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Article ; Online: COVID-19 And the african financial markets : Less infection, less economic impact ?

Del Lo, Gaye / Basséne, Théophile / Séne, Babacar

Finance research letters

2021 Volume 45, Page(s) 102148

Abstract: Has the relatively low number of COVID-19 cases and deaths saved Africa from the disease's economic and financial consequences ? This article assesses the impact of the pandemic on the volatility of major African stock markets using a panel data model. ... ...

Abstract	Has the relatively low number of COVID-19 cases and deaths saved Africa from the disease's economic and financial consequences ? This article assesses the impact of the pandemic on the volatility of major African stock markets using a panel data model. Like other financial markets worldwide, Africa's have been characterised by increased volatility during the pandemic. The markets appear to respond to the external shocks caused by the health crisis, and Google search volume activity related to the COVID-19 virus, which is treated here as a proxy for panic and fear, is associated with an increase in market volatility of around 7%. For health data, only increases in confirmed cases appear to impact the stability of African markets, and the relatively low fatality rate has had no influence on market dynamics. However, Political responses are associated with a drop in volatility, while the fear of global financial markets exacerbates it. These results have several implications in terms of risk management.
Language	English
Publishing date	2021-05-18
Publishing country	Netherlands
Document type	Journal Article
ISSN	1544-6131
ISSN (online)	1544-6131
DOI	10.1016/j.frl.2021.102148
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Overshooting of sovereign emerging eurobond yields in the context of COVID-19.

Sène, Babacar / Mbengue, Mohamed Lamine / Allaya, Mouhamad M

Finance research letters

2020 Volume 38, Page(s) 101746

Abstract: This paper illustrates the phenomenon of overshooting yields on eurobonds issued by emerging and developing countries in the context of COVID-19. Using panel data from 48 emerging and developing countries, the results show that daily reports of confirmed ...

Abstract	This paper illustrates the phenomenon of overshooting yields on eurobonds issued by emerging and developing countries in the context of COVID-19. Using panel data from 48 emerging and developing countries, the results show that daily reports of confirmed cases have led to increases in yields and announcements of international creditor assistance to developing and emerging countries, which have calmed investor concerns.
Keywords	covid19
Language	English
Publishing date	2020-09-02
Publishing country	Netherlands
Document type	Journal Article
ISSN	1544-6131
ISSN (online)	1544-6131
DOI	10.1016/j.frl.2020.101746
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Overshooting of sovereign emerging eurobond yields in the context of COVID-19

Sène, Babacar / Mbengue, Mohamed Lamine / Allaya, Mouhamad M.

Finance Research Letters

2020 , Page(s) 101746

Keywords	Finance ; covid19
Language	English
Publisher	Elsevier BV
Publishing country	us
Document type	Article ; Online
ISSN	1544-6123
DOI	10.1016/j.frl.2020.101746
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: Overshooting of sovereign emerging eurobond yields in the context of COVID-19

Sène, Babacar / Mbengue, Mohamed Lamine / Allaya, Mouhamad M

Financ Res Lett

Abstract	This paper illustrates the phenomenon of overshooting yields on eurobonds issued by emerging and developing countries in the context of COVID-19. Using panel data from 48 emerging and developing countries, the results show that daily reports of confirmed cases have led to increases in yields and announcements of international creditor assistance to developing and emerging countries, which have calmed investor concerns.
Keywords	covid19
Publisher	WHO
Document type	Article
Note	WHO #Covidence: #739821
Database	COVID19

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Article: Dengue vectors in Africa: A review.

Diallo, Diawo / Diouf, Babacar / Gaye, Alioune / NDiaye, El Hadji / Sene, Ndeye Marie / Dia, Ibrahima / Diallo, Mawlouth

Heliyon

2022 Volume 8, Issue 5, Page(s) e09459

Abstract: Dengue fever is a mosquito-borne-disease of growing public health importance in Africa. The continuous increase of number and frequency of outbreaks of dengue fever, especially in urban area in Africa underline the need to review the current data ... ...

Abstract	Dengue fever is a mosquito-borne-disease of growing public health importance in Africa. The continuous increase of number and frequency of outbreaks of dengue fever, especially in urban area in Africa underline the need to review the current data available on vectors involved in dengue virus transmission in Africa. Here, we summarized the available data on vectors involved in the transmission of dengue virus in the sylvatic and urban environments, vertical transmission, vector competence studies, and vector control strategies used in Africa. The virus was isolated mainly from
Language	English
Publishing date	2022-05-17
Publishing country	England
Document type	Journal Article
ZDB-ID	2835763-2
ISSN	2405-8440
ISSN	2405-8440
DOI	10.1016/j.heliyon.2022.e09459
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Dengue vectors in Africa

Diawo Diallo / Babacar Diouf / Alioune Gaye / El hadji NDiaye / Ndeye Marie Sene / Ibrahima Dia / Mawlouth Diallo

Heliyon, Vol 8, Iss 5, Pp e09459- (2022)

A review

2022

Abstract	Dengue fever is a mosquito-borne-disease of growing public health importance in Africa. The continuous increase of number and frequency of outbreaks of dengue fever, especially in urban area in Africa underline the need to review the current data available on vectors involved in dengue virus transmission in Africa. Here, we summarized the available data on vectors involved in the transmission of dengue virus in the sylvatic and urban environments, vertical transmission, vector competence studies, and vector control strategies used in Africa. The virus was isolated mainly from Aedes furcifer, Ae. luteocephalus, and Ae. taylori in the sylvatic environment and from Ae. aegypti and Ae. albopictus in the urban areas. Prospective and urgently needed studies on vectors biology, behavior, and alternative control strategies are suggested.
Keywords	Dengue ; Mosquito vectors ; Sylvatic ; Urban ; Africa ; Science (General) ; Q1-390 ; Social sciences (General) ; H1-99
Language	English
Publishing date	2022-05-01T00:00:00Z
Publisher	Elsevier
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: Dengue vectors in Africa: A review

Diallo, Diawo / Diouf, Babacar / Gaye, Alioune / NDiaye, El hadji / Sene, Ndeye Marie / Dia, Ibrahima / Diallo, Mawlouth

Heliyon. 2022 May, v. 8, no. 5

2022

Abstract	Dengue fever is a mosquito-borne-disease of growing public health importance in Africa. The continuous increase of number and frequency of outbreaks of dengue fever, especially in urban area in Africa underline the need to review the current data available on vectors involved in dengue virus transmission in Africa. Here, we summarized the available data on vectors involved in the transmission of dengue virus in the sylvatic and urban environments, vertical transmission, vector competence studies, and vector control strategies used in Africa. The virus was isolated mainly from Aedes furcifer, Ae. luteocephalus, and Ae. taylori in the sylvatic environment and from Ae. aegypti and Ae. albopictus in the urban areas. Prospective and urgently needed studies on vectors biology, behavior, and alternative control strategies are suggested.
Keywords	Aedes furcifer ; Dengue virus ; dengue ; public health ; urban areas ; vector competence ; vector control ; virus transmission ; viruses ; Africa
Language	English
Dates of publication	2022-05
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	2835763-2
ISSN	2405-8440
ISSN	2405-8440
DOI	10.1016/j.heliyon.2022.e09459
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Feasibility and safety of integrating mass drug administration for helminth control with seasonal malaria chemoprevention among Senegalese children: a randomized controlled, observer-blind trial.

Malaria journal

2023 Volume 22, Issue 1, Page(s) 348

Abstract: Background: The overlap in the epidemiology of malaria and helminths has been identified as a potential area to exploit for the development of an integrated control strategy that may help to achieve elimination of malaria and helminths. A randomized, ... ...

Abstract	Background: The overlap in the epidemiology of malaria and helminths has been identified as a potential area to exploit for the development of an integrated control strategy that may help to achieve elimination of malaria and helminths. A randomized, controlled, observer-blind trial was conducted to assess the feasibility and safety of combining mass drug administration (MDA) for schistosomiasis and soil transmitted helminths (STH) with seasonal malaria chemoprevention (SMC) among children living in Senegal. Methods: Female and male children aged 1-14 years were randomized 1:1:1, to receive Vitamin A and Zinc on Day 0, followed by SMC drugs (sulfadoxine-pyrimethamine and amodiaquine) on Days 1-3 (control group); or praziquantel and Vitamin A on Day 0, followed by SMC drugs on Days 1-3 (treatment group 1); or albendazole and praziquantel on Day 0, followed by SMC drugs on Days 1-3 (treatment group 2). Safety assessment was performed by collecting adverse events from all children for six subsequent days following administration of the study drugs. Pre- and post-intervention, blood samples were collected for determination of haemoglobin concentration, malaria microscopy, and PCR assays. Stool samples were analyzed using Kato-Katz, Merthiolate-iodine-formalin and PCR methods. Urine filtration, PCR and circulating cathodic antigen tests were also performed. Results: From 9 to 22 June 2022, 627 children aged 1-14 years were randomized into the three groups described above. Mild, transient vomiting was observed in 12.6% (26/206) of children in treatment group 2, in 10.6% (22/207) in group 1, and in 4.2% (9/214) in the control group (p = 0.005). Pre-intervention, the geometric mean value of Plasmodium falciparum parasite density was highest among children who received albendazole, praziquantel with SMC drugs. Post-intervention, the parasite density was highest among children who received SMC drugs only. Children who received praziquantel and SMC drugs had a lower risk of developing severe anaemia than their counterparts who received SMC drugs alone (OR = 0.81, 95% CI 0.13-5.00, p = 0.63). Conclusions: Integration of MDA for helminths with SMC drugs was safe and feasible among Senegalese children. These findings support further evaluation of the integrated control model. Trial registration: The study is registered at Clinical Trial.gov NCT05354258.
MeSH term(s)	Animals ; Humans ; Child ; Male ; Female ; Antimalarials/adverse effects ; Praziquantel/adverse effects ; Albendazole/adverse effects ; Mass Drug Administration ; Seasons ; Feasibility Studies ; Vitamin A/therapeutic use ; Malaria/epidemiology ; Helminths ; Chemoprevention/adverse effects ; Chemoprevention/methods
Chemical Substances	Antimalarials ; Praziquantel (6490C9U457) ; Albendazole (F4216019LN) ; Vitamin A (11103-57-4)
Language	English
Publishing date	2023-11-13
Publishing country	England
Document type	Randomized Controlled Trial ; Journal Article
ZDB-ID	2091229-8
ISSN	1475-2875 ; 1475-2875
ISSN (online)	1475-2875
ISSN	1475-2875
DOI	10.1186/s12936-023-04784-z
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Morphology and taxonomic status of Aedes aegypti populations across Senegal.

Diouf, Babacar / Dia, Ibrahima / Sene, Ndeye Marie / Ndiaye, El Hadji / Diallo, Mawlouth / Diallo, Diawo

PloS one

2020 Volume 15, Issue 11, Page(s) e0242576

Abstract: Aedes aegypti is the primary vector of dengue, Zika, yellow fever and chikungunya viruses to humans. In Africa, two subspecies, Ae. aegypti aegypti (Aaa) and Ae. aegypti formosus (Aaf) have been described. Until very recently, it was considered that the ... ...

Abstract	Aedes aegypti is the primary vector of dengue, Zika, yellow fever and chikungunya viruses to humans. In Africa, two subspecies, Ae. aegypti aegypti (Aaa) and Ae. aegypti formosus (Aaf) have been described. Until very recently, it was considered that the two forms were sympatric in East Africa and that only Aaf was present in Central and West Africa. However, recent data suggests that Aaa was also common in Senegal without any clear evidence of genetic differences with Aaf. This study was carried out in different Ae. aegypti populations from Senegal to better clarify their taxonomic status. The larvae, pupae and eggs were collected between July and September 2018 and reared individually to adult stage. For each population, F1 progeny from eggs laid by a single female F0 were reared as sibling samples. The number of pale scales on the first abdominal tergite (T1) and the basal part of the second tergite (T2) were counted. Individuals with no pale scale on T1 were classified as Aaf while those with at least one pale scale on this tergite were classified as Aaa. The morphological variations within families of Aaf were studied across 4 generations. In total, 2400 individuals constituting 240 families were identified, of which 42.5% were heterogeneous (families with both forms). Multivariate statistical analysis of variance including T1 and T2 data together showed that populations were significantly different from each other. Statistical analysis of T1 alone showed a similarity between populations from the southeast while variations were observed within northwest population. The analysis of family composition across generations showed the presence of Aaa and Aaf forms in each generation. The classification of Ae. aegypti into two subspecies is invalid in Senegal. Populations exhibit morphological polymorphism at the intra-family level that could have biological and epidemiological impacts.
MeSH term(s)	Aedes/classification ; Aedes/pathogenicity ; Aedes/virology ; Africa, Eastern ; Africa, Western ; Animals ; Disease Vectors ; Genetic Variation/genetics ; Humans ; Mosquito Vectors/classification ; Mosquito Vectors/genetics ; Phylogeny ; Senegal/epidemiology ; Yellow Fever/epidemiology ; Yellow Fever/genetics ; Zika Virus/genetics ; Zika Virus Infection/epidemiology ; Zika Virus Infection/genetics
Language	English
Publishing date	2020-11-18
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ISSN	1932-6203
ISSN (online)	1932-6203
DOI	10.1371/journal.pone.0242576
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Morphology and taxonomic status of Aedes aegypti populations across Senegal.

Babacar Diouf / Ibrahima Dia / Ndeye Marie Sene / El Hadji Ndiaye / Mawlouth Diallo / Diawo Diallo

PLoS ONE, Vol 15, Iss 11, p e

2020 Volume 0242576

Abstract	Aedes aegypti is the primary vector of dengue, Zika, yellow fever and chikungunya viruses to humans. In Africa, two subspecies, Ae. aegypti aegypti (Aaa) and Ae. aegypti formosus (Aaf) have been described. Until very recently, it was considered that the two forms were sympatric in East Africa and that only Aaf was present in Central and West Africa. However, recent data suggests that Aaa was also common in Senegal without any clear evidence of genetic differences with Aaf. This study was carried out in different Ae. aegypti populations from Senegal to better clarify their taxonomic status. The larvae, pupae and eggs were collected between July and September 2018 and reared individually to adult stage. For each population, F1 progeny from eggs laid by a single female F0 were reared as sibling samples. The number of pale scales on the first abdominal tergite (T1) and the basal part of the second tergite (T2) were counted. Individuals with no pale scale on T1 were classified as Aaf while those with at least one pale scale on this tergite were classified as Aaa. The morphological variations within families of Aaf were studied across 4 generations. In total, 2400 individuals constituting 240 families were identified, of which 42.5% were heterogeneous (families with both forms). Multivariate statistical analysis of variance including T1 and T2 data together showed that populations were significantly different from each other. Statistical analysis of T1 alone showed a similarity between populations from the southeast while variations were observed within northwest population. The analysis of family composition across generations showed the presence of Aaa and Aaf forms in each generation. The classification of Ae. aegypti into two subspecies is invalid in Senegal. Populations exhibit morphological polymorphism at the intra-family level that could have biological and epidemiological impacts.
Keywords	Medicine ; R ; Science ; Q
Subject code	590
Language	English
Publishing date	2020-01-01T00:00:00Z
Publisher	Public Library of Science (PLoS)
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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