Prevalence of prolonged otitis media with effusion among 2 to 3 years old Cameroonian children in the era of 13-valent pneumococcal conjugate vaccines.

Objectives: There is data scarcity on the overall effects of pneumococcal conjugate vaccines (PCVs) on otitis media (OM) in low- and middle-income countries. The impact of the 13-valent PCV (PCV13) program on OM was evaluated in Cameroon where infant vaccination was implemented in July 2011 using a 3-dose primary series at 6, 10 and 14 weeks of age.

Methods: Through community-based surveillance, we used a retrospective cohort study design to assess OM prevalence among PCV13-vaccinated children aged 24 to 36 months in 2015.

Prevalence of pneumococcal nasopharyngeal colonization and serotypes circulating in Cameroonian children after the 13-valent pneumococcal conjugate vaccine introduction.

Background: Streptococcus pneumoniae remains a major contributor to childhood infections and deaths globally. In Cameroon, the 13-valent pneumococcal conjugate vaccine (PCV13) was introduced in July 2011, using a 3-dose Expanded programme on immunization (EPI) schedule administered to infants at 6, 10 and 14 weeks of age. To evaluate PCV13 effects, we assessed pneumococcal nasopharyngeal colonization and serotype distribution among Cameroonian children after PCV13 introduction.

Hospital-based Surveillance Provides Insights Into the Etiology of Pediatric Bacterial Meningitis in Yaoundé, Cameroon, in the Post-Vaccine Era.

Background: Meningitis is endemic to regions of Cameroon outside the meningitis belt including the capital city, Yaoundé. Through surveillance, we studied the etiology and molecular epidemiology of pediatric bacterial meningitis in Yaoundé from 2010 to 2016.

Methods: Lumbar puncture was performed on 5958 suspected meningitis cases; 765 specimens were further tested by culture, latex agglutination, and/or polymerase chain reaction (PCR).

Assessing the causes of under-five mortality and proportion associated with pneumococcal diseases in Cameroon. A case-finding retrospective observational study: 2006-2012.

Background: Vital registration data outlining causes of deaths (CoD) are important for a sustainable health system, targeted interventions and other relevant policies. There is data paucity on vital registration systems in developing countries. We assessed the leading causes and proportions of under-five deaths, and particularly those related to pneumococcal infections in Yaoundé, Cameroon, using hospital registration data.

The prevalence of otitis media in 2-3 year old Cameroonian children estimated by tympanometry.

Background: Acute otitis media is a common illness in children under-five years of age and associated with major health care resources in high-income countries. However, there is paucity of data on its epidemiology and clinical presentation in low-income countries. We estimated the prevalence of otitis media and assessed risk factors among children in Cameroon.

Vaccination of infants aged 0 to 11 months at the Yaounde Gynaeco-obstetric and pediatric hospital in Cameroon: how complete and how timely?

Background: Vaccination is a major, but simple and cost effective public health intervention in the prevention of infectious diseases, especially in children. Nowadays, many children still miss scheduled vaccines in the Extended Program of Immunization (EPI) or are being vaccinated after the recommended ages.This study was aimed at assessing vaccination completeness and timeliness in children aged 0 to 11 months attending the vaccination clinic of the Yaounde Gynaeco-Obstetric and Pediatric Hospital.

Epidemiology of rubella infection in Cameroon: a 7-year experience of measles and rubella case-based surveillance, 2008-2014.

Objective: The aim of this study was to estimate the proportion of rubella disease in a measles case-based surveillance in Cameroon prior to rubella vaccine introduction into the national immunisation programme.

Design: This was a cross-sectional study for rubella infection in Cameroon for the period 2008 to 2014.

Setting: Patients suspected with measles from the 10 regions of Cameroon were recruited according to the WHO measles case definition and were tested for rubella IgM antibodies accompanied with the case report/investigation forms.

[Serum procalcitonin: a reliable tool for the diagnosis and follow-up of neonatal bacterial infections in Sub-Saharan Africa].

Background And Aim: Neonatal infection (NNI) is a public health problem in developing countries where pediatricians and specifically neonatologists encounter many diagnostic difficulties. Having a precise and easily measurable biological marker, with a high sensitivity and a high negative predictive value, that can rapidly detect NNI, remains a great challenge. The aim of this study was to determine the place of serum procalcitonin (PCT) in the diagnosis and follow-up of bacterial NNI in resource-limited contexts.

Predictors to parental knowledge about childhood immunisation/EPI vaccines in two health districts in Cameroon prior to the introduction of 13-valent Pneumococcal Conjugate Vaccines (PCV-13).

Introduction: Pneumonia is vaccine-preventable, but the increasing death toll resulting from the disease in Sub-Saharan Africa is alarming. Several factors account for vaccine failing to reach every child, besides incomplete vaccine coverage. Most of these include the perceptions of parents/guardians and healthcare providers.

Molecular surveillance of rotavirus strains circulating in Yaoundé, Cameroon, September 2007-December 2012.

Rotavirus is the most common cause of severe diarrheal disease in children under 5 years of age worldwide. The World Health Organization (WHO) estimated that 453,000 rotavirus-attributable deaths occur annually. Through the WHO, the Rotavirus Sentinel Surveillance Program was established in Cameroon in September 2007 with the Mother and Child Center (MCC) in Yaoundé playing the role of sentinel site and national laboratory for this program.

Case Based Measles Surveillance Performance in 2010, Littoral Region of Cameroon.

The Littoral region of Cameroon met most of its routine immunization and surveillance objectives in 2010 but has not reiterated such a performance since then. We describe the case-based measles surveillance performance of 2010 by person, place, time and determine measles surveillance system delays. Descriptive statistics were performed using Epi Info 3.

A locally initiated and executed measles outbreak response immunization campaign in the nylon health district, Douala Cameroon 2011.

The Cameroon health system is divided into central, intermediate and peripheral levels. Of the 43 health districts with a measles outbreak in Cameroon in 2011, only the Nylon Health District organized a documented outbreak response immunization. We present the methods and results of the response campaign solely shouldered by the district and intermediate level.

Molecular characterization of measles viruses that circulated in Cameroon between 2010 and 2011.

Background: Measles virus (MeV) is monotypic, but genetic variation in the hemagglutinin H and nucleoprotein N genes can be analyzed by molecular epidemiologic techniques and used to study virus transmission patterns. The World Health Organization currently recognizes 8 clades (A-H) within which are 24 genotypes of MeV and one provisional genotype, d11. Genotype B3 is clearly the endemic genotype in most of African continent where it is widely distributed.

Epidemiology and clinical characteristics of the Measles outbreak in the Nylon Health District, Douala Cameroon: a retrospective descriptive cross sectional study.

Introduction: Measles is a public health problem especially in South Asia and Africa. Nylon Health District has experienced two measles outbreaks over a period of three years. We hereby describe the epidemiology and clinical characteristics of the outbreak of February 2011.

Bacterial meningitis and pneumococcal serotype distribution in children in cameroon.

Acute bacterial meningitis causes a substantial number of deaths in Cameroon. Among 170 children with acute meningitis, 112 were positive for a bacterial pathogen when tested using polymerase chain reaction amplification, and Streptococcus pneumoniae accounted for 57.1% of cases.

The frequency and magnitude of growth failure in a group of HIV-infected children in Cameroon.

Background: Growth impairment is a major manifestation of HIV infection in children and has been implicated as a major contributor to both morbidity and mortality. This study the first to be done in this setting, was aimed at comparing the growth of HIV infected children to that of non-infected children in two referral health facilities in Yaoundé, Cameroon.

Methods: A prospective case control study was carried out on 39 HIV infected children in two referral hospitals and followed up for a period of 12 months.

Frequent failure of adolescent booster responses to tetanus toxoid despite infant immunization: waning of infancy-induced immune memory?

To define the capacity of a tetanus toxoid booster to reactivate infant-triggered immunity, anti-tetanus antibodies were assessed before and after boosting 162 adolescents and 219 children from Mfou (Cameroon). Among 63 adolescents with 3 recorded dose of infant DTP, 29/63 (46%) responded with a > or =4-fold increase of antibody titers, 35/63 (55%) reaching the 0.10UI/ml threshold.

Growing skull fractures.

Introduction: Growing skull fractures are a rare complication of head injuries (Ersahin et al. in Neurosurg Rev 23:139-144, 2000; Hayashi et al. in Childs Nerv Syst 13:349-351, 1997; Ramamurthi and Kalyanaraman in Neurosurgery 32:427-430, 1970; Zegers et al.