Culicidae fauna, biological control of dengue vectors and community participation in tropical countries

Inhaltsverzeichnis (Table of Contents)

• Abstract
• Introduction
• Materials and Methods
  • Mosquito fauna in the district of Chulucanas
    • Larvae collection, larval density, biotic & abiotic data
    • Larvae identification
  • Residual effect test of Bti- and Temephos-based larvicides
    • Residual effect tests in large water volumes
    • Residual effect tests in small water volumes
  • Efficacy test in houses and interview regarding community participation
    • Efficacy test
    • Interview
• Results
  • Mosquito fauna in the district of Chulucanas
    • Breeding site in Chulucanas city, Sector Nr. 20
    • Breeding site in Chulucanas city, Sector Nr. 4
    • Breeding site in Yapatera town
    • Breeding site in Campanas town
    • Breeding site in Charanal town
    • Breeding site in Paccha town
  • Residual effect test of Bti- and Temephos-based larvicides
    • Residual effect tests in large water volumes
    • Residual effect tests in small water volumes
  • Efficacy test in houses and interview regarding community participation
    • Efficacy test
    • Interview
• Discussion
  • Mosquito (Culicidae) fauna in the district of Chulucanas
  • Residual effect test of Bti- and Temephos-based larvicides
  • Efficacy test in houses and interview regarding community participation
• Acknowledgements
• References

Zielsetzung und Themenschwerpunkte (Objectives and Key Themes)

This Bachelor thesis aimed to evaluate the mosquito fauna in the Chulucanas district of Peru and assess the efficacy of different larvicides for controlling Aedes aegypti, the vector of dengue fever. The research focused on three key areas:

• Identifying the mosquito species present in Chulucanas and their breeding sites.
• Comparing the residual effects of Bti-based Culinex Tab plus® and Temephos-based Temefar® 1%G larvicides.
• Analyzing the efficacy of Culinex Tab plus® in real-world settings and exploring the role of community participation in dengue vector control.

Zusammenfassung der Kapitel (Chapter Summaries)

This chapter summarizes the findings on the mosquito fauna in the Chulucanas district, including the identification of 7 species (Ae. aegypti, Ae. scapularis, Ae. serratus, An. albimanus, An. pseudopunctipennis, Cx. nigripalpus, Cx. pipiens quinquefasciatus) and 5 unidentified larvae. The chapter further discusses the abiotic and biotic conditions found in each breeding site and provides detailed information on the geographical distribution, vector capacity, and ecological preferences of each identified species.

This chapter details the results of the residual effect tests of Bti- and Temephos-based larvicides. Temephos-based Temefar® 1%G demonstrated superior persistence than Bti-based Culinex Tab plus® in both large and small water volumes. While Culinex Tab plus® showed promising initial efficacy, its persistence was influenced by factors like dust contamination and water volume, suggesting the need for further research and development of more resistant formulations.

This chapter presents the findings of the efficacy test conducted in three households in Chulucanas city, confirming a 100% mortality rate of Ae. aegypti larvae after 24 hours of Culinex Tab plus® application. The interview conducted with residents of these households revealed varying levels of knowledge and attitudes towards larvicides and community participation in dengue vector control, highlighting the need for effective community engagement strategies.

Schlüsselwörter (Keywords)

This research focused on the Culicidae fauna, biological control of dengue vectors, specifically the Aedes aegypti mosquito, in tropical countries. The study investigated the effectiveness of different larvicides, including Bti-based Culinex Tab plus® and Temephos-based Temefar® 1%G, and the impact of community participation on vector control programs. Key themes included mosquito species identification, breeding site analysis, residual effect testing, efficacy evaluation, and community engagement.