1
|
Vargas-Abasolo R, Rivera-Duarte JD, Almaraz-Valle VM, Mejia-Mandujano M, Aguilar-Marcelino L, Córdoba-Aguilar A. Thinking green: Insecticidal effect of biorational solutions against Triatoma pallidipennis Stal (Hemiptera: Triatominae). Acta Trop 2024; 252:107152. [PMID: 38382592 DOI: 10.1016/j.actatropica.2024.107152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 02/15/2024] [Accepted: 02/15/2024] [Indexed: 02/23/2024]
Abstract
The control of triatomine vectors depends almost exclusively on conventional insecticides. These compounds can, nevertheless, cause negative effects on environmental and human health as well as induce resistance in triatomines. Therefore, we need to look for more sustainable alternatives. Triatoma pallidipennis is one of the main chagasic vectors in Mexico. We evaluated the insecticidal effectiveness of two oils (neem and cinnamon), and two desiccants (potassium salts of fatty acids and diatomaceous earth), on 3rd instar nymphs of T. pallidipennis. The laboratory test involved direct exposure of the treatments to the insects. We found that diatomaceous earths caused 80 % mortality of nymphs after 30 days. Meanwhile, the cumulative mortality for the other treatments did not exceed 50 %. When applied to inert surfaces, the powder formulation of diatomaceous earth demonstrated greater effectiveness than the aqueous suspension. Thus, diatomaceous earth could be a promising alternative for an environmentally friendly control of triatomines.
Collapse
Affiliation(s)
- Reyna Vargas-Abasolo
- Departamento de Ecología Evolutiva, Instituto de Ecología, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Coyoacán, Ciudad de México 04510, Mexico
| | - José D Rivera-Duarte
- Departamento de Ecología y Recursos Naturales, Escuela de Biología, Facultad de Ciencias, Universidad Nacional Autónoma de Honduras, Honduras
| | - Víctor Manuel Almaraz-Valle
- Programa de Entomología y Acarología, Colegio de Postgraduados Campus Montecillo, Km. 36.5, Montecillo, Texcoco, Estado de México 56230, Mexico
| | - Mario Mejia-Mandujano
- Programa de Entomología y Acarología, Colegio de Postgraduados Campus Montecillo, Km. 36.5, Montecillo, Texcoco, Estado de México 56230, Mexico
| | - Liliana Aguilar-Marcelino
- Centro Nacional de Investigación Disciplinaria en Salud Animal e Inocuidad, INIFAP, Carretera Cuernavaca-Cuautla 8534, Col. Progreso, Jiutepec, Morelos 62550, Mexico
| | - Alex Córdoba-Aguilar
- Departamento de Ecología Evolutiva, Instituto de Ecología, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Coyoacán, Ciudad de México 04510, Mexico.
| |
Collapse
|
2
|
Busselman RE, Curtis-Robles R, Meyers AC, Zecca IB, Auckland LD, Hodo CL, Christopher D, Saunders AB, Hamer SA. Abundant triatomines in Texas dog kennel environments: Triatomine collections, infection with Trypanosoma cruzi, and blood feeding hosts. Acta Trop 2024; 250:107087. [PMID: 38061614 DOI: 10.1016/j.actatropica.2023.107087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2023] [Revised: 11/26/2023] [Accepted: 11/28/2023] [Indexed: 12/18/2023]
Abstract
Triatomine insects are vectors of the protozoan parasite Trypanosoma cruzi- the causative agent of Chagas disease. Chagas disease is endemic to Latin America and the southern United States and can cause severe cardiac damage in infected mammals, ranging from chronic disease to sudden death. Identifying interactions among triatomines, T. cruzi discrete typing units (DTUs), and blood feeding hosts is necessary to understand parasite transmission dynamics and effectively protect animal and human health. Through manual insect trapping efforts, kennel staff collections, and with the help of a trained scent detection dog, we collected triatomines from 10 multi-dog kennels across central and south Texas over a one-year period (2018-2019) and tested a subset to determine their T. cruzi infection status and identify the primary bloodmeal hosts. We collected 550 triatomines, including Triatoma gerstaeckeri (n = 515), Triatoma lecticularia (n = 15), Triatoma sanguisuga (n = 6), and Triatoma indictiva (n = 2), with an additional 10 nymphs and 2 adults unable to be identified to species. The trained dog collected 42 triatomines, including nymphs, from areas not previously considered vector habitat by the kennel owners. Using qPCR, we found a T. cruzi infection prevalence of 47 % (74/157), with T. lecticularia individuals more likely to be infected with T. cruzi than other species. Infected insects harbored two T. cruzi discrete typing units: TcI (64 %), TcIV (23 %), and mixed TcI/TcIV infections (13 %). Bloodmeal host identification was successful in 50/149 triatomines, revealing the majority (74 %) fed on a dog (Canis lupus), with other host species including humans (Homo sapiens), raccoons (Procyon lotor), chickens (Gallus gallus), wild pig (Sus scrofa), black vulture (Coragyps atratus), cat (Felis catus), and curve-billed thrasher (Toxostoma curviostre). Given the frequency of interactions between dogs and infected triatomines in these kennel environments, dogs may be an apt target for future vector control and T. cruzi intervention efforts.
Collapse
Affiliation(s)
- R E Busselman
- Department of Veterinary Integrative Biosciences, Texas A&M University, College Station, TX, United States
| | - R Curtis-Robles
- Department of Veterinary Integrative Biosciences, Texas A&M University, College Station, TX, United States
| | - A C Meyers
- Department of Veterinary Integrative Biosciences, Texas A&M University, College Station, TX, United States
| | - I B Zecca
- Department of Veterinary Integrative Biosciences, Texas A&M University, College Station, TX, United States
| | - L D Auckland
- Department of Veterinary Integrative Biosciences, Texas A&M University, College Station, TX, United States
| | - C L Hodo
- Department of Veterinary Integrative Biosciences, Texas A&M University, College Station, TX, United States; Michale E. Keeling Center for Comparative Medicine and Research, The University of Texas MD Anderson Cancer Center, Bastrop, TX, United States
| | | | - A B Saunders
- Department of Small Animal Clinical Sciences, Texas A&M University, College Station, TX, United States
| | - S A Hamer
- Department of Veterinary Integrative Biosciences, Texas A&M University, College Station, TX, United States.
| |
Collapse
|
3
|
Beatty NL, Bhosale CR, Torhorst CW, Burkett-Cadena ND, Oi FM, Forsyth CJ, Wisely SM. Integrated pest management strategies targeting the Florida kissing bug, Triatoma sanguisuga: Preventing this vector of Chagas disease from invading your home. CURRENT RESEARCH IN PARASITOLOGY & VECTOR-BORNE DISEASES 2023; 4:100144. [PMID: 37841307 PMCID: PMC10570570 DOI: 10.1016/j.crpvbd.2023.100144] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Revised: 09/10/2023] [Accepted: 09/19/2023] [Indexed: 10/17/2023]
Abstract
Triatomines (Hemiptera: Reduviidae: Triatominae), commonly called "kissing bugs", are blood-sucking pests and vectors of the protozoan parasite Trypanosoma cruzi, the causative agent of Chagas disease (CD). Eleven species of kissing bugs occur throughout the southern half of the USA, four of which are well known to invade human dwellings. Certain kissing bugs in the USA are known to transmit T. cruzi to humans and other animals and their bites can also lead to serious allergic reactions, including anaphylaxis. In Florida, the kissing bug Triatoma sanguisuga frequently invades homes, bites residents, and has been found infected with T. cruzi, placing humans and companion animals at risk for CD. This review outlines integrated pest management (IPM) strategies for minimizing human exposure to T. sanguisuga and CD. A comprehensive IPM plan for kissing bugs includes detailed inspections, removal of vertebrate host nesting areas, and kissing bug harborage, home improvements to exclude kissing bugs from entering structures, pest removal, and judicious use of pesticides. This approach can limit or eliminate kissing bug entry into residential structures, thereby preventing kissing bug bites, and CD infections in humans and companion animals.
Collapse
Affiliation(s)
- Norman L. Beatty
- University of Florida College of Medicine, Department of Medicine, Division of Infectious Diseases and Global Medicine, Gainesville, FL, USA
- Emerging Pathogens Institute, University of Florida, Gainesville, FL, USA
| | - Chanakya R. Bhosale
- Nova Southeastern University Dr. Kiran C. Patel College of Osteopathic Medicine, Fort Lauderdale, Florida, USA
| | - Carson W. Torhorst
- University of Florida Institute of Food and Agricultural Sciences, Department of Wildlife Ecology and Conservation, Gainesville, FL, USA
| | - Nathan D. Burkett-Cadena
- Florida Medical Entomology Laboratory, University of Florida Institute of Food and Agricultural Sciences, Vero Beach, FL, USA
| | - Faith M. Oi
- University of Florida Institute of Food and Agricultural Sciences, Entomology and Nematology Department, Gainesville, FL, USA
| | | | - Samantha M. Wisely
- Emerging Pathogens Institute, University of Florida, Gainesville, FL, USA
- University of Florida Institute of Food and Agricultural Sciences, Department of Wildlife Ecology and Conservation, Gainesville, FL, USA
| |
Collapse
|