Mosquito vector diversity and abundance in southern Botswana, in a global context of emerging pathogen transmission
Accepted: 15 April 2022
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Background. The continued spread of infectious diseases by mosquitoes remains a formidable obstacle to the well-being of the people all over the world. Arboviruses are spread from one vertebrate host to another by vectors through intricate transmission cycles that involve the virus, the vertebrate host, and the vector. It is essential to acquire a better understanding of the current abundance and distribution of major vectors in order to adequately prepare for the possibility of arbovirus outbreaks. This is because the abundance and distribution of these major vectors determines the human populations that are at risk for the diseases that they transmit. The effects of climate change on the amount of mosquitoes and their ability to survive the seasons have had a substantial impact on the spread of diseases that are transmitted by vectors in many different parts of Botswana.
Methods. The purpose was to collect mosquito samples in Gaborone and the neighboring areas in southern Botswana, including border stations. We collected different stages of the mosquito from each place, raised them to maturity, and then identified them. Both morphological and genetic studies were utilized in order to successfully identify the organism. The species of Culex mosquitoes accounted for 88.3% of the 5177 mosquitoes that were collected and identified, whereas the species of Aedes aegypti and Anopheles mosquitoes accounted for 11.5% and 0.2% respectively.
Conclusions. These findings give entomological baseline data that will aid in the study of vectorial patterns and the estimation of future arboviral hazards provided by mosquitoes. Additionally, these findings document the diversity and abundance of mosquito species.
Lee H, Halverson S, Ezinwa, N. Mosquito-Borne Diseases. Primary Care-Clinics in Office Practice 2018; 45(3), 393–407. https://doi.org/10.1016/j.pop.2018.05.001 DOI: https://doi.org/10.1016/j.pop.2018.05.001
Tolle MA, Mosquito-borne Diseases. Current Problems in Paediatric and Adolescent Health
Hill SC, Vasconcelos J, Neto Z, et al. Emergence of the Asian lineage of Zika virus in Angola: an outbreak investigation. The Lancet Infectious Diseases 2019; 19 1138–1147. https://doi.org/10.1016/S1473-3099(19)30293-2 DOI: https://doi.org/10.1016/S1473-3099(19)30293-2
Vorou R. Zika virus, vectors, reservoirs, amplifying hosts, and their potential to spread worldwide: What we know and what we should investigate urgently. International Journal of Infectious Diseases 2016; 48, 85–90. https://doi.org/10.1016/j.ijid.2016.05.014 DOI: https://doi.org/10.1016/j.ijid.2016.05.014
Chirebvu E. Chimbari MJ. Characteristics of Anopheles arabiensis larval habitats in Tubu village, Botswana Journal of Vector Ecology 2014; 40(1), 129–138. DOI: https://doi.org/10.1111/jvec.12141
Pachka H, Annelise T, Alan K et al. Rift Valley fever vector diversity and impact of meteorological and environmental factors on Culex pipiens dynamics in the Okavango Delta, Botswana. Parasites & Vectors 2016; 9:434. https://doi.org/10.1186/s13071-016-1712-1 DOI: https://doi.org/10.1186/s13071-016-1712-1
Tawe L, Ramatlho P, Waniwa K. et al. Preliminary survey on Anopheles species distribution in Botswana shows the presence of Anopheles gambiae and Anopheles funestus complexes. Malaria Journal 2017; 16:106. https://doi.org/10.1186/s12936-017-1756-5 DOI: https://doi.org/10.1186/s12936-017-1756-5
Bango ZA, Tawe L, Waithaka C, Paganotti GM. Past and current biological factors affecting malaria in the low transmission setting of Botswana : A review. Infection, Genetics and Evolution 2020; 85:104458. DOI: https://doi.org/10.1016/j.meegid.2020.104458
Simon C, Moakofhi K, Mosweunyane T. et al. Malaria control in Botswana, 2008-2012: the path towards elimination. Malaria Journal 2013; 12:458. DOI: https://doi.org/10.1186/1475-2875-12-458
Kgoroebutswe TK, Ramatlho P, Reeder S. et al. Distribution of Anopheles mosquito species, their vectoral role and profiling of knock-down resistance mutations in Botswana. Parasitology Research 2020; 119, 1201–1208. https://doi.org/10.1007/s00436-020-06614-6 DOI: https://doi.org/10.1007/s00436-020-06614-6
Rueda LM, Pictorial keys for the identification of mosquitoes (Diptera: Culicidae) associated with Dengue Virus Transmission 2004 Auckland, New Zealand: Mongolia Press. DOI: https://doi.org/10.11646/zootaxa.589.1.1
Scott JA, Collins FH & Brogdon WG. Identification of Single Specimens of the Anopheles gambiae Complex by the Polymerase Chain Reaction. The American Journal of Tropical Medicine and Hygiene 1993; 49(4), 520–529. DOI: https://doi.org/10.4269/ajtmh.1993.49.520
Cornel AJ, Lee Y, Paulo A, et al. Mosquito community composition in South Africa and some neighbouring countries. Parasites & Vectors 2018; 11:331. DOI: https://doi.org/10.1186/s13071-018-2824-6
Jupp P. Mosquitoes of Southern Africa: Culicinae and Toxorhynchitinae. Hartebeespoort: Ekogilde Publishers 1996.
Braack L, Gouveia De Almeida AP, Cornel AJ. et al. Mosquito-borne arboviruses of African origin: Review of key viruses and vectors. Parasites and Vectors 2018; 11:29. https://doi.org/10.1186/s13071-017-2559-9 DOI: https://doi.org/10.1186/s13071-017-2559-9
Chouin-Carneiro T, Vega-Rua A, Vazeille M. et al. Differential Susceptibilities of Aedes aegypti and Aedes albopictus from the Americas to Zika Virus. PLoS Neglected Tropical Diseases 2016; 10(3), e0004543. https://doi.org/10.1371/journal.pntd.0004543 DOI: https://doi.org/10.1371/journal.pntd.0004543
Weetman D, Kamgang B, Badolo A et al. Aedes mosquitoes and Aedes-borne arboviruses in Africa: Current and future threats. International Journal of Environmental Research and Public Health 2018; 15(2), 220. https://doi.org/10.3390/ijerph15020220 DOI: https://doi.org/10.3390/ijerph15020220
Mweya CN, Kimera SI, Stanley G. et al. Climate change influences potential distribution of infected Aedes aegypti co-occurrence with dengue epidemics risk areas in Tanzania. PLoS ONE 2016; 11(9), https://doi.org/10.1371/journal.pone.0162649 DOI: https://doi.org/10.1371/journal.pone.0162649
Yalwala S, Clark J, Oullo D. et al. Comparative efficacy of existing surveillance tools for Aedes aegypti in Western Kenya. Journal of Vector Ecology 2015; 40(2), 301–307. https://doi.org/10.1111/jvec.12168 DOI: https://doi.org/10.1111/jvec.12168
Mier-y-Teran-Romero L, Tatem AJ, Johansson MA. Mosquitoes on a plane: Disinfection will not stop the spread of vector-borne pathogens, a simulation study. PLoS Neglected Tropical Diseases 2017; 11(7), e0005683. https://doi.org/10.1371/journal.pntd.0005683 DOI: https://doi.org/10.1371/journal.pntd.0005683
Buxton M, Lebani K, Nyamukondiwa C, Wasserman RJ. First record of Aedes (Stegomyia) aegypti (Linnaeus, 1762) (Diptera: Culicidae) in Botswana. BioInvasions Records 2019; 8(3), 551–557. https://doi.org/10.3391/bir.2019.8.3.10 DOI: https://doi.org/10.3391/bir.2019.8.3.10
Freedman O. The yellow fever situation in the Bechuanaland protectorate. In World Health Organization 1954; Geneva, Switzerland.
Muspratt J. The Stegomyia mosquitoes of South Africa and some neighbouring territories. Memoirs of the Entomological Society of Southern Africa 1956; 4, 1–138.
Murrell EG, Damal K, Lounibos LP, Juliano SA. Distributions of competing container mosquitoes depend on detritus types, nutrient ratios, and food availability. Annals of the Entomological Society of America 2011; 104(4), 688–698. https://doi.org/10.1603/AN10158 DOI: https://doi.org/10.1603/AN10158
Juliano SA, O’Meara GF, Morrill JR & Cutwa MM. Desiccation and thermal tolerance of eggs and the coexistence of competing mosquitoes. Oecologia 2002; 130(3), 458–469. https://doi.org/10.1007/s004420100811 DOI: https://doi.org/10.1007/s004420100811
BOPA. Ministry cautions public on malaria outbreak. Retrieved from Daily News website: http://www.dailynews.gov.bw/mobile/news-details.php?nid=42092&flag 2018.
Kline DL. Traps and trapping techniques for adult mosquito control. Journal of the American Mosquito Control Association 2006; 22(3), 490–496. https://doi.org/10.2987/8756-971X(2006)22[490:TATTFA]2.0.CO;22125 DOI: https://doi.org/10.2987/8756-971X(2006)22[490:TATTFA]2.0.CO;2
Silver JB. Mosquito Ecology: Field Sampling Methods. Retrieved from https://books.google.co.bw/books?id=VM8MA4E_VT8C 2008.
Copyright (c) 2022 Ntebaleng Makate, Pleasure Ramatlho, Tefo Kesaobaka Kgoroebutswe, Katherine Laycock, Giacomo Maria Paganotti
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