Spatial and temporal distribution of the malaria mosquito Anopheles arabiensis in northern Sudan: influence of environmental factors and implications for vector control

Ageep, Tellal B; Cox, Jonathan; Hassan, Mohammed Mahgoub; Knols, Bart G. J.; Benedict, Mark Q.; Malcolm, C. A.; Babiker, Ahmed; Sayed, Badria B El

doi:10.1186/1475-2875-8-123

Cited by 74 publications

(67 citation statements)

References 11 publications

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“…Turbulent water does not favour larvae development, which has already been observed in previous studies (e.g. Ageep et al, 2009), while Dejenie et al (2011) remark that it is very likely that peripheral water bodies from irrigation channels and small depressions like cattle hoof prints, rather than the larger main dams, become preferred sites for mosquito larvae. Hence, it is very likely that locations characterized by cattle and proximity to water bodies are at risk due to the probable presence of vector breeding sites.…”

Section: Discussionsupporting

confidence: 59%

Assessing the relationship between environmental factors and malaria vector breeding sites in Swaziland using multi-scale remotely sensed data

2015

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Many entomological studies have analyzed remotely sensed data to assess the relationship between malaria vector distribution and the associated environmental factors. However, the high cost of remotely sensed products with high spatial resolution has often resulted in analyses being conducted at coarse scales using open-source, archived remotely sensed data. In the present study, spatial prediction of potential breeding sites based on multi-scale remotely sensed information in conjunction with entomological data with special reference to presence or absence of larvae was realized. Selected water bodies were tested for mosquito larvae using the larva scooping method, and the results were compared with data on land cover, rainfall, land surface temperature (LST) and altitude presented with high spatial resolution. To assess which environmental factors best predict larval presence or absence, Decision Tree methodology and logistic regression techniques were applied. Both approaches showed that some environmental predictors can reliably distinguish between the two alternatives (existence and non-existence of larvae). For example, the results suggest that larvae are mainly present in very small water pools related to human activities, such as subsistence farming that were also found to be the major determinant for vector breeding. Rainfall, LST and altitude, on the other hand, were less useful as a basis for mapping the distribution of breeding sites. In conclusion, we found that models linking presence of larvae with high-resolution land use have good predictive ability of identifying potential breeding sites.

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Section: Discussionsupporting

confidence: 59%

Assessing the relationship between environmental factors and malaria vector breeding sites in Swaziland using multi-scale remotely sensed data

2015

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“…These technologies will help elucidate the effects of habitat loss on immune health, and also allow the detection of undescribed pathogens. Second, remote sensing is providing predictive models regarding the spread of important pathogens of humans (Ageep et al, 2009;Brooker, 2007;Hay and Lennon, 1999;Kalluri et al, 2007), and can also be used to model EIDs in birds. Third, computer and mathematical modeling of deforestation will allow theoretical studies where empirical studies on deforestation prove unfeasible or unethical (Manson and Evans, 2007).…”

Section: Deforestation and Avian Diseasementioning

confidence: 99%

Deforestation and avian infectious diseases

Sehgal

2010

Journal of Experimental Biology

112

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SummaryIn this time of unprecedented global change, infectious diseases will impact humans and wildlife in novel and unknown ways. Climate change, the introduction of invasive species, urbanization, agricultural practices and the loss of biodiversity have all been implicated in increasing the spread of infectious pathogens. In many regards, deforestation supersedes these other global events in terms of its immediate potential global effects in both tropical and temperate regions. The effects of deforestation on the spread of pathogens in birds are largely unknown. Birds harbor many of the same types of pathogens as humans and in addition can spread infectious agents to humans and other wildlife. It is thought that avifauna have gone extinct due to infectious diseases and many are presently threatened, especially endemic island birds. It is clear that habitat degradation can pose a direct threat to many bird species but it is uncertain how these alterations will affect disease transmission and susceptibility to disease. The migration and dispersal of birds can also change with habitat degradation, and thus expose populations to novel pathogens. Some recent work has shown that the results of landscape transformation can have confounding effects on avian malaria, other haemosporidian parasites and viruses. Now with advances in many technologies, including mathematical and computer modeling, genomics and satellite tracking, scientists have tools to further research the disease ecology of deforestation. This research will be imperative to help predict and prevent outbreaks that could affect avifauna, humans and other wildlife worldwide.Key words: deforestation, birds, infectious diseases, disease ecology, global change. THE JOURNAL OF EXPERIMENTAL BIOLOGY956 Brownstein et al., 2005; Killilea et al., 2008), and cutaneous leishmaniasis is increasing with deforestation in Costa Rica (Chaves et al., 2008). Deforestation has also been associated with the increased emergence of viral pathogens, such as SARS, Ebola and other viruses of bats (Field, 2009; Leroy et al., 2005; Looi and Chua, 2007). In addition, deforestation can indirectly result in increased human contact with wildlife, increasing the exposure to zoonoses (Wolfe et al., 2005;Wolfe et al., 2007). For example, it is now clear that human/chimpanzee contacts led to the HIV pandemic (Keele et al., 2006; Keele et al., 2009), and may have provided the first transmission of Falciparum malaria (Rich et al., 2009).Birds are affected by viral, bacterial, parasitic and fungal infectious pathogens, and can also act as reservoirs of numerous zoonotic pathogens (Davis, 1971;Hubalek, 2004;Thomas and Hunter, 2007). It is likely that the direct and indirect effects of deforestation could affect the transmission of all the four major classes of avian pathogens. Viruses Avian influenzaThe most topical virus of birds is the highly pathogenic avian influenza H5N1. Avian influenza viruses reside in wild aquatic birds; they are the natural reservoir for all influenza A viruses (Ol...

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“…Es claro que los jagüeyes constituyen los criaderos más aptos para la especie, con nutrientes esenciales derivados de las aguas de escorrentía, exposición al sol que asegura la conversión de ácidos grasos esenciales para las formas inmaduras (30) y espejos de agua que cubren entre 4.000 y 24.000 m 2 , lo cual permite el crecimiento de vegetación que sirve de refugio de las larvas frente a los depredadores (8,31,32).…”

Section: Discussionunclassified

Bionomics of Anopheles (Nyssorhynchus) albimanus (Diptera: Culicidae) in two villages of the Wayúu people, Riohacha, La Guajira, Colombia

et al. 2017

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Introducción. Riohacha, capital del departamento de La Guajira, registra las tasas más altas de malaria o paludismo en el departamento, especialmente entre los indígenas de la etnia wayúu.Objetivo. Describir algunos aspectos de la bionomía de las especies del género Anopheles presentes en dos rancherías de la etnia wayúu.Materiales y métodos. Se hicieron dos muestreos durante las temporadas de lluvia y sequía en las rancherías Marbacella y El Horno (municipio de Riohacha, La Guajira). Se recolectaron formas inmaduras de los mosquitos y se describieron sus hábitats. Los mosquitos adultos se recolectaron al posarse en sujetos humanos, previo consentimiento informado, y con trampas de luz Shannon y CDC.Resultados. Todos los ejemplares recolectados eran Anopheles albimanus, especie que registró actividad de picadura durante toda la noche en el peridomicilio (n=7), en tanto que en el intradomicilio se capturaron solo dos mosquitos entre las 18:00 y las 20:00 horas. Los sitios de cría positivos correspondieron a jagüeyes (n=7; 38,8 %), charcos (n=2; 10,5 %), y estanques piscícolas (n=2; 10,5 %). La mayor abundancia de formas inmaduras se encontró en los jagüeyes (n=25; 78 %), cuyo pH oscilaba entre 7,20 y 7,81 a una temperatura de 26,5 °C, y se localizaban a 150 m de distancia de las viviendas.Conclusión. Anopheles albimanus se registró en todos los depósitos de agua de ambas rancherías. Dado que la especie se considera vector primario de la malaria en la zona, debe establecerse un sistema de vigilancia entomológica local que involucre a la comunidad a la vez que respete su cosmología y actividades rutinarias como la pesca.

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Spatial and temporal distribution of the malaria mosquito Anopheles arabiensis in northern Sudan: influence of environmental factors and implications for vector control

Cited by 74 publications

References 11 publications

Assessing the relationship between environmental factors and malaria vector breeding sites in Swaziland using multi-scale remotely sensed data

Assessing the relationship between environmental factors and malaria vector breeding sites in Swaziland using multi-scale remotely sensed data

Deforestation and avian infectious diseases

Bionomics of Anopheles (Nyssorhynchus) albimanus (Diptera: Culicidae) in two villages of the Wayúu people, Riohacha, La Guajira, Colombia

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