Reproductive, productive and financial consequences of chronic Trypanosoma vivax infection in a dairy cattle herd in a region without a cyclic vector

Couto, Luiz Fellipe Monteiro; Bastos, Thiago Souza Azeredo; Morais, Igor Maciel Lopes de; Salvador, Vanessa Ferreira; Leal, Luccas Lourenzzo Lima Lins; Falavigna, Ricardo Backstron; Spricigo, José Felipe Warmling; Mota, Rinaldo Aparecido; Cruz, Breno Cayero; Colli, Marcos Henrique Alcantara; Scarpa, Alexandre Braga; Soares, Vando Edesio; Ferreira, Lorena Lopes; Lopes, Welber Daniel Zanetti

doi:10.1016/j.vetpar.2024.110221

Veterinary Parasitology

2024

DOI: 10.1016/j.vetpar.2024.110221

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Reproductive, productive and financial consequences of chronic Trypanosoma vivax infection in a dairy cattle herd in a region without a cyclic vector

Luiz Fellipe Monteiro Couto,

Thiago Souza Azeredo Bastos,

Igor Maciel Lopes de Morais

et al.

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From Intact to Highly Degraded Mitochondrial Genes in Trypanosoma vivax: New Insights into Introduction from Africa and Adaptation to Exclusive Mechanical Transmission in South America

Garcia,

Rodrigues,

Rodrigues

et al. 2024

Parasitologia

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Trypanosoma vivax displays distinct mitochondrial genomes: intact in Africa and degraded in South America. This finding, formerly reported from four isolates, suggested an association between mitochondrial mutations and adaptation to exclusive mechanical transmission outside Africa, circumventing mitochondrial activity essential for cyclical transmission by tsetse flies. Here, we characterized the mitochondrial ND7 and COIII genes in 25 South American isolates of T. vivax from livestock from Argentina, Brazil, Colombia, Ecuador, and Venezuela, as well as in 11 African isolates from Mozambique, Ethiopia, Uganda, Nigeria, and Burkina Faso from tsetse flies, antelopes, and cattle. Phylogenetic inference supported the lineages TVV (Trypanosoma vivax vivax) and TVL (Trypanosoma vivax-like), predominant in South America/West Africa and East Africa, respectively. Both ND7 and COIII genes were intact in all African TVV and TVL isolates and, for the first time, in 10 South American isolates from Brazil. Remaining South American isolates exhibited some degree of gene erosion, including ~142 bp deletion at the 3′ end of ND7 disclosed in Venezuela and Colombia, ~163 bp deletion at the 3′ end of ND7 in Brazil and Argentina, and ~750 bp deletion from the 5′ end of ND7 to the 3′ end of COIII in Venezuela. Comprehensive analyses of whole mitochondrial genomes from additional South American and African isolates are crucial for formulating reliable hypotheses regarding the origin, absence, and rapid mitochondrial degradation observed in South American T. vivax.

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From Intact to Highly Degraded Mitochondrial Genes in Trypanosoma vivax: New Insights into Introduction from Africa and Adaptation to Exclusive Mechanical Transmission in South America

Garcia,

Rodrigues,

Rodrigues

et al. 2024

Parasitologia

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show abstract

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Reproductive, productive and financial consequences of chronic Trypanosoma vivax infection in a dairy cattle herd in a region without a cyclic vector

Cited by 1 publication

References 40 publications

From Intact to Highly Degraded Mitochondrial Genes in Trypanosoma vivax: New Insights into Introduction from Africa and Adaptation to Exclusive Mechanical Transmission in South America

From Intact to Highly Degraded Mitochondrial Genes in Trypanosoma vivax: New Insights into Introduction from Africa and Adaptation to Exclusive Mechanical Transmission in South America

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