Risque de transmission de certains arbovirus à travers le don de sang à Bamako / Risk of transmission of certain arbovirus through blood donation in the city of Bamako

Introduction. Au Mali, le dépistage de certains virus tels que la dengue, Zika et la fièvre de la vallée du Rift n'est pas systématique au centre national de transfusion sanguine (CNTS). Le risque peut être considérable en raison de leurs courtes périodes de virémie asymptomatique dans la population dont l'incidence est variable et parfois extrêmement élevée. Cette étude avait pour objectif d'explorer la possibilité de transmission de certains arbovirus à travers le don de sang au CNTS de Bamako. Méthodes. Il s'agissait d'une étude transversale, de juillet 2019 à juin 2020 à Bamako. Au total deux cents (200) donneurs de sang du CNTS ont été inclus. Les examens ont été réalisés au Centre d'Infectiologie Charles Mérieux (CICM) de Bamako avec le dépistage du génome des virus responsables de la Dengue, de la fièvre de la Vallée du Rift, et du Zika à l'aide de la technique de la RT-PCR en temps réel. Le Test de Dépistage Rapide (TDR) a été utilisé pour la détection des anticorps IgG et IgM spécifiques de la Dengue. Résultats. Le sexe masculin représente 84% (168/200). Le TDR a détecté 4,5% (9/200) de Dengue IgG positifs et aucun cas de Dengue IgM positif. La technique de RT-PCR n'a détecté aucun des trois virus. Conclusion. Cette étude prouve que le risque de transmission de certains arbovirus à travers le don de sang existe, mais il semble être minime au CNTS de Bamako

Background. In Mali, screening for certain viruses such as dengue, Zika, and Rift Valley fever is not systematic at the national blood transfusion center (CNTS). The risk can be considerable due to their short periods of asymptomatic viremia in the population with variable and sometimes extremely high incidence. The objective of this study was to explore the possibility of transmission of certain arboviruses through blood donation at the CNTS of Bamako. Methods. This was a cross-sectional study, from July 2019 to June 2020 in Bamako. A total of two hundred (200) blood donors from the CNTS were included. The examinations were performed at the Centre d'Infectiologie Charles Mérieux (CICM) in Bamako with the screening of the genome of viruses responsible for Dengue, Rift Valley fever, and Zika using the real-time RT-PCR technique. The Rapid Screening Test (RST) was used for the detection of Dengue-specific IgG and IgM antibodies. Results. Male sex represented 84% (168/200). The RDT detected 4.5% (9/200) of IgG positive Dengue and no IgM positive Dengue cases. The RT-PCR technique did not detect any of the three viruses. Conclusion. This study proves that the risk of transmission of certain arboviruses through blood donation exists, but it seems to be minimal at the CNTS of Bamako.

Knowledge and attitudes of health workers in bouake, Cote d'ivoire on zika virus disease in the context of a global epidemic

Since January, 2012, the Pacific region has faced a heavy burden of concurrent epidemics of dengue, chikungunya, and zika virus infections. In 2016, WHO developed a global response strategic framework to ensure that zika virus is a priority and accelerated area of public health research. This study conducted in Bouaké (Côte d'Ivoire) is part of this framework. The main objective was to assess the knowledge and attitudes of health workers working there on the zika virus disease in order to consider a better preparation and response to a possible epidemic in Côte d'Ivoire. Cross-sectional study covering the period from October 2016 to March 2017 was used here. The sampling was comprehensive and included interviews with 258 persons. Subjects were interviewed using a questionnaire edited and adapted from the CAP questionnaire developed by WHO in 2016. People with prior knowledge of the zika virus disease represented 66.3% of the health workers surveyed. Their level of knowledge was insufficient in 83.5% of cases. Their attitudes were good in 51.5% of cases. In the authors' final model, the exercise structure which was adjusted to the level of education and the corporation significantly influenced health workers' attitudes toward illness. Health workers in public settings appeared to have a better attitude compared to their private colleagues (adjusted OR = 4.88; CI: 2.37-10.03; p-value:0.000). The zika virus disease has attracted the attention of the medical community during the 2014-2016 period. This attention, while mitigated by the West African Ebola virus epidemic, deserves to be highlighted.

A review on the incidence, interaction, and future perspective on Zika Virus

Zika virus(ZIKV) belongs to the family Flaviviridae and genus Flavivirus. It is a single-stranded positive-sense ribonucleic acid(RNA)virus, has its origin traced to Zika forest in Uganda. Its infection leads to ZIKV fever, characterized by arthralgia, myalgia, rash,conjunctivitis, and asthenia. Clinical presentation of the infection is nonspecific and may often be confused with symptoms of other flaviviral diseases (dengue, West Nile [WN], and chikungunya). Recently, ZIKV has been associated with congenital malformations and neurological complications such as microcephaly and Guillain­Barre' syndrome. The viral tropism revealed an infection of the skin fibroblasts, keratinocytes, and immature dendritic cells through enhanced expression of dendritic cell­specific intracellular adhesion molecule 3­grabbing nonintegrin or anexelecto (Greekword: 'uncontrolled') and tyrosine protein kinase receptor 3 systems. Silencing of T-cell immunoglobulin (Ig) and mucin domain 1(TIM-1) and AXL RNAs has shown blockage of viral entry through their anti-TIM-1 and anti-AXL antibodies, hence serving as a potential target for ZIKV drug development. Biotechnological approaches targeted toward ZIKV vector control include the development of transgenic mosquitoes to disrupt the genome pool of wild strains and use of an endosymbiotic bacterium to prevent replication of arboviruses within its vector. Other approaches include the use of gene drive and exploration of the genetic redundancy to disrupt the receptors used by the virus to gain entry into its host. It is also imperative to explore the modality through which neutralizing antibodies block this viral infection as this may prove as a potential target to arrest the viral life cycle