Zekiba Tarnagda
University of Ouagadougou
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Archives of Virology | 2009
Chantal J. Snoeck; Mariette F. Ducatez; Ademola A. Owoade; Olufemi O. Faleke; Bello R. Alkali; Marc C. Tahita; Zekiba Tarnagda; Jean-Bosco Ouédraogo; Issoufou Maikano; Patrick Okwen Mbah; Jacques R. Kremer; Claude P. Muller
Forty-four Newcastle disease virus (NDV) strains, obtained between 2002 and 2007 from different poultry species in Nigeria, Niger, Burkina Faso and Cameroon, were phylogenetically analysed based on partial F sequences. Lineage 2 viruses were genetically identical or similar to the locally used LaSota vaccine strain and were mostly detected in commercial farms. Lineage 1, 3 and 4 strains were only sporadically found, and their origin was less clear. Twenty-one strains from backyard farms and live bird markets formed three new clusters within lineage 5, tentatively named 5f, 5g and 5h. All of these strains were predicted to be virulent based on their F protein cleavage site sequence. Minimal genetic distances between new and previously established sublineages ranged from 9.4 to 15.9%, and minimal distances between the new sublineages were 11.5 to 17.3%. Their high genetic diversity and their presence in three different Sub-Saharan countries suggest that these new sublineages represent the NDV variants indigenous to West Africa.
Journal of Clinical Microbiology | 2009
Judith M. Hübschen; Zefira Mihneva; Andreas Mentis; François Schneider; Yair Aboudy; Zehava Grossman; H Rudich; Kalia Kasymbekova; Inna Sarv; Jasminka Nedeljkovic; Marc C. Tahita; Zekiba Tarnagda; Jean-Bosco Ouédraogo; A. G. Gerasimova; T. N. Moskaleva; Nina T. Tikhonova; Nazibrola Chitadze; Joseph C. Forbi; Adedayo O. Faneye; Jesse A. Otegbayo; Emilie Charpentier; Claude P. Muller
ABSTRACT Phylogenetic analysis of 166 human parvovirus B19 sequences from 11 different countries attributed 91.57% to genotype 1, 5.42% to genotype 3b, and 3.01% to genotype 3a. Very similar viruses of genotype 1 circulated widely in Europe and Israel. Genotype 3b seems to show an increasing spread outside of Africa.
The Journal of Infectious Diseases | 2006
Judith E. Mueller; Seydou Yaro; Yves Traoré; Lassana Sangaré; Zekiba Tarnagda; Berthe-Marie Njanpop-Lafourcade; Ray Borrow; Bradford D. Gessner
OBJECTIVES We sought to describe Neisseria meningitidis immunity and its association with pharyngeal carriage in Burkina Faso, where N. meningitidis serogroup W-135 and serogroup A disease are hyperendemic and most of the population received polysaccharide A/C vaccine during 2002. METHODS We collected oropharyngeal swab samples from healthy residents of Bobo-Dioulasso (4-14 years old, n=238; 15-29 years old, n=250) monthly during February-June 2003; N. meningitidis isolates were analyzed using polymerase chain reaction and serogrouped using immune sera. Serum samples were collected at the first and last clinic visit and analyzed for anti-A, anti-C, anti-W-135, and anti-Y immunoglobulin G (IgG) concentrations and anti-A and anti-W-135 bactericidal titers. RESULTS N. meningitidis was carried at least once by 18% of participants; this carriage included strains from serogroups W-135 (5%) and Y and X (both <1%) but not from serogroups A, B, or C. At baseline, the prevalence of putatively protective specific IgG concentrations (> or =2 microg/mL) and bactericidal titers (> or =8) was 85% and 54%, respectively, against serogroup A, and 6% and 22%, respectively, against serogroup W-135. Putatively protective anti-W-135 IgG concentrations and bactericidal titers were of short duration and were not associated with carriage. CONCLUSION N. meningitidis serogroup W-135 strains did not induce immunity, despite their circulation. Carriage of serogroup A strains was rare despite the hyperendemic incidence of serogroup A meningitis during 2003 in Bobo-Dioulasso. A vaccine that includes serogroup W-135 antigen and eliminates serogroup A carriage is needed for sub-Saharan Africa.
Emerging Infectious Diseases | 2007
Mariette F. Ducatez; Zekiba Tarnagda; Marc C. Tahita; Adama Sow; Sébastien De Landtsheer; Brandon Z. Londt; Ian H. Brown; Albert D. M. E. Osterhaus; Ron A. M. Fouchier; Jean-Bosco Ouédraogo; Claude P. Muller
Genetic analysis of highly pathogenic avian influenza (H5N1) viruses from poultry and hooded vultures in Burkina Faso shows that these viruses belong to 1 of 3 sublineages initially found in Nigeria and later in other African countries. Hooded vultures could potentially be vectors or sentinels of influenza subtype H5N1, as are cats and swans elsewhere.
Emerging Infectious Diseases | 2007
Judith E. Mueller; Lassana Sangaré; Berthe-Marie Njanpop-Lafourcade; Zekiba Tarnagda; Yves Traoré; Seydou Yaro; Ray Borrow; Bradford D. Gessner; Pierre Nicolas
Meningococcal serogroups are genetically diverse and short-lived in the African meningitis belt.
Tropical Medicine & International Health | 2008
Judith E. Mueller; Seydou Yaro; Yoann Madec; Paulin K. Somda; Régina S. Idohou; Berthe-Marie Njanpop Lafourcade; Aly Drabo; Zekiba Tarnagda; Lassana Sangaré; Yves Traoré; Arnaud Fontanet; Bradford D. Gessner
Objectives To evaluate risk factors for meningococcal carriage and carriage acquisition in the African meningitis belt, comparing epidemic serogroup A (NmA) to non‐epidemic serogroups.
Journal of Clinical Microbiology | 2014
Iris E. Andernach; Lukas V. Leiss; Zekiba Tarnagda; Marc C. Tahita; Jesse A. Otegbayo; Joseph C. Forbi; Sunday Omilabu; Ionela Gouandjika-Vasilache; Narcisse P Komas; Okwen P. Mbah; Claude P. Muller
ABSTRACT Hepatitis D virus (HDV) is a satellite of hepatitis B virus (HBV), and infection with this virus aggravates acute and chronic liver disease. While HBV seroprevalence is very high across sub-Saharan Africa, much less is known about HDV in the region. In this study, almost 2,300 blood serum samples from Burkina Faso (n = 1,131), Nigeria (n = 974), Chad (n = 50), and the Central African Republic (n = 118) were screened for HBV and HDV. Among 743 HBsAg-positive serum samples, 74 were positive for HDV antibodies and/or HDV RNA, with considerable differences in prevalence, ranging from <2% (pregnant women from Burkina Faso) to 50% (liver patients from Central African Republic). HDV seems to be much more common in chronic liver disease patients in the Central African Republic (CAR) than in similar cohorts in Nigeria. In a large nested mother-child cohort in Burkina Faso, the prevalence of HDV antibodies was 10 times higher in the children than in their mothers, despite similar HBsAg prevalences, excluding vertical transmission as an important route of infection. The genotyping of 16 full-length and 8 partial HDV strains revealed clade 1 (17/24) in three of the four countries, while clades 5 (5/24) and 6 (2/24) were, at least in this study, confined to Central Nigeria. On the amino acid level, almost all our clade 1 strains exhibited a serine at position 202 in the hepatitis D antigen, supporting the hypothesis of an ancient African HDV-1 subgroup. Further studies are required to understand the public health significance of the highly varied HDV prevalences in different cohorts and countries in sub-Saharan Africa.
BMC Infectious Diseases | 2013
Marc C. Tahita; Judith M. Hübschen; Zekiba Tarnagda; Da Ernest; Emilie Charpentier; Jacques R. Kremer; Claude P. Muller; Jean Bosco Ouedraogo
BackgroundDespite the serious consequences of rubella infection during early pregnancy, very little is known about the rubella seroprevalence in a number of African countries including Burkina Faso.MethodsBetween December 2007 and March 2008 serum samples were collected from 341 pregnant women in Bobo (n = 132, urban area) and Houndé (n = 209, rural area) and were tested for rubella-specific IgG antibodies with a commercial ELISA kit.ResultsAn overall seropositivity rate of 95.0% (324/341) was found, with a higher percentage in the urban population and in the oldest age group. Considering an antibody titer of at least 10 International Units per ml as protective, the overall immunity rate in the cohort of pregnant women was 93.3% (318/341).ConclusionsThe high overall seropositivity rate in the absence of routine immunization suggests a continuous transmission of endemic rubella virus in Burkina Faso, posing a threat to non-immune pregnant women.
PLOS Neglected Tropical Diseases | 2009
Hélène Carabin; Athanase Millogo; Nicolas Praet; Sennen Hounton; Zekiba Tarnagda; Rasmané Ganaba; Pierre Dorny; Pascal Nitiéma; Linda D. Cowan; Évaluation du Fardeau Économique de la Cysticercose Au Burkina Faso
Background There is limited published information on the prevalence of human cysticercosis in West Africa. The aim of this pilot study was to estimate the prevalence of Taenia solium cysticercosis antigens in residents of three villages in Burkina Faso. Methods/Principal Findings Three villages were selected: The village of Batondo, selected to represent villages where pigs are allowed to roam freely; the village of Pabré, selected to represent villages where pigs are usually confined; and the village of Nyonyogo, selected because of a high proportion of Muslims and limited pig farming. Clustered random sampling was used to select the participants. All participants were asked to answer an interview questionnaire on socio-demographic characteristics and to provide a blood sample. The sera were analysed using an AgELISA. The prevalence of “strong” seropositive results to the presence of antigens of the larval stages of T. solium was estimated as 10.3% (95%CI: 7.1%–14.3%), 1.4% (0.4%–3.5%) and 0.0% (0.0%–2.1%) in the 763 participants who provided a blood sample in Batondo, Pabré and Nyonyogo, respectively. The prevalence of “weak” seropositive test results to the presence of antigens of the larval stages of T. solium was 1.3% (0.3%–3.2%), 0.3% (0.0%–1.9%) and 4.5% (2.0%–8.8%) in Batondo, Pabré and Nyonyogo, respectively. The multivariate logistic regression, which included only Batondo and Pabré, showed that village, gender, and pork consumption history were associated with AgELISA seroprevalence. Conclusions/Significance This study illustrates two major points: 1) there can be large variation in the prevalence of human seropositivity to the presence of the larval stages of T. solium cysticercosis among rural areas of the same country, and 2) the serological level of the antigen, not just whether it is positive or negative, must be considered when assessing prevalence of human cysticercosis antigens.
Acta Neurologica Scandinavica | 2012
Pascal Nitiéma; Hélène Carabin; Sennen Hounton; Nicolas Praet; Linda D. Cowan; Rasmané Ganaba; C. Kompaoré; Zekiba Tarnagda; Pierre Dorny; Athanase Millogo; Éfécab
To estimate the association between the prevalence of epilepsy and potential risk factors in three Burkina Faso villages.