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  1. Article ; Online: Need of entomological criteria to assess zero transmission of gambiense HAT.

    Solano, Philippe

    PLoS neglected tropical diseases

    2021  Volume 15, Issue 3, Page(s) e0009235

    MeSH term(s) Animals ; Entomology/methods ; Epidemiological Monitoring ; Humans ; Insect Vectors ; Trypanosoma brucei gambiense ; Trypanosomiasis, African/prevention & control ; Trypanosomiasis, African/transmission ; Tsetse Flies
    Language English
    Publishing date 2021-03-25
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 2429704-5
    ISSN 1935-2735 ; 1935-2727
    ISSN (online) 1935-2735
    ISSN 1935-2727
    DOI 10.1371/journal.pntd.0009235
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  2. Article ; Online: The cost of tsetse control using 'Tiny Targets' in the sleeping sickness endemic forest area of Bonon in Côte d'Ivoire: Implications for comparing costs across different settings.

    Courtin, Fabrice / Kaba, Dramane / Rayaisse, Jean-Baptiste / Solano, Philippe / Torr, Steve J / Shaw, Alexandra P M

    PLoS neglected tropical diseases

    2022  Volume 16, Issue 1, Page(s) e0010033

    Abstract: Background: Work to control the gambiense form of human African trypanosomiasis (gHAT), or sleeping sickness, is now directed towards ending transmission of the parasite by 2030. In order to supplement gHAT case-finding and treatment, since 2011 tsetse ... ...

    Abstract Background: Work to control the gambiense form of human African trypanosomiasis (gHAT), or sleeping sickness, is now directed towards ending transmission of the parasite by 2030. In order to supplement gHAT case-finding and treatment, since 2011 tsetse control has been implemented using Tiny Targets in a number of gHAT foci. As this intervention is extended to new foci, it is vital to understand the costs involved. Costs have already been analysed for the foci of Arua in Uganda and Mandoul in Chad. This paper examines the costs of controlling Glossina palpalis palpalis in the focus of Bonon in Côte d'Ivoire from 2016 to 2017.
    Methodology/principal findings: Some 2000 targets were placed throughout the main gHAT transmission area of 130 km2 at a density of 14.9 per km2. The average annual cost was USD 0.5 per person protected, USD 31.6 per target deployed of which 12% was the cost of the target itself, or USD 471.2 per km2 protected. Broken down by activity, 54% was for deployment and maintenance of targets, 34% for tsetse surveys/monitoring and 12% for sensitising populations.
    Conclusions/significance: The cost of tsetse control per km2 of the gHAT focus protected in Bonon was more expensive than in Chad or Uganda, while the cost per km2 treated, that is the area where the targets were actually deployed, was cheaper. Per person protected, the Bonon cost fell between the two, with Uganda cheaper and Chad more expensive. In Bonon, targets were deployed throughout the protected area, because G. p. palpalis was present everywhere, whereas in Chad and Uganda G. fuscipes fuscipes was found only the riverine fringing vegetation. Thus, differences between gHAT foci, in terms of tsetse ecology and human geography, impact on the cost-effectiveness of tsetse control. It also demonstrates the need to take into account both the area treated and protected alongside other impact indicators, such as the cost per person protected.
    MeSH term(s) Animals ; Chad/epidemiology ; Cote d'Ivoire/epidemiology ; Endemic Diseases/prevention & control ; Forests ; Humans ; Insect Control/economics ; Insect Control/methods ; Insect Vectors ; Insecticides/pharmacology ; Trypanosoma brucei gambiense ; Trypanosomiasis, African/epidemiology ; Trypanosomiasis, African/prevention & control ; Trypanosomiasis, African/transmission ; Tsetse Flies ; Uganda/epidemiology
    Chemical Substances Insecticides
    Language English
    Publishing date 2022-01-05
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2429704-5
    ISSN 1935-2735 ; 1935-2735
    ISSN (online) 1935-2735
    ISSN 1935-2735
    DOI 10.1371/journal.pntd.0010033
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  3. Article ; Online: Contrôle, élimination, éradication : où en est-on dans les MTN ? Journée scientifique de la SFMTSI du 25 novembre 2021.

    Chandenier, Jacques / Chippaux, Jean-Philippe / Gazin, Pierre / Jannin, Jean / Solano, Philippe

    Medecine tropicale et sante internationale

    2021  Volume 1, Issue 4

    Title translation Control, elimination, eradication: Where do we stand with NTDs? Scientific day of the SFMTSI, 25 November 2021.
    MeSH term(s) Humans ; Neglected Diseases/epidemiology ; Neural Tube Defects ; Tropical Medicine
    Language French
    Publishing date 2021-12-10
    Publishing country France
    Document type Journal Article
    ISSN 2778-2034
    ISSN (online) 2778-2034
    DOI 10.48327/mtsi.2021.189
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: Enhancing research integration to improve One Health actions: learning lessons from neglected tropical diseases experiences.

    Rotureau, Brice / Waleckx, Etienne / Jamonneau, Vincent / Solano, Philippe / Molia, Sophie / Debré, Patrice / Dellagi, Koussay / Morand, Serge

    BMJ global health

    2022  Volume 7, Issue 6

    MeSH term(s) Humans ; Neglected Diseases/prevention & control ; One Health ; Tropical Medicine
    Language English
    Publishing date 2022-06-10
    Publishing country England
    Document type Journal Article
    ISSN 2059-7908
    ISSN 2059-7908
    DOI 10.1136/bmjgh-2022-008881
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  5. Article ; Online: Limited impact of vector control on the population genetic structure of Glossina fuscipes fuscipes from the sleeping sickness focus of Maro, Chad.

    Ravel, Sophie / Ségard, Adeline / Mollo, Brahim Guihini / Mahamat, Mahamat Hissène / Argiles-Herrero, Rafael / Bouyer, Jérémy / Rayaisse, Jean-Baptiste / Solano, Philippe / Pèka, Mallaye / Darnas, Justin / Belem, Adrien Marie Gaston / Yoni, Wilfrid / Noûs, Camille / de Meeûs, Thierry

    Parasite (Paris, France)

    2024  Volume 31, Page(s) 13

    Abstract: Tsetse flies (genus Glossina) transmit deadly trypanosomes to human populations and domestic animals in sub-Saharan Africa. Some foci of Human African Trypanosomiasis due to Trypanosoma brucei gambiense (g-HAT) persist in southern Chad, where a program ... ...

    Title translation Impact limité de la lutte antivectorielle sur la structure des populations de Glossina fuscipes fuscipes dans le foyer de la maladie du sommeil de Maro, Tchad.
    Abstract Tsetse flies (genus Glossina) transmit deadly trypanosomes to human populations and domestic animals in sub-Saharan Africa. Some foci of Human African Trypanosomiasis due to Trypanosoma brucei gambiense (g-HAT) persist in southern Chad, where a program of tsetse control was implemented against the local vector Glossina fuscipes fuscipes in 2018 in Maro. We analyzed the population genetics of G. f. fuscipes from the Maro focus before control (T0), one year (T1), and 18 months (T2) after the beginning of control efforts. Most flies captured displayed a local genetic profile (local survivors), but a few flies displayed outlier genotypes. Moreover, disturbance of isolation by distance signature (increase of genetic distance with geographic distance) and effective population size estimates, absence of any genetic signature of a bottleneck, and an increase of genetic diversity between T0 and T2 strongly suggest gene flows from various origins, and a limited impact of the vector control efforts on this tsetse population. Continuous control and surveillance of g-HAT transmission is thus recommended in Maro. Particular attention will need to be paid to the border with the Central African Republic, a country where the entomological and epidemiological status of g-HAT is unknown.
    MeSH term(s) Animals ; Humans ; Trypanosomiasis, African/epidemiology ; Trypanosomiasis, African/prevention & control ; Tsetse Flies/genetics ; Chad/epidemiology ; Trypanosoma brucei gambiense/genetics ; Animals, Domestic ; Spiders
    Language English
    Publishing date 2024-03-06
    Publishing country France
    Document type Journal Article
    ZDB-ID 1187629-3
    ISSN 1776-1042 ; 1252-607X
    ISSN (online) 1776-1042
    ISSN 1252-607X
    DOI 10.1051/parasite/2024013
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Response to the Comments of J.S. Lord.

    De Meeûs, Thierry / Ravel, Sophie / Solano, Philippe / Bouyer, Jérémy

    Trends in parasitology

    2019  Volume 35, Issue 10, Page(s) 742–743

    MeSH term(s) Animals ; Insect Control ; Trypanosomiasis, African ; Tsetse Flies
    Language English
    Publishing date 2019-08-17
    Publishing country England
    Document type Letter ; Comment
    ZDB-ID 2036227-4
    ISSN 1471-5007 ; 1471-4922
    ISSN (online) 1471-5007
    ISSN 1471-4922
    DOI 10.1016/j.pt.2019.07.009
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  7. Article ; Online: Negative Density-dependent Dispersal in Tsetse Flies: A Risk for Control Campaigns?

    De Meeûs, Thierry / Ravel, Sophie / Solano, Philippe / Bouyer, Jérémy

    Trends in parasitology

    2019  Volume 35, Issue 8, Page(s) 615–621

    Abstract: Tsetse flies are vectors of parasites that cause diseases responsible for significant economic losses and health issues in sub-Saharan Africa, including sleeping sickness in humans and nagana in domestic animals. Efficient vector-control campaigns ... ...

    Abstract Tsetse flies are vectors of parasites that cause diseases responsible for significant economic losses and health issues in sub-Saharan Africa, including sleeping sickness in humans and nagana in domestic animals. Efficient vector-control campaigns require good knowledge of the demographic parameters of the targeted populations. In the last decade, population genetics emerged as a convenient way to measure population densities and dispersal in tsetse flies. Here, by revealing a strong negative density-dependent dispersal in two dimensions, we suggest that control campaigns might unleash dispersal from untreated areas. If confirmed by direct measurement of dispersal before and after control campaigns, area-wide and/or sequential treatments of neighboring sites will be necessary to prevent this issue.
    MeSH term(s) Animal Distribution ; Animals ; Humans ; Insect Control/standards ; Insect Vectors/physiology ; Risk Assessment ; Trypanosomiasis, African/prevention & control ; Trypanosomiasis, African/transmission ; Tsetse Flies/parasitology ; Tsetse Flies/physiology
    Language English
    Publishing date 2019-06-11
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 2036227-4
    ISSN 1471-5007 ; 1471-4922
    ISSN (online) 1471-5007
    ISSN 1471-4922
    DOI 10.1016/j.pt.2019.05.007
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    In stock of ZB MED Cologne/Königswinter

    Zs.B 2898: Show issues Location:
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  8. Article ; Online: Sleeping sickness in the historical focus of forested Guinea

    Courtin Fabrice / Camara Oumou / Camara Mamadou / Kagbadouno Moïse / Bucheton Bruno / Solano Philippe / Jamonneau Vincent

    Parasite, Vol 26, p

    update using a geographically based method

    2019  Volume 61

    Abstract: In 2017, 1447 new cases of Human African Trypanosomiasis (HAT) were reported, which reflects considerable progress towards the World Health Organisation’s target of eliminating HAT as a public health problem by 2020. However, current epidemiological data ...

    Abstract In 2017, 1447 new cases of Human African Trypanosomiasis (HAT) were reported, which reflects considerable progress towards the World Health Organisation’s target of eliminating HAT as a public health problem by 2020. However, current epidemiological data are still lacking for a number of areas, including historical HAT foci. In order to update the HAT situation in the historical focus of forested Guinea, we implemented a geographically based methodology: Identification of Villages at Risk (IVR). The methodology is based on three sequential steps: Desk-based IVR (IVR-D), which selects villages at risk of HAT on the basis of HAT archives and geographical items; Field-based IVR (IVR-F), which consists in collecting additional epidemiological and geographical information in the field in villages at risk; and to be Medically surveyed IVR (IVR-M), a field data analysis through a Geographic Information System (GIS), to compile a list of the villages most at risk of HAT, suitable to guide active screening and passive surveillance. In an area of 2385 km2 with 1420,530 inhabitants distributed in 1884 settlements, 14 villages with a population of 11,236 inhabitants were identified as most at risk of HAT and selected for active screening. Although no HAT cases could be confirmed, subjects that had come into contact with Trypanosoma brucei gambiense were identified and two sentinel sites were chosen to implement passive surveillance. IVR, which could be applied to any gambiense areas where the situation needs to be clarified, could help to reach the objective of HAT elimination.
    Keywords sleeping sickness ; trypanosoma brucei gambiense ; guinea ; geography ; risk ; elimination ; Infectious and parasitic diseases ; RC109-216
    Subject code 910
    Language English
    Publishing date 2019-01-01T00:00:00Z
    Publisher EDP Sciences
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  9. Article ; Online: The francophone network on neglected tropical diseases.

    Jannin, Jean / Solano, Philippe / Quick, Isadora / Debre, Patrice

    PLoS neglected tropical diseases

    2017  Volume 11, Issue 8, Page(s) e0005738

    MeSH term(s) Communicable Disease Control/methods ; Communicable Diseases ; France ; Health Information Exchange ; Humans ; Neglected Diseases/therapy ; Tropical Medicine
    Language English
    Publishing date 2017-08-31
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2429704-5
    ISSN 1935-2735 ; 1935-2735
    ISSN (online) 1935-2735
    ISSN 1935-2735
    DOI 10.1371/journal.pntd.0005738
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  10. Article ; Online: Vector competence of sterile male Glossina fuscipes fuscipes for Trypanosoma brucei brucei: implications for the implementation of the sterile insect technique in a sleeping sickness focus in Chad.

    Mahamat, Mahamat Hissene / Ségard, Adeline / Rayaisse, Jean-Baptiste / Argiles-Herrero, Rafael / Parker, Andrew Gordon / Solano, Philippe / Abd-Alla, Adly Mohamed Mohamed / Bouyer, Jérémy / Ravel, Sophie

    Parasites & vectors

    2023  Volume 16, Issue 1, Page(s) 111

    Abstract: Background: Human African trypanosomiasis (HAT) is a neglected tropical disease caused by Trypanosoma brucei gambiense transmitted by tsetse flies in sub-Saharan West Africa. In southern Chad the most active and persistent focus is the Mandoul focus, ... ...

    Abstract Background: Human African trypanosomiasis (HAT) is a neglected tropical disease caused by Trypanosoma brucei gambiense transmitted by tsetse flies in sub-Saharan West Africa. In southern Chad the most active and persistent focus is the Mandoul focus, with 98% of the reported human cases, and where African animal trypanosomosis (AAT) is also present. Recently, a control project to eliminate tsetse flies (Glossina fuscipes fuscipes) in this focus using the sterile insect technique (SIT) was initiated. However, the release of large numbers of sterile males of G. f. fuscipes might result in a potential temporary increase in transmission of trypanosomes since male tsetse flies are also able to transmit the parasite. The objective of this work was therefore to experimentally assess the vector competence of sterile males treated with isometamidium for Trypanosoma brucei brucei.
    Methods: An experimental infection was set up in the laboratory, mimicking field conditions: the same tsetse species that is present in Mandoul was used. A T. b. brucei strain close to T. b. gambiense was used, and the ability of the sterile male tsetse flies fed on blood with and without a trypanocide to acquire and transmit trypanosomes was measured.
    Results: Only 2% of the experimentally infected flies developed an immature infection (midgut) while none of the flies developed a metacyclic infection of T. b. brucei in the salivary glands. We did not observe any effect of the trypanocide used (isometamidium chloride at 100 mg/l) on the development of infection in the flies.
    Conclusions: Our results indicate that sterile males of the tested strain of G. f. fuscipes were unable to cyclically transmit T. b. brucei and might even be refractory to the infection. The data of the research indicate that the risk of cyclical transmission of T. brucei by sterile male G. f. fuscipes of the strain colonized at IAEA for almost 40 years appears to be small.
    MeSH term(s) Animals ; Male ; Humans ; Trypanosomiasis, African/epidemiology ; Trypanosomiasis, African/prevention & control ; Trypanosomiasis, African/parasitology ; Tsetse Flies/parasitology ; Trypanosoma brucei brucei ; Trypanocidal Agents ; Chad/epidemiology ; Trypanosoma ; Infertility, Male ; Insecta
    Chemical Substances Trypanocidal Agents
    Language English
    Publishing date 2023-03-22
    Publishing country England
    Document type Journal Article
    ZDB-ID 2409480-8
    ISSN 1756-3305 ; 1756-3305
    ISSN (online) 1756-3305
    ISSN 1756-3305
    DOI 10.1186/s13071-023-05721-4
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