期刊论文详细信息
Revista do Instituto de Medicina Tropical de São Paulo
Dynamics of transmission of Trypanosoma cruzi in a rural area of Argentina. I — The dog reservoir: an epidemiological profile
Ricardo E. Gürtler2  Marta Lauricelia1  Nora D. Solakz2  Marcos A. Bujas1  Cristina Wisnivesky-colli2 
[1] ,Universidad de Buenos Aires Facultad de Siencias Exactas y Naturales Departamento de Ciencias Biológicas,Argentina
关键词: Chagas' Disease;    Xenodiagnosis;    Reservoirs;    Dogs;    Rural Area in Argentina;    Transmission of the Disease from animal to man;    Sorodiagnosis;   
DOI  :  10.1590/S0036-46651986000100006
来源: SciELO
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【 摘 要 】

A community-based survey of household-associated mongrel dogs was undertaken in a rural area of Argentina to investigate pet population dynamics and the behavior of natural Trypanosoma cruzi infection in the reservoir by xenodiagnosis and serologic techniques. Age structure of dog population suggested that individuals participate in the domestic cycle of transmission for a mean period of 4 years; age-specific sex ratios indicated differential survival of female dogs in all age groups, especially among pups. An overall prevalence rate of 84%, increasing from 69% below age 1 to 100% in dogs older than 3 years, strongly support a highly efficient T. cruzi transmission to dogs, where eongenital/lactogenic transmission might be involved. A 98% of concordance was found between serologic results and parasitologically confirmed infections. Seroreactive dogs below age 10, unlike humans, showed an age-independent persistence of parasitemia. At least 50% of dogs tested were closely associated with sleeping quarters of people. A highly efficient T. cruzi transmission, close trophic association with Triatoma infestans bugs, age-independent persistence of parasitemia, suitable exposure patterns and high recruitment of susceptible individuals, qualify dogs as amplifying hosts of Chagas' disease in rural communities of central and northern Argentina. Control measures directed to reduce dog-vector contact should be encouraged by primary healthcare programmes, and performed in connection with chemical control of vector bugs.

【 授权许可】

CC BY-NC   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License

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