Background: The conjugate vaccine against serogroup A Neisseria meningitidis (NmA), MenAfriVac, was first introduced in mass vaccination campaigns of the 1-29-year-olds in Burkina Faso in 2010. The aim of this study was to genetically characterize meningococcal isolates circulating in Burkina Faso before and up to 13 months after MenAfriVac mass vaccination.
Methods: A total of 1,659 meningococcal carriage isolates were collected in a repeated cross-sectional carriage study of the 1-29-year-olds in three districts of Burkina Faso in 2010 and 2011, before and up to 13 months after mass vaccination. Forty-two invasive isolates were collected through the national surveillance in Burkina Faso in the same period. All the invasive isolates and 817 carriage isolates were characterized by serogroup, multilocus sequence typing and porA-fetA sequencing.
Results: Seven serogroup A isolates were identified, six in 2010, before vaccination (4 from carriers and 2 from patients), and one in 2011 from an unvaccinated patient; all were assigned to sequence type (ST)-2859 of the ST-5 clonal complex. No NmA carriage isolate and no ST-2859 isolate with another capsule were identified after vaccination. Serogroup X carriage and disease prevalence increased before vaccine introduction, due to the expansion of ST-181, which comprised 48.5% of all the characterized carriage isolates. The hypervirulent serogroup W ST-11 clone that was responsible for most of meningococcal disease in 2011 and 2012 was not observed in 2010; it appeared during the epidemic season of 2011, when it represented 40.6% of the serogroup W carriage isolates.
Conclusions: Successive clonal waves of ST-181 and ST-11 may explain the changing epidemiology in Burkina Faso after the virtual disappearance of NmA disease and carriage. No ST-2859 strain of any serogroup was found after vaccination, suggesting that capsule switching of ST-2859 did not occur, at least not during the first 13 months after vaccination.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3750508 | PMC |
| http://dx.doi.org/10.1186/1471-2334-13-363 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Spatial analysis and risk mapping of Crimean-Congo hemorrhagic fever (CCHF) in Sub-saharan Africa.
Sci Rep
January 2025
International Livestock Research Institute (ILRI), Human and Animal Health, Berlin, Germany.
Crimean Congo hemorrhagic fever (CCHF) is a re-emerging tick-borne zoonosis that is caused by CCHF virus (CCHFV). The geographical distribution of the disease and factors that influence its occurrence are poorly known. We analysed historical records on its outbreaks in various countries across the sub-Saharan Africa (SSA) to identify hotspots and determine socioecological and demographicfactors associated with these outbreaks.
View Article and Find Full Text PDFFood insecurity and achieving adequate nutrition is a major global challenge, especially in vulnerable groups such as refugee communities. In West Africa, thousands of Burkina Faso refugees have crossed the border into northern Ghana due to conflict and instability in their home country. We conducted a one-off cross-sectional survey to assess household food insecurity, living conditions, and sense of security among Burkina Faso refugees currently residing in the Upper East region of Ghana.
View Article and Find Full Text PDFTransmission of transgenic mosquito-killing fungi during copulation.
Sci Rep
January 2025
Institut de Recherche en Sciences de la Santé, IRSS, Bobo-Dioulasso, Burkina Faso.
Entomopathogenic fungi engineered to express insect-specific neurotoxins have demonstrated potential as microbial control agents against malaria mosquitoes. Currently, the primary application method is via direct contact of spores with indoor resting mosquitoes. However, many malaria-transmitting mosquitoes feed and rest outdoors.
View Article and Find Full Text PDFTo concentrate omega-3 fatty acids (-3) in fish oil (FO), olein and super olein fraction (OF) of FO were produced by winterization. For this purpose, FO was slowly cooled to -50°C (24 h), the mixture of crystallized and non-crystallized phases was separated, filtrate was coded as OF (yield 32%), 35% of OF was kept for storage study and analytical purpose, remaining 65% was further slowly cooled down to -75°C (24 h) and filtered, filtrate was coded as super olein (SF, yield 23%). GC-MS analysis showed that unsaturated fatty acids increased due to successive winterization.
View Article and Find Full Text PDFDevelopment of sustainable global pediatric surgery: Pioneering solutions from Burkina Faso.
World J Surg
January 2025
Ministry of Health and Public Hygiene, Ouagadougou, Burkina Faso.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!