Loss of genetic diversity in Culex quinquefasciatus targeted by a lymphatic filariasis vector control program in Recife, Brazil

2011 ◽  
Vol 105 (9) ◽  
pp. 491-499 ◽  
Author(s):  
Marina F.S. Cartaxo ◽  
Constância F.J. Ayres ◽  
David Weetman
Keyword(s):  
Genetic Diversity ◽  
Vector Control ◽  
Lymphatic Filariasis ◽  
Culex Quinquefasciatus ◽  
Control Program ◽  
Vector Control Program ◽  
Loss Of Genetic Diversity ◽  
Filariasis Vector

scholarly journals Tabel Hidup Nyamuk Vektor Filariasis Limfatik Culex quinquefasciatus (Diptera: Culicidae) di Laboratorium

2019 ◽  
Vol 18 (2) ◽  
pp. 73
Author(s):  
Tri Ramadhani ◽  
Vina Yuliani ◽  
Upik Kesumawati Hadi ◽  
Susi Soviana ◽  
Zubaidah Irawati
Keyword(s):  
Lymphatic Filariasis ◽  
Culex Quinquefasciatus ◽  
Generation Time ◽  
Control Program ◽  
Wuchereria Bancrofti ◽  
Reproductive Rate ◽  
Reproduction Rate ◽  
Net Reproductive Rate ◽  
Vector Control Program ◽  
Vector Borne

Latar belakang: Kelangsungan hidup nyamuk merupakan aspek yang penting dalam penularan penyakit tular vektor. Culex quinquefasciatus merupakan vektor filariasis limfatik yang disebabkan oleh wuchereria bancrofti. Pengetahuan kehidupan nyamuk berperan penting dalam keberhasilan program pengendalian vektor. Tujuan penelitian ini mendiskripsikan tabel hidup nyamuk Cx. quinquefasciatus di laboratorium.Metode: Penelitian diawali dengan koleksi larva Cx. quinquefasciatus di  Kota Pekalongan, kemudian diidentifikasi dan kolonisasi dalam kondisi laboratorium. Parameter yang diukur meliputi masa inkubasi, ekslosi, eksdisis, ketahanan hidup, laju reproduksi, waktu generasi dan laju pertumbuhan intrinsik.  Hasil: Cx. quinquefasciatus mempunyai siklus hidup 12.5 hari. Umur telur, larva, dan pupa masing-masing adalah 2.07; 10.2; dan  2.25 hari. Nyamuk jantan mempunyai ketahanan hidup yang lebih pendek dibandingkan betina. Laju reproduksi  bersih (Ro) sebesar 196.75, laju pertumbuhan intrinsik 0.35  dan waktu generasi (T) 14.91 hari.Simpulan: Pertumbuhan populasi Cx. quinquefasciatus  dapat diatur dan dikendalikan oleh kelulusan hidup dan mortalitas. ABSTRACTTitle: The Live Table of Vector Lymphatic Filariasis Culex quinquefasciatus (Diptera: Culicidae) in the LaboratoryBackground: The survival of a mosquito is an important aspect in the transmission of vector borne disease. Culex quinquefasciatus, which is a vector of lymphatic filariasis caused by wuchereria bancrofti. The knowledge of mosquito life is important in providing the foundation for the success of the vector control program. The research  aim to describe the life table Cx. quinquefasciatus in the laboratoryMethods:. This study was originated from the collecting larve  of Cx. quinquefasciatus from Pekalongan City, which were then identified and colonized under laboratory conditions. Parameters measured include the incubation period, ekslosi, eksdisis, survival rate, reproduction rate, and generation time.Results:The results showed that Cx. quinquefasciatus has a 12.5 day life cycle. Egg, larva, and pupa respectively were 2.07; 10.2; and 2.25 days. The males have a shorter survival period compared to  the  females. The net  reproductive  rate  (Ro)  was  196.75;  the  intrinsic  growth  rate  (rm)  was  0.35  and  the average generation time (T) was 14.91 days.Conclusion : The population growth of Culex quinquefasciatus can be regulated and controlled by life graduation and mortality 

scholarly journals Assessment of Aedes aegypti Pupal Productivity during the Dengue Vector Control Program in a Costal Urban Centre of São Paulo State, Brazil

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Marylene de Brito Arduino
Keyword(s):  
Vector Control ◽  
Large City ◽  
Control Program ◽  
Sao Paulo ◽  
São Paulo ◽  
Dengue Vector ◽  
Urban Centre ◽  
Vector Control Program ◽  
Productivity Indices ◽  
Dengue Vector Control

The control of dengue relies on the elimination of vector breeding sites. This study identified the container categories most productive for A. aegypti within the framework of the São Paulo dengue vector control program (DVCP) in São Sebastião, a large city located on the state’s coast where dengue cases have occurred since 2001. Containers were inspected monthly for the occurrence of mosquito immature stages during two consecutive vector-breeding seasons in 2002–2004. Containers were classified by their material, use, and fixed or removable status. Pupal productivity differed significantly among container types, items made of metal and plastic, and boats being those with the highest relative contribution. Significant correlations between traditional indices of A. aegypti abundance (Container Index, House Index, and Breteau Index) and pupal productivity/demographic indices (Pupae/Container, Pupae/House, Pupae/ha, and Pupae/Person) ranged 0.56–0.65; correlations were not statistically significant for any combination involving the Pupae/Container index. The assessment of pupal productivity indices could be incorporated into the DVCP without any additional operational onus, allowing vector control managers to determine appropriate control actions targeting the most productive containers and sites. Further studies are needed to assess whether pupal productivity indices may be used as epidemiological indicators of risk of dengue transmission.

scholarly journals Effectiveness of Large-Scale Chagas Disease Vector Control Program in Nicaragua by Residual Insecticide Spraying Against Triatoma dimidiata

2015 ◽  
Vol 93 (6) ◽  
pp. 1231-1239 ◽  
Author(s):  
Kota Yoshioka ◽  
Jiro Nakamura ◽  
Lenin Pérez ◽  
Yuichiro Tabaru ◽  
Doribel Tercero ◽  
...  
Keyword(s):  
Vector Control ◽  
Chagas Disease ◽  
Large Scale ◽  
Control Program ◽  
Disease Vector ◽  
Vector Control Program

scholarly journals Transcriptomic analysis of insecticide resistance in the lymphatic filariasis vector Culex quinquefasciatus

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Walter Fabricio Silva Martins ◽  
Craig Stephen Wilding ◽  
Alison Taylor Isaacs ◽  
Emily Joy Rippon ◽  
Karine Megy ◽  
...  
Keyword(s):  
Insecticide Resistance ◽  
Lymphatic Filariasis ◽  
Culex Quinquefasciatus ◽  
Transcriptomic Analysis ◽  
Filariasis Vector

scholarly journals Multiple Insecticide Resistance: An Impediment to Insecticide-Based Malaria Vector Control Program

PLoS ONE ◽  
2011 ◽  
Vol 6 (1) ◽  
pp. e16066 ◽  
Author(s):  
Delenasaw Yewhalaw ◽  
Fantahun Wassie ◽  
Walter Steurbaut ◽  
Pieter Spanoghe ◽  
Wim Van Bortel ◽  
...  
Keyword(s):  
Insecticide Resistance ◽  
Vector Control ◽  
Malaria Vector ◽  
Control Program ◽  
Malaria Vector Control ◽  
Vector Control Program

scholarly journals The occurrence of synanthropic triatomines in Bahia, Brazil: what changed after 40 years of the vector-control program?

2020 ◽  
Author(s):  
Gilmar Ribeiro ◽  
Cristiane Medeiros Moraes de Carvalho ◽  
Renato Freitas de Araújo ◽  
Fernanda Cardoso Lanza ◽  
Diego Lopes Paim Miranda ◽  
...  
Keyword(s):  
Vector Control ◽  
Chagas Disease ◽  
Relative Abundance ◽  
Disease Transmission ◽  
Control Program ◽  
The State ◽  
Triatoma Infestans ◽  
Entomological Surveillance ◽  
Triatomine Species ◽  
Vector Control Program

Abstract Background: This study presents a descriptive analysis of the occurrence of synanthropic triatomine species in the state of Bahia, before and after the implementation of the vector control program. Methods: Occurrence and number of collected specimens in the municipalities were analyzed in two periods: (A) 1957 to 1971, before systematic vector control actions; and (B) 2006 to 2019, after the certification of interruption of Chagas disease transmission by Triatoma infestans. Results: In total, 17 species were recorded during period A and 21 during period B. Panstrongylus megistus was the most frequent species in period A (42%), while Triatoma pseudomaculata (42%) and T. sordida (38%) were more frequent in period B. In period A, T. infestans was found in 26 (9%) municipalities, and in period B it was found in 7 (2%). During period B, most triatomines (88%) were captured at the peridomestic habitats, with a predominance of T. sordida (85%). Species with greatest relative abundance within the household were T. sordida (49%), T. brasiliensis (27%), and T. pseudomaculata (15%). Conclusions: We have observed a clear reduction in the occurrence of P. megistus and T. infestans and an increase in the relative abundance and geographical distribution of T. sordida and T. pseudomaculata after 40 years of the vector-control program. High frequency of other triatomine species in the municipalities of the state of Bahia and a great abundance of T. sordida in recent years, highlight the need to reinforce permanent entomological surveillance actions for Chagas disease.

scholarly journals First Observations of Plasmodium Malariae and Its Evolution During the Parasitological Evaluation of the Long-term Village Scale Malaria Vector Control Program in the Balombo Area of Angola

2021 ◽  
Author(s):  
Sylvie Manguin ◽  
Vincent Foumane ◽  
Jean-Claude Toto ◽  
Franck Martinaud ◽  
Maria Adelaide Dos Santos ◽  
...  
Keyword(s):  
Vector Control ◽  
Control Program ◽  
Plasmodium Malariae ◽  
Malaria Vector Control ◽  
Insecticide Treated Nets ◽  
Medical Department ◽  
Species Determination ◽  
Cross Sectional ◽  
Vector Control Program

Abstract Background: A long-term village scale vector control program was implemented in eight villages around the Balombo town (Benguela Province, Angola) to compare the efficacy of four methods of vector control inside houses including long-lasting deltamethrin insecticide treated nets (PermaNet© 2.0 model or P.2.0); association of P.2.0 and deltamethrin Insecticide Treated Plastic Sheeting (ITPS)-Zero Fly© model; deltamethrin ITPS-Wall Lining model alone; and 2 rounds of lambdacyhalothrin Inside Residual Spraying followed by installation of ITPS.Methods: Cross sectional parasitological surveys (CSS) were done every two months. Thick blood films (TBF) were microscopically examined at the Medical Department of the Angolese Sonamet company in Lobito and a sample of them were double-checked in Yaoundé. Plasmodium species determination, parasitaemia and gametocytes presence, and evolution in time were analyzed.Results: A total of 190 CSS was done between 2007 and 2011, Plasmodium spp. were observed in 5,431 of the 21,804 TBF done. Plasmodium malariae alone was observed in 22 TBF (0.4%) and mixed infections P. falciparum and P. malariae in 44 TBF (0.8%).Conclusion: The very low frequency of P. malariae could explain the fact it is usually not reported in classical point prevalence surveys. Our study confirms the presence of this species in Angola, which must be known due to its special clinical impact, quartan fever, kidney failure, chronicity, symptomless carriers, persistence for several years with long term recrudescence and reported cases of resistance to classical ACTs. The prevalence of P. malariae decreased after implementation of vector control methods.

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