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13 results for “Anopheles coluzzii”
Spatial and temporal characteristics of laboratory-induced Anopheles coluzzii swarms: shape, structure and flight kinematics
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Data from: Tracing the origin of the early wet-season Anopheles coluzzii in the Sahel
In arid environments the source of the malaria mosquito populations that re-establish soon after first rains remains a puzzle and alternative explanations have been proposed. Using genetic data, we evaluated whether the early Rainy Season (RS) population of Anopheles coluzzii is descended from the preceding late-RS generation at the same locality, consistent with dry season (DS) dormancy (aestivation), or from migrants from distant locations. Distinct predictions derived from these two hypotheses were assessed, based on variation in 738 SNPs in eleven A. coluzzii samples, including seven samples spanning two years in a Sahelian village. As predicted by the 'local origin under aestivation hypothesis', temporal samples from the late RS and those collected after the first rain of the following RS were clustered together, whilst larger genetic distances were found among samples spanning the RS. Likewise, multi-locus genotype composition of samples from the end of the RS were similar across samples until the following RS, unlike samples that spanned the RS. Consistent with reproductive arrest during the DS, no genetic drift was detected between samples taken over that period, despite encompassing extreme population minima, whereas it was detected between samples spanning the RS. Accordingly, the variance in allele frequency increased with time over the RS, but not over the DS. However, not all the results agreed with aestivation. Large genetic distances separated samples taken a year apart, and during the first year, within-sample genetic diversity declined and increased back during the late RS, suggesting a bottleneck followed by migration. The decline of genetic diversity followed a mass distribution of insecticide treated nets was accompanied by a reduced mosquito density and a rise in the mutation conferring resistance to pyrethroids, indicating a bottleneck due to insecticidal selection. Overall, our results support aestivation in A. coluzzii during the DS that is accompanied by long distance migration in the late-RS.
Data from: Seasonality and locality affect the diversity of Anopheles gambiae and Anopheles coluzzii midgut microbiota from Ghana.
Symbiotic bacteria can have important implications in the development and competence of disease vectors. In Anopheles mosquitoes, the composition of the midgut microbiota is largely influenced by the larval breeding site, but the exact factors shaping this composition are currently unknown. Here, we examined whether the proximity to urban areas and seasons have an impact on the midgut microbial community of the two major malaria vectors in Africa, An. coluzzii and An. gambiae. Larvae and pupae were collected from selected habitats in two districts of Ghana during the dry and rainy season periods. The midgut microbiota of adults that emerged from these collections was determined by 454-pyrosequencing of the 16S ribosomal DNA. We show that in both mosquito species, Shewanellaceae constituted on average of 54% and 73% of the midgut microbiota from each site in the dry and rainy season, respectively. Enterobacteriaceae was found in comparatively low abundance below 1% in 22/30 samples in the dry season, and in 25/38 samples in the rainy season. Our data indicate that seasonality and locality significantly affect both the diversity of microbiota and the relative abundance of bacterial families with a positive impact of dry season and peri-urban settings.
FIGURE 6 in Anopheles coluzzii and Anopheles amharicus, new members of the Anopheles gambiae complex
FIGURE 6. Anopheles (Cellia) amharicus sp. n., larva (paratypes, WRBU digital image preps #2125 (A–D), #2126 (F): A, head, dorsal view; B, pecten plate; C, antenna, position of seta 1-A; D, abdomen, development of palmate setae (1-I–III); E, head, relative sizes and positions of setae 2-C and 3-C; F, thorax, branching of setae 1–3-P.
FIGURE 5 in Anopheles coluzzii and Anopheles amharicus, new members of the Anopheles gambiae complex
FIGURE 5. Anopheles (Cellia) amharicus sp. n., pupa (paratype, WRBU digital image prep #2125): A, trumpet showing lengths of meatus and pinna; B, segment VIII, distal, showing form of seta 9; C, paddles.
FIGURE 2 in Anopheles coluzzii and Anopheles amharicus, new members of the Anopheles gambiae complex
FIGURE 2. Anopheles (Cellia) coluzzii sp. n., pupa (holotype exuviae, WRBU digital image prep #2124): A, trumpet showing lengths of meatus and pinna; B, segment VIII, distal, showing form of seta 9; C, paddles.
FIGURE 4 in Anopheles coluzzii and Anopheles amharicus, new members of the Anopheles gambiae complex
FIGURE 4. Anopheles (Cellia) amharicus sp. n., adult female (holotype, WRBU digital image prep #2128): A, habitus; B, head, dorsolateral view showing detail of vertex and antennae; C, maxillary palpi; D, thorax, dorsal view; E, wing.
FIGURE 3 in Anopheles coluzzii and Anopheles amharicus, new members of the Anopheles gambiae complex
FIGURE 3. Anopheles (Cellia) coluzzii sp. n. larva (holotype exuviae, WRBU digital image prep #2124): A, head, dorsal view; B, head, relative sizes and positions of setae 2-C and 3-C; C, antenna, position of seta 1-A; D, abdomen, development of palmate setae (1-I–III); E, thorax, branching of setae 1–3-P; F, pecten plate.
FIGURE 1 in Anopheles coluzzii and Anopheles amharicus, new members of the Anopheles gambiae complex
FIGURE 1. Anopheles (Cellia) coluzzii sp. n., adult female (holotype, WRBU digital image prep #2127): A, habitus; B, head, lateral view showing detail of vertex and antennae; C, maxillary palpi; D, thorax, dorsal view; E, abdomen, dorsal view; F, wing.
Interrogation of the Seasonal Microbiome of Anopheles coluzzii in Mali
<p>These are the raw sequencing files (fastq) and scripts necessary to perform our analysis of the seasonal microbiome of <em>An. coluzzii </em>in Mali.</p>
Data from: Tracing the origin of the early wet-season Anopheles coluzzii in the Sahel
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Data from: Seasonality and locality affect the diversity of Anopheles gambiae and Anopheles coluzzii midgut microbiota from Ghana.
Open the record for dataset details and reuse information.
Anopheles coluzzii larval response to two purified Pseudomonas aeruginosa phenazine pigments 1-HP and Pyo.
GEO Series GSE89829. Anopheles gambiae; Anopheles coluzzii. 16 samples. Type: Expression profiling by array.
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