scholarly journals Role of Anopheles stephensi Mosquitoes in Malaria Outbreak, Djibouti, 2019

2021 ◽  
Vol 27 (6) ◽  
pp. 1697-1700
Author(s):  
Vincent Pommier de Santi ◽  
Bouh Abdi Khaireh ◽  
Thomas Chiniard ◽  
Bruno Pradines ◽  
Nicolas Taudon ◽  
...  
Keyword(s):  
Anopheles Stephensi ◽  
Malaria Outbreak

scholarly journals The role of midgut symbiotic bacteria in resistance of Anopheles stephensi (Diptera: Culicidae) to organophosphate insecticides

2017 ◽  
Vol 111 (6) ◽  
pp. 289-296 ◽  
Author(s):  
Aboozar Soltani ◽  
Hassan Vatandoost ◽  
Mohammad Ali Oshaghi ◽  
Ahmad Ali Enayati ◽  
Ali Reza Chavshin
Keyword(s):  
Anopheles Stephensi ◽  
Symbiotic Bacteria ◽  
Organophosphate Insecticides

Frequency-dependent prey selection by larvae of Toxorhynchites splendens (Diptera: Culicidae)

1996 ◽  
Vol 86 (6) ◽  
pp. 633-639 ◽  
Author(s):  
D. Dominic Amalraj ◽  
P. K. Das
Keyword(s):  
Aedes Aegypti ◽  
Foraging Behaviour ◽  
Anopheles Stephensi ◽  
Prey Size ◽  
Prey Selection ◽  
Fourth Instar ◽  
Frequency Dependent ◽  
Size Selection ◽  
The Stability

AbstractThe foraging behaviour of frequency-dependent prey selection by larval instars of Toxorhynchites splendens (Wiedemann) was studied in the laboratory. Prey size selection (second vs fourth instars of Aedes aegypti Linnaeus or Anopheles stephensi Liston) by third and fourth instar predators was frequency-dependent. However, in the case of second instar predators, prey size selection was not frequency-dependent and the predator preferred second instar to fourth instar prey. When offered second instars of Aedes aegypti and Anopheles stephensi the preference for one species over the other was frequency-dependent in all the three predator instars. The role of frequency-dependent prey selection in the stability of prey—predator interaction at low equilibrium levels is discussed.

scholarly journals The Microbiota of Three Anopheles Species in China

2021 ◽  
Vol 37 (1) ◽  
pp. 38-40
Author(s):  
Yuebiao Feng ◽  
Jianxia Tang ◽  
Dan Zhu ◽  
Yi Zhang ◽  
Guoding Zhu ◽  
...  
Keyword(s):  
Population Structure ◽  
Anopheles Stephensi ◽  
Vector Competence ◽  
The Other ◽  
Anopheles Dirus ◽  
Anopheles Species ◽  
Linear Discriminant ◽  
Rrna Sequencing ◽  
Anopheles Lesteri

ABSTRACT Microbiota are vital for the development, physiology, and vectorial capacity of mosquitoes. The composition and role of microbiota in Anopheles species, especially Anopheles gambiae and Anopheles stephensi, have been extensively studied, but little is known about the microbiota of Anopheles species in China. We characterized the microbial communities of Anopheles dirus, Anopheles sinensis, and Anopheles lesteri by 16S rRNA sequencing. There were distinct differences in the composition of microbiota in An. lesteri and the other 2 species. The discriminatory genera in the 3 species were analyzed by the linear discriminant analysis effect size method. Our results provide an overview of the population structure of microbiota in 3 native Anopheles species and will pave the way for further understanding of their role in mosquito physiology and vector competence.

scholarly journals Plasmodium Infections in Anopheles Mosquitoes in Ubon Ratchathani Province, Northeastern Thailand During a Malaria Outbreak

2018 ◽  
Vol 34 (1) ◽  
pp. 11-17 ◽  
Author(s):  
Anchana Sumarnrote ◽  
Vincent Corbel ◽  
Hans J. Overgaard ◽  
Olivier Celhay ◽  
Nattapol Marasri ◽  
...  
Keyword(s):  
Malaria Transmission ◽  
Malaria Vectors ◽  
Anopheles Species ◽  
Community Activities ◽  
Anopheles Mosquitoes ◽  
Human Landing ◽  
Suitable Habitats ◽  
Malaria Outbreak ◽  
Northeastern Thailand

ABSTRACT An unprecedented malaria outbreak occurred in Ubon Ratchathani Province, northeastern Thailand, in 2014. The province showed the highest number of malaria cases of all Thai provinces. Five entomological surveys were conducted at 8 sentinel sites from September 2013 to September 2015 to address the role of different Anopheles species in malaria transmission. Mosquito collections were conducted using human landing catches and cow bait. A total of 10,369 Anopheles mosquitoes were collected and 2,240 were morphologically identified as potential malaria vectors, including An. dirus (n = 78), An. minimus (n = 18), An. sawadwongporni (n = 4), An. barbirostris s.l. (n = 819), An. philippinensis (n = 612), An. nivipes (n = 676), An. annularis (n = 42), An. aconitus (n = 7), and An. rampae (n = 142). Real-time polymerase chain reaction was used to screen for the presence of Plasmodium spp. in salivary glands. The proportion of primary vectors of surveyed villages was very low (<1%), and no Plasmodium-infected specimens were detected among in the 2,240 Anopheles mosquitoes tested. The absence of positive Plasmodium samples during malaria outbreaks suggests that malaria transmission most likely occurred outside the villages, particularly in the deep-forested hilly areas that provided suitable habitats for competent malaria vectors. These results emphasize the need to develop vector control related to village community activities to reduce malaria transmission along Thailand border areas.

scholarly journals Genome Sequences of Staphylococcus hominis Strains ShAs1, ShAs2, and ShAs3, Isolated from the Asian Malaria Mosquito Anopheles stephensi

2016 ◽  
Vol 4 (2) ◽  
Author(s):  
Grant L. Hughes ◽  
Juan Antonio Raygoza Garay ◽  
Vikas Koundal ◽  
Jason L. Rasgon ◽  
Michael M. Mwangi
Keyword(s):  
Anopheles Stephensi ◽  
Draft Genome ◽  
Malaria Mosquito ◽  
Genome Sequences ◽  
Genomic Resources ◽  
Bacterial Microbiome ◽  
Staphylococcus Hominis

Staphylococcus hominis is a culturable component of the bacterial microbiome of Anopheles stephensi . Here, we present the annotated draft genome sequences of three S. hominis isolates from A. stephensi . These genomic resources will facilitate experiments to further our understanding of the role of bacteria in mosquito biology.

scholarly journals Biochemical Basis of Cyfluthrin and DDT Resistance in Anopheles stephensi (Diptera: Culicidae) in Malarious Area of Iran

2018 ◽  
Author(s):  
Mohammad Amin Gorouhi ◽  
Mohammad Ali Oshaghi ◽  
Hassan Vatandoost ◽  
Ahmad Ali Enayati ◽  
Ahmad Raeisi ◽  
...  
Keyword(s):  
Anopheles Stephensi ◽  
Indian Subcontinent ◽  
Management Strategies ◽  
Resistance Management ◽  
Cytochrome P450s ◽  
Enzyme Assays ◽  
Biochemical Basis ◽  
Development Of Resistance ◽  
Ddt Resistance

Background: Anopheles stephensi is a key urban malaria vector in the Indian subcontinent and Middle East includ­ing south and southeast of Iran. Wide application of insecticides resulted in resistance of this species to various insec­ticides in these regions. This study was conducted to reveal the role of metabolic mechanisms in the development of resistance in An. stephensi to DDT and cyfluthrin. Methods: Field mosquito specimens were collected from Chabahar Seaport, southeast corner of Iran, in 2015. Insec­ticide susceptibility and enzyme assays were conducted as recommended by WHO. Results: Mean enzyme ratios were 3.95 and 3.04 for α- esterases and 2.40 and 1.97 for β- esterases in the DDT and cyfluthrin- resistant populations correspondingly compared with the susceptible strain. The GSTs enzyme mean ac­tivity ratios were 5.07 and 2.55 in the DDT and cyfluthrin- resistant populations compared with the susceptible beech strain. The cytochrome p450s enzyme ratios were 1.11 and 1.28 in the DDT and cyfluthrin- resistant populations respectively compared with the susceptible beech strain. Conclusion: Metabolic mechanisms play a crucial role in the development of DDT and cyfluthrin resistance in An. stephensi, therefore, further evaluation of the mechanisms involved as well as implementation of proper insecticide resistance management strategies are recommended.

scholarly journals The role of proboscis of the malaria vector mosquito Anopheles stephensi in host-seeking behavior

2011 ◽  
Vol 4 (1) ◽  
pp. 10 ◽  
Author(s):  
Emi Maekawa ◽  
Hiroka Aonuma ◽  
Bryce Nelson ◽  
Aya Yoshimura ◽  
Fumio Tokunaga ◽  
...  
Keyword(s):  
Malaria Vector ◽  
Anopheles Stephensi ◽  
Host Seeking ◽  
Vector Mosquito ◽  
Seeking Behavior
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