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© A-M. Pais-Correia, M-I. Thoulouze, A. Alcover, A. Gessain
Mise en évidence de structures de type "biofilm ", formées par le rétrovirus HTLV-1 générés par des cellules infectées (cellules du haut), qui ont été transmis à un autre lymphocyte (cellule du bas). Micrographie en microscopie électronique à balayage. Image colorisée.
Publication : Viruses

Epidemiology and Genetic Variability of HHV-8/KSHV among Rural Populations and Kaposi’s Sarcoma Patients in Gabon, Central Africa. Review of the Geographical Distribution of HHV-8 K1 Genotypes in Africa.

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Viruses - 25 Jan 2021

Mamimandjiami AI, Mouinga-Ondémé A, Ramassamy JL, Djuicy DD, Afonso PV, Mahé A, Lekana-Douki JB, Cassar O, Gessain A,

Link to Pubmed [PMID] – 33503816

Link to DOI – 17510.3390/v13020175

Viruses 2021 Jan; 13(2):

Human herpesvirus 8 (HHV-8) is the etiological agent of all forms of Kaposi’s sarcoma (KS). K1 gene studies have identified five major molecular genotypes with geographical clustering. This study described the epidemiology of HHV-8 and its molecular diversity in Gabon among Bantu and Pygmy adult rural populations and KS patients. Plasma antibodies against latency-associated nuclear antigens (LANA) were searched by indirect immunofluorescence. Buffy coat DNA samples were subjected to polymerase chain reaction (PCR) to obtain a K1 gene fragment. We studied 1020 persons; 91% were Bantus and 9% Pygmies. HHV-8 seroprevalence was 48.3% and 36.5% at the 1:40 and 1:160 dilution thresholds, respectively, although the seroprevalence of HHV-8 is probably higher in Gabon. These seroprevalences did not differ by sex, age, ethnicity or province. The detection rate of HHV-8 K1 sequence was 2.6% by PCR. Most of the 31 HHV-8 strains belonged to the B genotype (24), while the remaining clustered within the A5 subgroup (6) and one belonged to the F genotype. Additionally, we reviewed the K1 molecular diversity of published HHV-8 strains in Africa. This study demonstrated a high seroprevalence of HHV-8 in rural adult populations in Gabon and the presence of genetically diverse strains with B, A and also F genotypes.

https://pubmed.ncbi.nlm.nih.gov/33503816