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Abstract:

Calculating epidemiological measures of infection by Trypanosoma cruzi, the causative agent of Chagas disease, is complex, because it involves several species, different stages of infection in humans and multiple transmission routes. Using the next-generation matrix method, we analysed a model which considers the three stages of human infection, triatomines and dogs (the main domestic reservoirs of T. cruzi when triatomines are present) and the main transmission routes. We derived R 0 and type-reproduction numbers T. We deduced formulas for the number of new infections generated through each transmission route by each infected individual. We applied our findings in Argentine Gran Chaco. The expressions achieved allowed quantifying the high infectivity of dogs and emphasizing the epidemiological importance of the long and asymptomatic chronic indeterminate stage in humans in the spread of the infection. According to the model, it is expected that one infected human infects 21 triatomines, that 100 infected triatomines are necessary to infect one human and 34 to infect a dog, and that each dog infects on average one triatomine per day. Our results may allow quantifying the effect of control measures on infected humans, triatomines and dogs (or other highly infected vertebrate) or on a specific route of transmission, in other scenarios. © Cambridge University Press 2016.

Registro:

Documento: Artículo
Título:Analysis of the transmission of Trypanosoma cruzi infection through hosts and vectors
Autor:Fabrizio, M.C.; Schweigmann, N.J.; Bartoloni, N.J.
Filiación:Departamento de Métodos Cuantitativos y Sistemas de Información, Facultad de Agronomía, Universidad de Buenos Aires, Av San Martín 4453, Buenos Aires, C1417DSE, Argentina
Departamento de Ecología, Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, IEGEBA (CONICET), Buenos Aires, C1428EHA, Argentina
Palabras clave:Chagas disease; mathematical model; next-generation matrix; Trypanosoma cruzi; Article; Chagas disease; disease transmission; host; human; infection; nonhuman; priority journal; Trypanosoma cruzi; animal; Argentina; biological model; Chagas disease; disease carrier; dog; Dog Diseases; endemic disease; insect vector; parasitology; physiology; rural population; theoretical model; transmission; Triatominae; Animals; Argentina; Chagas Disease; Disease Reservoirs; Dog Diseases; Dogs; Endemic Diseases; Humans; Insect Vectors; Models, Biological; Models, Theoretical; Rural Population; Triatominae; Trypanosoma cruzi
Año:2016
Volumen:143
Número:9
Página de inicio:1168
Página de fin:1178
DOI: http://dx.doi.org/10.1017/S0031182016000548
Título revista:Parasitology
Título revista abreviado:Parasitology
ISSN:00311820
CODEN:PARAA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00311820_v143_n9_p1168_Fabrizio

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Citas:

---------- APA ----------
Fabrizio, M.C., Schweigmann, N.J. & Bartoloni, N.J. (2016) . Analysis of the transmission of Trypanosoma cruzi infection through hosts and vectors. Parasitology, 143(9), 1168-1178.
http://dx.doi.org/10.1017/S0031182016000548
---------- CHICAGO ----------
Fabrizio, M.C., Schweigmann, N.J., Bartoloni, N.J. "Analysis of the transmission of Trypanosoma cruzi infection through hosts and vectors" . Parasitology 143, no. 9 (2016) : 1168-1178.
http://dx.doi.org/10.1017/S0031182016000548
---------- MLA ----------
Fabrizio, M.C., Schweigmann, N.J., Bartoloni, N.J. "Analysis of the transmission of Trypanosoma cruzi infection through hosts and vectors" . Parasitology, vol. 143, no. 9, 2016, pp. 1168-1178.
http://dx.doi.org/10.1017/S0031182016000548
---------- VANCOUVER ----------
Fabrizio, M.C., Schweigmann, N.J., Bartoloni, N.J. Analysis of the transmission of Trypanosoma cruzi infection through hosts and vectors. Parasitology. 2016;143(9):1168-1178.
http://dx.doi.org/10.1017/S0031182016000548