A, Galindo CM, Dong BQ, Clemens JD. A mass vaccination campaign targeting adults and children to prevent typhoid fever in Hechi; expanding the use of Vi polysaccharide vaccine in southeast China: a cluster-randomized trial. BMC Public Health. 2005 May 18;5:49. doi: 10.1186/1471-2458-5-49.
Study record dates
Study Major Dates
Study Start
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Estimate)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- T3
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