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22 results on '"Sagbohan, Hermann"'

1. Assessing the susceptibility and efficacy of traditional neurotoxic (pyrethroid) and new-generation insecticides (chlorfenapyr, clothianidin, and pyriproxyfen), on wild pyrethroid-resistant populations of Anopheles gambiae from southern Benin

Author

Zoungbédji, David Mahouton, Padonou, Germain Gil, Konkon, Alphonse Keller, Hougbe, Steve, Sagbohan, Hermann, Kpanou, Casimir, Salako, Albert Sourou, Ossè, Razaki, Aïkpon, Rock, Afoukou, Cyriaque, Sidick, Aboubakar, Akinro, Bruno, Chitou, Saïd, Gnanguénon, Virgile, Condo, Patrick, Hassani, Ahmed Saadani, Impoinvil, Daniel, and Akogbéto, Martin

Published
2023
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2. Field performance of three mosquito collection methods for assessing the entomological efficacy of dual-active ingredient long-lasting insecticidal nets

Author

Yovogan, Boulais, Adoha, Constantin J., Akinro, Bruno, Accrombessi, Manfred, Dangbénon, Edouard, Sidick, Aboubakar, Ossè, Razaki, Padonou, Gil G., Messenger, Louisa A., Fassinou, Arsène, Sagbohan, Hermann W., Agbangla, Clément, Djènontin, Armel, Odjo, Esdras M., Ngufor, Corine, Cook, Jackie, Protopopoff, Natacha, Sovi, Arthur, and Akogbéto, Martin C.

Published
2023
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3. What can be learned from the residual efficacy of three formulations of insecticides (pirimiphos-methyl, clothianidin and deltamethrin mixture, and clothianidin alone) in large-scale in community trial in North Benin, West Africa?

Author

Odjo, Esdras Mahoutin, Salako, Albert Sourou, Padonou, Germain Gil, Yovogan, Boulais, Adoha, Constantin Jésukèdè, Adjottin, Bruno, Sominahouin, André Aimé, Sovi, Arthur, Osse, Razaki, Kpanou, Casimir D., Sagbohan, Hermann W., Djenontin, Armel, Agbangla, Clement, and Akogbeto, Martin C.

Published
2023
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7. Efficacy of Pyrethroid–Pyriproxyfen and Pyrethroid–Chlorfenapyr Long-Lasting Insecticidal Nets (LLINs) for the Control of Non-Anopheles Mosquitoes: Secondary Analysis from a Cluster Randomised Controlled Trial (cRCT)

Author

Adoha, Constantin J., primary, Sovi, Arthur, additional, Yovogan, Boulais, additional, Akinro, Bruno, additional, Accrombessi, Manfred, additional, Dangbénon, Edouard, additional, Odjo, Esdras M., additional, Sagbohan, Hermann Watson, additional, Kpanou, Casimir Dossou, additional, Padonou, Gil G., additional, Messenger, Louisa A., additional, Agbangla, Clément, additional, Ngufor, Corine, additional, Cook, Jackie, additional, Protopopoff, Natacha, additional, and Akogbéto, Martin C., additional

Published
2023
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8. Assessing the susceptibility and efficacy of three public health, insecticides, chlorfenapyr, clothianidin, and pyriproxyfen, on wild pyrethroid-resistant populations of Anopheles gambiae s.l. from southern Benin

Author

Zoungbédji, David Mahouton, primary, Padonou, Germain Gil, additional, Konkon, Alphonse Keller, additional, Steve, Hougbe, additional, Sagbohan, Hermann, additional, Kpanou, Casimir, additional, Salako, Albert Sourou, additional, Ossè, Razaki, additional, Aïkpon, Rock, additional, Afoukou, Cyriaque, additional, Sidick, Aboubakar, additional, Akinro, Bruno, additional, Chitou, Saïd, additional, Gnanguénon, Virgile, additional, Condo, Patrick, additional, Hassani, Ahmed Saadani, additional, Impoinvil, Daniel, additional, and Akogbéto, Martin, additional

Published
2023
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10. Trophic preferences of Anopheles coluzzii (Diptera: Culicidae): what implications for malaria vector control in Benin?

Author

Padonou, Germain Gil, primary, Zoungbédji, David Mahouton, additional, Sovi, Arthur, additional, Salako, Albert Sourou, additional, Konkon, Alphonse Keller, additional, Yovogan, Boulais, additional, Adoha, Constantin Jesukèdè, additional, Odjo, Esdras Mahoutin, additional, Osse, Razaki, additional, Sina, Haziz, additional, Govoétchan, Renaud, additional, Kpanou, Casimir Dossou, additional, Sagbohan, Hermann W, additional, Baba-Moussa, Lamine, additional, and Akogbéto, Martin, additional

Published
2023
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11. Evaluation of the efficacy of 2.15% imidacloprid (ROCO GEL) gel against Periplaneta americana under laboratory and field conditions in Benin

Author

Padonou, Gil G, primary, Kpanou, Casimir Dossou, additional, Osse, Razaki, additional, Salako, Albert, additional, Yovogan, Boulais, additional, Sagbohan, Hermann W, additional, Konkon, Alphonse, additional, Zoungbedji, David, additional, Akinro, Bruno, additional, Sina, Haziz, additional, Baba-Moussa, Lamine, additional, and Akogbéto, Martin, additional

Published
2023
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12. Assessing Insecticide Susceptibility and Resistance Intensity of Anopheles gambiae s.l. Populations From Some Districts of Benin Republic, West Africa

Author

Kpanou, Casimir Dossou, primary, Sagbohan, Hermann W, additional, Sovi, Arthur, additional, Osse, Razaki, additional, Padonou, Gil G, additional, Salako, Albert, additional, Tokponnon, Filémon, additional, Fassinou, Arsène Jacques, additional, Yovogan, Boulais, additional, Nwangwu, Udoka C, additional, Adoha, Constantin J, additional, Odjo, Esdras Mahoutin, additional, Ahogni, Idelphonse, additional, Sidick, Aboubakar, additional, Saïd Baba-Moussa, Lamine, additional, and Akogbéto, Martin, additional

Published
2022
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13. Intensity and different genes involved in the resistance of An. gambiae s.l. to pyrethroids in four districts representative of the different agricultural production zones of North Benin, West Africa

Author

Sagbohan, Hermann Watson, primary, Kpanou, Casimir D, additional, Padonou, Germain G, additional, Gandonou, Esaie, additional, Osse, Razaki, additional, Sovi, Arthur, additional, Sidick, Aboubakar, additional, Odjo, Aicha N, additional, Adoha, Constantin, additional, Yovogan, Boulais, additional, Salako, Albert S, additional, Ahogni, Idelphonse, additional, Fassinou, Arsène, additional, Sominanhouin, André, additional, Chitou, Saïd, additional, Agbangla, Clément, additional, and Akogbeto, Martin, additional

Published
2022
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14. Impact assessment of CDC bottles treated with a combination of insecticide and synergist on insecticide-resistant Anopheles gambiae populations in Benin

Author

Kpanou, Casimir Dossou, primary, Sagbohan, Hermann W, additional, Padonou, Gil G, additional, Osse, Razaki, additional, Sovi, Arthur, additional, Adoha, Constantin J, additional, Salako, Albert, additional, Agboho, Prudenciènne, additional, Fassinou, Arsène Jacques, additional, Yovogan, Boulais, additional, Ahogni, Idelphonse, additional, Akpodji, Serge, additional, Odjo, Esdras Mahoutin, additional, Affolabi, Zul-kifl, additional, Koukpo, Côme, additional, Baba-Moussa, Lamine Saïd, additional, and Akogbéto, Martin, additional

Published
2022
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15. Trophic preferences of Anopheles coluzzii(Diptera: Culicidae): what implications for malaria vector control in Benin?

Author

Padonou, Germain Gil, Zoungbédji, David Mahouton, Sovi, Arthur, Salako, Albert Sourou, Konkon, Alphonse Keller, Yovogan, Boulais, Adoha, Constantin Jesukèdè, Odjo, Esdras Mahoutin, Osse, Razaki, Sina, Haziz, Govoétchan, Renaud, Kpanou, Casimir Dossou, Sagbohan, Hermann W, Baba-Moussa, Lamine, and Akogbéto, Martin

Abstract

The main objective of the present study is to assess the preferences in terms of vertebrate hosts of Anopheles coluzzii, the main malaria vector in the pastoral area of Malanville, Benin, where rice cultivation and livestock are the main source of income for the populations. Adult mosquitoes were collected through pyrethrum spray catch, and human landing catch in two communes in Benin: Malanville, a pastoral area, and Porto-Novo, a nonpastoral area. Molecular species identification was performed through PCR within the Anopheles gambiaecomplex. Blood meal origin and P. falciparumsporozoite infection were determined using ELISA blood meal and circumsporozoite protein tests, respectively. Overall, 97% of females of An. gambiae s.l.were An. coluzzii, with biting behavior more pronounced outdoors in the pastoral area. In Malanville, the main vertebrate hosts on which females An. coluzziiblood fed were goats (44%), humans (24.29%), bovines (22%), and pigs (1.4%). Our results also showed that single-host blood meals (human: 24.29% or animal: 68%) were mostly observed compared to mixed blood meals (8.58%). The human biting rate (HBR) and P. falciparumsporozoite rate (SR) of An. coluzziiwere 66.25 bites/man/night and 0.77%, respectively. However, in the nonpastoral zone (Porto-novo), 93.98% of samples were An. coluzzii.The latter blood-fed mostly (86.84%) on humans, with an estimated HBR of 21.53 b/m/n and SR of 5.81%. The present study revealed an opportunistic and zoophagic behavior of An. coluzziiin the Malanville area with an overall low mean SR.

Published
2023
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16. Susceptibility of Anopheles gambiae sensu lato to different insecticide classes and mechanisms involved in the South-North transect of Benin

Author

Kpanou, Casimir Dossou, primary, Sagbohan, Hermann W, additional, Padonou, Germain G, additional, Ossè, Razaki, additional, Salako, Albert Sourou, additional, Fassinou, Arsène Jacques, additional, Sovi, Arthur, additional, Yovogan, Boulais, additional, Adoha, Constantin, additional, Sominahouin, André, additional, Ahogni, Idelphonse, additional, Chitou, Saïd, additional, Sidick, Aboubakar, additional, and Akogbéto, Martin, additional

Published
2021
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17. Influence of Climatic Factors on Aggression and Infectivity of Anopheles in the Districts the Indoor Residual Spray (IRS) in Northern Benin, West Africa

Author

Sominahouin, André, primary, Gil Padonou, Germain, additional, Landéhou, Rodrigue, additional, Sourou Salako, Albert, additional, Sagbohan, Hermann, additional, Ahogni, Idelphonse, additional, Lokonon, Sylvain, additional, Osse, Razaki, additional, Fassinou, Arsène, additional, Assogba, Bénoît, additional, Agossa, Fiacre, additional, Dagnon, Fortuné, additional, Houssou, Christophe, additional, and Akogbéto, Martin, additional

Published
2020
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18. Pyrethroid Resistance Intensity in Anopheles gambiae s.l. from Different Agricultural Production Zones in Benin, West Africa.

Author

Sagbohan, Hermann Watson, Kpanou, Casimir D., Sovi, Arthur, Osse, Razaki, Sidick, Aboubakar, Adoha, Constantin, Yovogan, Boulais, Salako, Albert S., Ahogni, Idelphonse, Fassinou, Arsène, Sominanhouin, André, Chitou, Saïd, Padonou, Germain G., Agbangla, Clément, and Akogbeto, Martin

Subjects
*INSECTICIDE resistance, *ANOPHELES gambiae, *PYRETHROIDS, *AGRICULTURAL productivity, *COTTON growing, *INSECTICIDE-treated mosquito nets
Abstract

Agricultural production activities usually occur in Benin with the use of a huge amount of insecticides including pyrethroids for pest control. It is therefore important to regularly monitor pyrethroid resistance intensity in Anopheles gambiae s.l., the main malaria vector. This study was conducted in cereal, cotton, rice growing, and urban market gardening areas throughout the country in 2018 and 2019. Females An. gambiae s.l. field-collected as larvae were exposed to deltamethrin 1 × (0.05%), 2 × (0.1%), 5 × (0.25%), and 10 × (0.5%) and permethrin 1 × (0.75%), 2 × (1.5%), 5 × (3.75%), and 10 × (7.5%). Synergist assays were also performed using World Health Organization articles combining piperonyl butoxide (PBO) (4%) + deltamethrin 1 × and, PBO (4%) + Permethrin 1 × . Molecular species and L1014F kdr mutation were identified using PCR. Expression of metabolic enzymes was also assessed through biochemical tests. After exposure to permethrin and deltamethrin 10 × , An. gambiae s.l. displayed mortality rates <98%. Synergist assays induced significantly higher mortality rates than pyrethroids alone (p < 0.05). An. gambiae s.l. complex was composed of An. gambiae s.s., Anopheles coluzzii, and Anopheles arabiensis, with mean frequency of the L1014F kdr mutation >75%. Overexpression of nonspecific α and β esterases was observed in the cereal, cotton, and urban market gardening areas, while an overexpression of mixed function oxidases was observed in the cotton and rice growing areas. Overall, An. gambiae s.l. showed high resistance intensity to both deltamethrin and permethrin. The synergist and biochemical tests performed suggest that PBO long-lasting insecticidal nets may provide a greater control of pyrethroid-resistant mosquitoes. [ABSTRACT FROM AUTHOR]

Published
2022
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19. Assessing Insecticide Susceptibility and Resistance Intensity of Anopheles gambiaes.l. Populations From Some Districts of Benin Republic, West Africa

Author

Kpanou, Casimir Dossou, Sagbohan, Hermann W, Sovi, Arthur, Osse, Razaki, Padonou, Gil G, Salako, Albert, Tokponnon, Filémon, Fassinou, Arsène Jacques, Yovogan, Boulais, Nwangwu, Udoka C, Adoha, Constantin J, Odjo, Esdras Mahoutin, Ahogni, Idelphonse, Sidick, Aboubakar, Saïd Baba-Moussa, Lamine, and Akogbéto, Martin

Abstract

Pyrethroid resistance is widespread in sub-Saharan Africa. The objective of this study was to assess the insecticide resistance intensity in Anopheles gambiaes.l. (Diptera: Culicidae) in four districts of Benin in order to better understand how pyrethroid-only nets are likely to be effective. Thus, adult females of An. gambiaes.l., reared from field-collected larvae were used for assessing resistance intensity to permethrin and deltamethrin. They were tested at 1×, 5×, and 10× the diagnostic dose, using both WHO susceptibility tube testing and CDC bottle bioassays. Identification of molecular species, as well as of L1014F Kdrand Ace-1Rmutations was performed using the PCR. The level of expression of biochemical enzymes was also evaluated. Overall, moderate to high resistance intensity to permethrin and deltamethrin was observed, irrespective of the testing method. While the L1014F Kdrfrequency was high (>75%), Ace-1Rwas low (≤6%) in An. gambiaes.s. and Anopheles coluzzii, the two predominant species [52% (95% CI: 44.8–59.1) and 45% (95% CI: 38.0–52.2), respectively]. Anopheles arabiensiswas found at very low frequency (3%, 95%CI: 1.1–6.4). For Biochemical analyses, α and β-esterases were over-expressed in all four districts, while mixed-function oxidases (MFOs) were over-expressed in only one. Overall, the two testing methods led to comparable conclusions, though there were a few inconsistencies between them. The moderate-high resistance intensity observed in the study area suggests that dual active-ingredient (AI) long-lasting insecticidal nets (LLINs) may provide better control of insecticide-resistant mosquitoes.

Published
2022
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20. Influence of climatic factors on aggression and infectivity of Anopheles in the districts the Indoor Residual Spray (IRS) in Northern Benin, West Africa.

Author

SOMINAHOUIN, André, primary, Padonou, Germain Gil, additional, Landéhou, Rodrigue, additional, Salako, Albert Sourou, additional, Sagbohan, Hermann, additional, Ahogni, Idelphonse, additional, Lokonon, Sylvain, additional, Osse, Razaki, additional, Assogba, Bénoît, additional, Agossa, Fiacre, additional, Dagnon, Fortuné, additional, Houssou, Christophe, additional, and Akogbéto, Martin C., additional

Published
2019
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21. Population Dynamics of Anopheles gambiae s.l. and Culex quinquefasciatus in Rural and Urban Settings Before an Indoor Residual Spraying Campaign in Northern Benin

Author

Salako, Albert Sourou, primary, Ossè, Razaki, additional, Padonou, Gil G., additional, Dagnon, Fortuné, additional, Aïkpon, Rock, additional, Kpanou, Casimir, additional, Sagbohan, Hermann, additional, Sovi, Arthur, additional, Sèzonlin, Michel, additional, and Akogbeto, Martin C., additional

Published
2019
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22. Population Dynamics of Anopheles gambiae s.l. and Culex quinquefasciatus in Rural and Urban Settings Before an Indoor Residual Spraying Campaign in Northern Benin.

Author

Salako AS, Ossè R, Padonou GG, Dagnon F, Aïkpon R, Kpanou C, Sagbohan H, Sovi A, Sèzonlin M, and Akogbeto MC

Subjects
Animals, Benin, Housing, Humans, Insecticides administration & dosage, Mosquito Control, Mosquito Vectors, Population Dynamics, Animal Distribution, Anopheles physiology, Culex physiology, Insecticides pharmacology, Pyrethrins administration & dosage
Abstract

Background: The purpose of this report is to provide information on Culicidae diversity; biting behavior and spatio-seasonal variation of abundance of Anopheles gambiae s.l. and Culex quinquefasciatus in rural and urban settings of the Alibori and Donga regions, Northern Benin, where an indoor residual spraying (IRS) campaign to control malaria is planned. Methods: Both human landing catches, associated with pyrethrum spray catches were used to monitor the mosquito populations in 12 sites with 1 urban and 1 rural located in each of the 6 districts randomly selected in the two targeted regions. After morphological identification of all mosquito specimens, biting behavior and density of An. gambiae s.l. and Cx quinquefasciatus were studied. PCR was also performed on An. gambiae s.l., to identify sibling species and its seasonal variation. Results: A total of 10,367 mosquitoes were captured, related to 14 species of the genera, Anopheles , Aedes , Culex and Mansonia . Of the total species collection, 40.39% were An. gambiae s.l. and 56.85% were Cx. quinquefasciatus. An. gambiae s.l. was more abundant in Donga (2521 specimens) compared with Alibori (1666 specimens). The opposite trend was observed with Cx. quinquefasciatus (2162 specimens in Donga against 4028 in Alibori). An. gambiae s.l. was predominant and displayed a higher blood feeding rate in rural areas, whereas Cx. quinquefasciatus was in majority in urban areas. An. gambiae s.l. was more endophagic, whereas Cx. quinquefasciatus showed similar indoor and outdoor biting behavior. An. gambiae s.l. was composed of An. coluzzii found in majority in the drought, and An. gambiae , which was predominant in the rainy season. Conclusion: The predominance of the malaria vector, An. gambiae s.l. and their higher blood feeding rate and their significantly high endophagy in rural areas indicate that these areas should be primarily targeted with the IRS operations to have a substantial impact on malaria transmission. Endophagy, characteristic of An. gambiae s.l. in our study area, suggests that IRS will have a positive impact on vector control if implemented 1 week before June that is the onset of the rainy season.

Published
2019
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