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111 results for “Aedes albopictus”
Aedes albopictus in Zambia
<p>Identifying the current geographic range of disease vectors is a critical first step towards determining effective mechanisms for controlling and potentially eradicating them. This is particularly true given that historical vector ranges may expand due to changing climates and human activity. The <em>Aedes </em>subgenus <em>Stegomyia</em> contains over 100 species, and among them, <em>Ae.</em> <em>aegypti</em> and <em>Ae. albopictus</em> mosquitoes represent the largest concern for public health, spreading dengue, chikungunya, and Zika viruses. While <em>Ae. aegypti</em> has been observed in the country of Zambia for decades, <em>Ae. albopictus</em> has not. In 2015 we sampled four urban and three rural areas in Zambia for <em>Aedes</em> species. Using DNA barcoding, we confirmed the presence of immature and adult <em>Ae. albopictus</em> at two sites: Siavonga and Livingstone. These genotypes seem most closely related to specimens previously collected in Mozambique based on CO1 sequence from mtDNA. We resampled Siavonga and Livingstone sites in 2019, again observing immature and adult <em>Ae. albopictus</em> at both sites. Relative <em>Ae. albopictus</em> frequencies were similar between sites, with the exception of immature life stages, which were higher in Siavonga than in Livingstone in 2019. While <em>Ae. albopictus</em> frequencies did not vary through time in Livingstone, both immature and adult frequencies increased through time in Siavonga. This report serves to document the presence of <em>Ae. albopictus</em> in Zambia, which will contribute to the process of determining the potential public health implications of this disease vector in Central Africa.</p>
The spread of Aedes albopictus (Diptera: Culicidae) in the islands of São Tome and Príncipe
<p>The mosquito <em>Aedes albopictus</em> (Diptera: Culicidae) is a vector species of the causal agents of Dengue, yellow fever, and Zika among other diseases pathogens. The species originated in Southeast Asia and has spread widely and rapidly in the last century. The species has been reported in localities from the Gulf of Guinea since the early 2000s, but systematic sampling has been scant. We sampled <em>Ae. albopictus</em> twice, in 2013 and 2023 across the altitudinal gradient in São Tomé and found that the species was present in all sampled years at altitudes up to 680 meters. We also found some evidence of increases in proportional representation compared to <em>Ae. aegypti</em> over time. We report the presence of the species in Príncipe for the first time, suggesting that the range of <em>Ae. albopictus</em> is larger than previously thought. Finally, we use bioclimatic niche modeling to infer the potential range of <em>Ae. albopictus</em> and infer that the species has the potential to spread across a large portion of São Tomé and Príncipe. Our results suggest that <em>Ae. albopictus</em> has established itself as a resident species of the islands of the Gulf of Guinea and should be incorporated into the list of potential vectors that need to be surveyed and controlled.</p>
Fig. 1 in Primeras capturas de Aedes albopictus (Skuse, 1894) (Diptera: Culicidae) en el Área Metropolitana de Valencia.
Fig. 1.- Mapas detallados de los municipios con casos confirmados de presencia de Ae. albopictus, situación del término municipal de Picanya dentro del Área Metropolitana de Valencia y punto exacto de detección de poblaciones establecidas del mosquito tigre en Picanya.
Fig. 1 in A comparative analysis of resistance testing methods in Aedes albopictus (Diptera: Culicidae) from St. Johns County, Florida
Fig. 1. Collection site locations in St. Johns County, Florida, for the 3 Aedes albopictus field strains tested for resistance in this study. RAYS is 14.7 km from ELKTON. RAYS is 6.6 km from BEACH. ELKTON and BEACH are 18.0 km apart. ELKTON and RAYS were the F1 and F2 sites in Marcombe et al. (2014).
Fig. 2 in Neotype Designation for Aedes (Stegomyia) albopictus (Skuse)
Fig. 2, Aedes (Stegomyia) albopictus (Skuse). A, B, dorsoventral aspects of the neotype male pupa; C, tergal aspect of the neotype male terminalia.
Figura 8 in Aedes albopictus (Skuse, 1894) (Diptera: Culicidae): nuevos registros para Colombia
Figura 8. Municipios de Antioquia con reportes de Aedes albopictus. /Municipalities of Antioquia with reports of Aedes albopictus.
Figura 7 in Aedes albopictus (Skuse, 1894) (Diptera: Culicidae): nuevos registros para Colombia
Figura 7. Índice de infestación especifico por tipo de depósito en larvas de Aedes albopictus en los municipios del estudio en el departamento de Antioquia, Colombia. / Specific infestation index by type of breeding site in Aedes albopictus larvae in the study municipalities in the department of
Figura 4 in Aedes albopictus (Skuse, 1894) (Diptera: Culicidae): nuevos registros para Colombia
Figura 4. Distribución del número de mosquitos (hembras, machos y larvas) de Aedes albopictus colectados en los municipios del estudio en el departamento de Antioquia, Colombia. / Distribution of the number of Aedes albopictus mosquitoes (females, males and larvae) collected in the study municipalities in the department of Antioquia, Colombia.
Figura 3 in Aedes albopictus (Skuse, 1894) (Diptera: Culicidae): nuevos registros para Colombia
Figura 3. Caracteres diagnósticos observados para identificar larvas y adultos de Aedes albopictus. A. Vista de la larva. B. Dientes del peine organizados en una fila. C. Cepillo ventral (4-X) con 4 pares de setas. D. Dientes del peine en forma de espina recta sin espinas subapicales. E. Vista lateral del adulto. F. Escutelo con una estrecha franja blanca longitudinal mediana y clÍpeo sin escamas blancas. G. Mesepimeron con manchas de escamas blancas no separadas formando una mancha blanca en forma de V. / Diagnostic characters observed to identify larvae and adults of Aedes albopictus. A. View of the larva. B. Comb teeth arranged in a row. C. Ventral brush (4-X) with 4 pairs of setae. D. Straight spine-shaped comb teeth without subapical spines E. Lateral view of the adult. F. Scutellum with a narrow median longitudinal white stripe and clypeus without white scales. G. Mesepimeron with white scale patches not separated forming a V-shaped white patch.
Figura 2 in Aedes albopictus (Skuse, 1894) (Diptera: Culicidae): nuevos registros para Colombia
Figura 2. Tipos de criaderos de inspeccionados durante la búsqueda de larvas Aedes albopictus en los municipios del estudio en el departamento de Antioquia, Colombia. A. Llantas. B. Canecas. C. Tanques bajos. D. Botellas. E. Inservibles no reutilizables de plástico. F. Tocones de bambú. / Types of breeding sites inspected during the search for Aedes albopictus larvae in the study municipalities in the department of Antioquia, Colombia. A. Tires. B. Water storage barrels. C. Low tanks. D. Bottles. E. Discarded non-reusable plastic. F. Bamboo stumps.
Figura 1 in Aedes albopictus (Skuse, 1894) (Diptera: Culicidae): nuevos registros para Colombia
Figura 1. Zona de estudio.A. Veredas del estudio en la zona de influencia de las centrales hidroeléctricas Porce II y Porce II. B. Ubicación de los municipios de Amalfi, AnorÍ, Gómez Plata, Guadalupe y Tarazá, y de los embalses Porce II y Porce III en el departamento de Antioquia. C. Localización del departamento de Antioquia en Colombia. D. Ubicación de Colombia en Sur América. / Study area. A. Study hamlets in the area of influence of the Porce II and Porce II hydroelectric power stations. B. Localization of the municipalities of Amalfi, AnorÍ, Gómez Plata, Guadalupe and Tarazá, and the Porce II and Porce III dams in the department of Antioquia. C. Localization of the department of Antioquia in Colombia. D. Localization of Colombia in South America.
Figura 6 in Aedes albopictus (Skuse, 1894) (Diptera: Culicidae): nuevos registros para Colombia
Figura 6. Número de larvas de Aedes albopictus por tipo de sitio de crÍa colectadas en los municipios del estudio en el departamento de Antioquia, Colombia. / Number of Aedes albopictus larvae by type of breeding site collected in the study municipalities in the department of Antioquia, Colombia.
Fig. 2 in Oviposition of Aedes aegypti Linnaeus, 1762 and Aedes albopictus Skuse, 1894 (Diptera: Culicidae) under laboratory and field conditions using ovitraps associated to different control agents, Manaus, Amazonas, Brazil
Fig. 2. Total Aedes aegypti and Aedes albopictus adults obtained through egg collection in ovitraps containing grass infusion (control) and associated with different control agents. Legend: *(gI + Bti) – grass infusion + Bacillus thuringiensis israelensis; *(gI + Ss) – grass infusion + Saccharopolyspora spinosa; *(dW + Th) – distilled water + Toxorhynchites haemorrhoidalis; *(gI + P) – grass infusion + Pyriproxyfen;* (gI) – grass infusion (control).
Fig. 1 in Oviposition of Aedes aegypti Linnaeus, 1762 and Aedes albopictus Skuse, 1894 (Diptera: Culicidae) under laboratory and field conditions using ovitraps associated to different control agents, Manaus, Amazonas, Brazil
Fig. 1. Ovitraps Positivity Index (OPI) and Egg Density Index (EDI) with association of grass infusion with different control agents using ovitraps in the period ranging from June to July 2015, Manaus – Amazonas – Brazil. Legend: *(gI + Bti) – grass infusion + Bacillus thuringiensis israelensis; * (gI + Ss) – grass infusion + Saccharopolyspora spinosa; * (dW + Th) – distilled water + Toxorhynchites haemorrhoidalis; *(gI + P) – grass infusion + Pyriproxyfen; * (gI) – grass infusion (control).
Figure 5 in First report on mild insecticide resistance in newly established Aegean Aedes albopictus populations of Turkey
Figure 5. Mortality rates against fenitrothion in Aedes albopictus populations of the Aegean region (Mean ± S.E. Same lower case letters above error bars indicates nonsignificant difference at p> 0.05 based on the ANOVA results followed by Tukey's HSD test).
Figure 6 in First report on mild insecticide resistance in newly established Aegean Aedes albopictus populations of Turkey
Figure 6. Mortality rates against permethrin in Aedes albopictus populations of the Aegean region (Mean ± S.E. Same lower case letters above error bars indicates nonsignificant difference at p> 0.05 based on the ANOVA results followed by Tukey's HSD test).
Figure 4 in First report on mild insecticide resistance in newly established Aegean Aedes albopictus populations of Turkey
Figure 4. Mortality rates against bendiocarb in Aedes albopictus populations of the Aegean region (Mean ± S.E. Same lower case letters above error bars indicates nonsignificant difference at p> 0.05 based on the ANOVA results followed by Tukey's HSD test).
Figure 3 in First report on mild insecticide resistance in newly established Aegean Aedes albopictus populations of Turkey
Figure 3. Mortality rates against propoxur in Aedes albopictus populations of the Aegean region (Mean ± S.E. Same lower case letters above error bars indicates nonsignificant difference at p> 0.05 based on the ANOVA results followed by Tukey's HSD test).
Figure 2 in First report on mild insecticide resistance in newly established Aegean Aedes albopictus populations of Turkey
Figure 2. Mortality rates against DDT in Aedes albopictus populations of the Aegean region (Mean ± S.E. Same lower case letters above error bars indicates nonsignificant difference at p> 0.05 based on the ANOVA results followed by Tukey's HSD test).
Fig. 1 in Susceptibility status to temephos in larval Aedes aegypti and Aedes albopictus (Diptera: Culicidae) populations from Quintana Roo, southeastern Mexico
Fig. 1. Susceptibility status to temephos (1× the discriminant dose) of Aedes albopictus (grey pie charts) and Aedes aegypti (black and white pie charts) larvae from 4 communities of Quintana Roo, Mexico.
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