Vector transmission

Brenière, Simone Frédérique; Villacís, Anita G.; Aznar, Christine

doi:10.1016/b978-0-12-801029-7.00023-x

Cited by 16 publications

(5 citation statements)

References 103 publications

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“…Approximately half of the typical houses in that area have at least one crevice in their walls, which apparently serves as a hiding place for triatomines (some nymphs were found in them). These houses also have building characteristics averse to triatomine invasion (Breniere et al 2017); however, inhabitants reported observing T. picturata entering houses at night through open windows/doors or through small hollows in the roof or walls. Special attention should be paid to the resting sites of intra-domestic pets, since a high number of T. picturata specimens were collected there, some infected with T. cruzi .…”

Section: Discussionmentioning

confidence: 99%

“…The remaining third of the houses had a roof of metal sheets, cement-lined walls, and concrete floors. These houses did not have characteristics compatible with triatomine invasion (Brenière et al 2017). In Juan Gil Preciado, 90.7% of studied houses had an intra-domiciliary animal (dogs or cats [ Felis silvestris catus L.]), and all houses had peri-domestic animals, the most frequent of which were dogs, chickens, and horses.…”

Section: Discussionmentioning

confidence: 99%

“…Some of the most important conditions include the presence of triatomines inside human dwellings, as well as the presence of domiciliary reservoir hosts (mainly dogs), the level of knowledge of the human population about the disease, and the type and conservation of materials used for building homes. Understanding these conditions could lead to the development of improved measures to control the vectors by focusing efforts on controlling every species of triatomine relevant for public health in its specific microhabitat (Brenière et al 2017). A diverse array of studies have characterized human dwellings invaded by different species of triatomines.…”

Section: Introductionmentioning

confidence: 99%

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Infection with Trypanosoma Cruzi Chagas and Characterization of Human Habitats of Triatoma Picturata (Usinger) in Western Mexico

Meraz-Medina,

Rúa-Vázquez,

Montealegre-Bautista

et al. 2023

Journal of Vector Ecology

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Chagas disease is one of the most important vector-borne diseases in Latin America. Triatoma picturata (Usinger), distributed in western Mexico, is one of the most important vectors of Trypanosoma cruzi Chagas. Knowing the type and materials used for building homes could lead to improved methods for controlling triatomines by focusing efforts on controlling every species of triatomine in its specific microhabitat. Houses in three studied localities of western Mexico that harbored T. picturata were characterized, as well as two entomological indices. Infestation Index values varied from 10.8% to 51.9% in the three localities, whereas Natural Infection Index values varied from 18.1% to 35.2%. Characteristics of houses invaded by T. picturata also varied. In Juan Gil Preciado, with the highest Entomological Index values, most houses were built of adobe walls with a roof of clay tiles and a dirt floor, and included the presence of domestic animals. Our data indicate that the potential risk of infection with T. cruzi differs markedly for inhabitants of the three studied localities, which demonstrates the importance of studying local populations of triatomines. Our study should contribute to decision-making regarding triatomine control efforts by providing profiles of houses that are more susceptible to triatomine invasion.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Infection with Trypanosoma Cruzi Chagas and Characterization of Human Habitats of Triatoma Picturata (Usinger) in Western Mexico

Meraz-Medina,

Rúa-Vázquez,

Montealegre-Bautista

et al. 2023

Journal of Vector Ecology

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“…Hematophagous triatomine bugs, better known as kissing bugs, are responsible for two-thirds of the infections [2,12,20]. To date, 150 species of the subfamily Triatominae capable of transmitting T. cruzi have been recognized, which are endemic in some regions of the Americas [1,8,13,19,[33][34][35]. The other forms of transmission of the disease are maternal-fetal transmission (26%) and transmission associated with the transplantation of infected organs and blood products (~1%) [7,9,36].…”

Section: Biology and Transmission Routes Of Trypanosoma Cruzimentioning

confidence: 99%

Chagas Heart Disease: Beyond a Single Complication, from Asymptomatic Disease to Heart Failure

Montalvo-Ocotoxtle

Rojas‐Velasco

Rodríguez-Morales

et al. 2022

JCM

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Chagas cardiomyopathy (CC), caused by the protozoan Trypanosoma cruzi, is an important cause of cardiovascular morbidity and mortality in developing countries. It is estimated that 6 to 7 million people worldwide are infected, and it is predicted that it will be responsible for 200,000 deaths by 2025. The World Health Organization (WHO) considers Chagas disease (CD) as a Neglected Tropical Disease (NTD), which must be acknowledged and detected in time, as it remains a clinical and diagnostic challenge in both endemic and non-endemic regions and at different levels of care. The literature on CC was analyzed by searching different databases (Medline, Cochrane Central, EMBASE, PubMed, Google Scholar, EBSCO) from 1968 until October 2022. Multicenter and bioinformatics trials, systematic and bibliographic reviews, international guidelines, and clinical cases were included. The reference lists of the included papers were checked. No linguistic restrictions or study designs were applied. This review is intended to address the current incidence and prevalence of CD and to identify the main pathogenic mechanisms, clinical presentation, and diagnosis of CC.

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“…Chagas disease is one of the NTDs that require sustainable control programmes. It is caused by a protozoan, Trypanosoma cruzi , which is usually transmitted to humans by triatomine bug vectors in Latin American counties [ 6 ]. Since the triatomine vectors usually infest poorly constructed dwellings, Chagas disease affects disproportionally the poor.…”

Section: Introductionmentioning

confidence: 99%

Implementing a vector surveillance-response system for chagas disease control: a 4-year field trial in Nicaragua

et al. 2017

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Background: Chagas disease is one of the neglected tropical diseases (NTDs). International goals for its control involve elimination of vector-borne transmission. Central American countries face challenges in establishing sustainable vector control programmes, since the main vector, Triatoma dimidiata, cannot be eliminated. In 2012, the Ministry of Health in Nicaragua started a field test of a vector surveillance-response system to control domestic vector infestation. This paper reports the main findings from this pilot study. Methods: This study was carried out from 2012 to 2015 in the Municipality of Totogalpa. The Japan International Cooperation Agency provided technical cooperation in designing and monitoring the surveillance-response system until 2014. This system involved 1) vector reports by householders to health facilities, 2) data analysis and planning of responses at the municipal health centre and 3) house visits or insecticide spraying by health personnel as a response. We registered all vector reports and responses in a digital database. The collected data were used to describe and analyse the system performance in terms of amount of vector reports as well as rates and timeliness of responses. Results: During the study period, T. dimidiata was reported 396 times. Spatiotemporal analysis identified some high-risk clusters. All houses reported to be infested were visited by health personnel in 2013 and this response rate dropped to 39% in 2015. Rates of insecticide spraying rose above 80% in 2013 but no spraying was carried out in the following 2 years. The timeliness of house visits improved significantly after the responsibility was transferred from a vector control technician to primary health care staff.

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Vector transmission

Cited by 16 publications

References 103 publications

Infection with Trypanosoma Cruzi Chagas and Characterization of Human Habitats of Triatoma Picturata (Usinger) in Western Mexico

Infection with Trypanosoma Cruzi Chagas and Characterization of Human Habitats of Triatoma Picturata (Usinger) in Western Mexico

Chagas Heart Disease: Beyond a Single Complication, from Asymptomatic Disease to Heart Failure

Implementing a vector surveillance-response system for chagas disease control: a 4-year field trial in Nicaragua

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