Approach on risk factors of bovine trypanosomosis due to Trypanosoma vivax in the Bolivian and Brazilian pantanals

Silva, Roberto Aguilar M. S.

doi:10.35172/rvz.2006.v13.261

Cited by 3 publications

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“…Tabanids have great potential for mechanical transmission of pathogens and have been associated with disease outbreaks that affect livestock. Some species are more abundant and efficient vectors, such as those in the genus Tabanus , which have been considered as the primary vector species of pathogens within the Tabanidae family ( Silva et al, 2002 ; Parra-Henao et al, 2008 ; Silva, 2006 ). In the biome cerrado of Tocantins, this genus was abundant, representing the second most sampled genus (25.3% of the total).…”

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Tabanidae (Diptera) collected on horses in a Cerrado biome in the state of Tocantins, Brazil

Costa,

Rodrigues,

Lima

et al. 2024

Rev. Bras. Parasitol. Vet.

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Tabanidae (Diptera), popularly known as horse flies, is an important vector group. This is the first study to ascertain the abundance and diversity of horse flies in horses at the cerrado biome of the state of Tocantins, Brazil. Collecting took place in typical Cerrado, and sampling occurred in the dry and rainy seasons. The horseflies were collected from horses using an entomological net. A total of 249 individuals were collected and spread over 25 species. The prevalent species were Stypommisa aripuana (25.8%) and Catachlorops rufescens (6.4%), in the dry period, and Fidena lissorhina (22.5%), Tabanus occidentalis var. dorsovittatus (10%) and Poeciloderas quadripunctatus (6.4%), in the rainy season. The results suggest that tabanids attack horses throughout the dry and rainy seasons, posing a constant threat to their health in the Cerrado of Tocantins.

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Section: Discussionmentioning

confidence: 99%

Tabanidae (Diptera) collected on horses in a Cerrado biome in the state of Tocantins, Brazil

Costa,

Rodrigues,

Lima

et al. 2024

Rev. Bras. Parasitol. Vet.

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Activity of cholinesterases and adenosine deaminase in blood and serum of rats experimentally infected withTrypanosoma cruzi

Silva

Pimentel

Fiorenza

et al. 2011

Annals of Tropical Medicine & Parasitology

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This study aimed to evaluate the activity of cholinesterases and adenosine deaminase (ADA) in blood and serum of rats infected with Trypanosoma cruzi. Twelve adult rats were used in the experiment divided into two uniform groups. Rodents from group A (control group) were non-infected and animals from group B served as infected, receiving intraperitoneally 3.3610 7 trypomastigotes/each. Blood collection was performed at days 60 and 120 post-infection (PI) in order to evaluate the hemogram, blood activity of acetylcholinesterase, and serum butyrylcholinesterase and ADA activities. Hematological parameters did not differ between groups. A significant increase (P,0.05) of acetylcholinesterase activity was observed in blood while butyrylcholinesterase had a significant reduction (P,0.01) in serum of infected rats at days 60 and 120 PI. ADA activity in serum showed an inhibition in infected animals when compared to non-infected at day 120 PI. Based on these results, it is possible to conclude that the activity of cholinesterases and ADA were changed in animals infected with T. cruzi. The possible causes of these alterations will be discussed in this paper.

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Epidemiology of Animal Trypanosomiasis

Kapo,

Goletić,

Škapur

et al. 2023

Infectious Diseases

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Trypanosomiasis, alternatively known as trypanosomosis, is the name of several diseases in vertebrates, induced by parasitic protozoans belonging to the Trypanosoma genus. The best-studied species is Trypanosoma brucei with two subspecies: Trypanosoma brucei gambiense and Trypanosoma brucei rhodesiense, which cause Human African trypanosomiasis (HAT), also known as sleeping sickness. Moreover, African animal trypanosomiasis (AAT) poses a substantial risk of spillover and the transmission of different species and strains among populations, impacting both livestock and wildlife. Increased human activity and pressure on land resources are increasing wildlife-livestock-human infections. In addition to the role of human Trypanosoma reservoir, animals can become infected and ill as a consequence of the activity of other forms of trypanosomes, such as Trypanosoma congolense, Trypanosoma vivax, Trypanosoma brucei brucei, Trypanosoma simiae, Trypanosoma evansi, and others. Tsetse flies (Glossina spp.) can transfer parasites through their salivary glands or, in rare instances, by congenital transmission. Chagas disease (Morbus Chagas), also known as American trypanosomiasis, is a chronic infection caused by Trypanosoma cruzi. The competent vectors of Chagas disease are bed bugs from the genera Triatoma, Rhodnius, and Panstrongylus. All major groups of mammals, including Artiodactyla, Chiroptera, Primates, Carnivora, Rodentia, Cingulata, Pilosa, and Didelphimorphia, have been shown to participate in the transmission cycle of T. cruzi. Chagas disease is endemic in Central and South America. Human and animal trypanosomiases continue to present a major human and animal public health threat globally. The high genetic diversity of Trypanosoma spp. requires further research to prevent cross-species transmission, which could affect animal, human, and environmental health. In this chapter, we delve into the most significant Trypanosoma species, their epidemiology, distribution, importance for biodiversity, and public health.

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Approach on risk factors of bovine trypanosomosis due to Trypanosoma vivax in the Bolivian and Brazilian pantanals

Cited by 3 publications

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Tabanidae (Diptera) collected on horses in a Cerrado biome in the state of Tocantins, Brazil

Tabanidae (Diptera) collected on horses in a Cerrado biome in the state of Tocantins, Brazil

Activity of cholinesterases and adenosine deaminase in blood and serum of rats experimentally infected withTrypanosoma cruzi

Epidemiology of Animal Trypanosomiasis

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